Staff profile

• atomic theory
• interstellar physics

Authored book

• Flower, D. (2007). Molecular Collisions in the Interstellar Medium. (2nd ed.). Cambridge University Press

Book review

• Flower, D. (1984). Book-Review - Planetary Nebulae - I.A.U. SYMP.103 - London - 1982AUG

Conference Paper

• Flower, D. (2000). H₂ in Space. In Atomic and Molecular Data for Astrophysics: New Developments, Case Studies and Future Needs: 24th IAU General Assembly, Joint Discussion 1

Journal Article

• Flower, D. (1970). Infra-red line spectra of planetary nebulae. Monthly Notices of the Royal Astronomical Society, 147, 245-
• Faure, A., Hily-Blant, P., Pineau des Forêts, G., & Flower, D. R. (2024). The chemistry and excitation of H2 and HD in the early Universe. Monthly Notices of the Royal Astronomical Society, 531(1), 340-354. https://doi.org/10.1093/mnras/stae994
• Flower, D. R. (2024). Collisions of electrons with interstellar grains. Monthly Notices of the Royal Astronomical Society, 529(4), 3284-3288. https://doi.org/10.1093/mnras/stae678
• Flower, D. (2023). Three-body recombination of hydrogen in the early Universe. Monthly Notices of the Royal Astronomical Society: Letters, 523(1), https://doi.org/10.1093/mnrasl/slad047
• Flower, D., Pineau des Forêts, G., Hily-Blant, P., Faure, A., Lique, F., & González-Lezana, T. (2021). Collisional cooling of primordial and interstellar media by H2. Monthly Notices of the Royal Astronomical Society, 507(3), 3564-3571. https://doi.org/10.1093/mnras/stab2272
• Faure, A., Hily-Blant, P., Rist, C., Pineau des Forêts, G., Matthews, A., & Flower, D. (2019). The ortho-to-para ratio of water in interstellar clouds. Monthly Notices of the Royal Astronomical Society, 487(3), 3392-3403. https://doi.org/10.1093/mnras/stz1531
• Hily-Blant, P., Faure, A., Rist, C., Pineau des Forêts, G., & Flower, D. (2018). Modelling the molecular composition and nuclear-spin chemistryof collapsing pre-stellar sources★. Monthly Notices of the Royal Astronomical Society, 477(4), 4454-4472. https://doi.org/10.1093/mnras/sty881
• Akyilmaz, M., Flower, D., Hily-Blant, P., des Forets, G., & Walmsley, C. (2007). The depletion of NO in pre-protostellar cores. Astronomy & Astrophysics, 462(1), 221-U15. https://doi.org/10.1051/0004-6361%3A20066131
• Giannini, T., McCoey, C., Nisini, B., Cabrit, S., Garatti, A., Calzoletti, L., & Flower, D. (2006). Molecular line emission in HH54: a coherent view from near to far infrared. Astronomy & Astrophysics, 459(3), 821-835. https://doi.org/10.1051/0004-6361%3A20065127
• Flower, D., des Forets, G., & Walmsley, C. (2006). The abundances of nitrogen-containing molecules during pre-protostellar collapse. Astronomy & Astrophysics, 456(1), 215-U41. https://doi.org/10.1051/0004-6361%3A20065375
• Wrathmall, S., & Flower, D. (2006). A quantum-mechanical study of rotational transitions in H-2 induced by H. Journal of Physics B: Atomic, Molecular and Optical Physics, 39(11), L249-L253
• Flower, D., des Forets, G., & Walmsley, C. (2006). The importance of the ortho: para H-2 ratio for the deuteration of molecules during pre-protostellar collapse. Astronomy & Astrophysics, 449(2), 621-629. https://doi.org/10.1051/0004-6361%3A20054246
• Flower, D., Pineau Des Forêts, G., & Walmsley, C. (2005). Freeze-out and coagulation in pre-protostellar collapse. Astronomy & Astrophysics, 436, 933-943. https://doi.org/10.1051/0004-6361%3A20042481
• Maret, S., Ceccarelli, C., Tielens, A., Caux, E., Lefloch, B., Faure, A., …Flower, D. (2005). Methanol emission from low mass protostars
• Flower, D., Pineau des Forêts, G., & Walmsley, C. (2004). Multiply-deuterated species in prestellar cores. Astronomy & Astrophysics, 427(3), 887-893. https://doi.org/10.1051/0004-6361%3A20041464
• Pottage, J., Flower, D., & Davis, S. (2004). The rotational excitation of methanol by para-hydrogen. Monthly Notices of the Royal Astronomical Society, 352(1), 39-43. https://doi.org/10.1111/j.1365-2966.2004.07888.x
• Flower, D., & Middleton, M. (2004). Electron attachment to interstellar grains. Monthly Notices of the Royal Astronomical Society, 352, 837-840
• Giannini, T., McCoey, C., Caratti o Garatti, A., Nisini, B., Lorenzetti, D., & Flower, D. (2004). Infrared knots along protostellar jets (Giannini+, 2004)
• Giannini, T., McCoey, C., Caratti o Garatti, A., Nisini, B., Lorenzetti, D., & Flower, D. (2004). On the excitation of the infrared knots along protostellar jets. Astronomy & Astrophysics, 419, 999-1014. https://doi.org/10.1051/0004-6361%3A20040087
• McCoey, C., Giannini, T., Flower, D., & Caratti o Garatti, A. (2004). On the excitation of the infrared knots in the HH99 outflow. Monthly Notices of the Royal Astronomical Society, 353, 813-824. https://doi.org/10.1111/j.1365-2966.2004.08109.x
• Walmsley, C., Flower, D., & Pineau des Forêts, G. (2004). Complete depletion in prestellar cores. Astronomy & Astrophysics, 418, 1035-1043. https://doi.org/10.1051/0004-6361%3A20035718
• Cabrit, S., Flower, D., Des Forêts, G. P., Le Bourlot, J., & Ceccarelli, C. (2004). H₂ Diagnostics of Magnetic Molecular Shocks in Bipolar Outflows. Astrophysics and Space Science, 292, 501-508
• Pottage, J., Flower, D., & Davis, S. L. (2004). The torsional excitation of methanol by helium. Journal of Physics B: Atomic, Molecular and Optical Physics, 37, 165-177. https://doi.org/10.1088/0953-4075/37/1/010
• Leurini, S., Schilke, P., Menten, K., Flower, D., Pottage, J., & Xu, L. (2004). Methanol as a diagnostic tool of interstellar clouds. I. Model calculations and application to molecular clouds. Astronomy & Astrophysics, 422, 573-585. https://doi.org/10.1051/0004-6361%3A20047046
• Flower, D., & Pineau des Forêts, G. (2003). The influence of grains on the propagation and structure of C-type shock waves in interstellar molecular clouds. Monthly Notices of the Royal Astronomical Society, 343(2), 390-400. https://doi.org/10.1046/j.1365-8711.2003.06716.x
• Flower, D., Le Bourlot, J., Pineau des Forêts, G., & Cabrit, S. (2003). Diagnosing the conditions in molecular outflow sources: New developments in shock wave models with non-equilibrium chemistry. Astrophysics and Space Science, 287, 183-186. https://doi.org/10.1023/b%3Aastr.0000006221.18403.18
• Flower, D., Le Bourlot, J., Pineau des Forêts, G., & Cabrit, S. (2003). The contributions of J-type shocks to the H₂ emission from molecular outflow sources. Monthly Notices of the Royal Astronomical Society, 341, 70-80. https://doi.org/10.1046/j.1365-8711.2003.06463.x
• Flower, D., & Forêts, G. P. D. (2003). The role of ambipolar diffusion in the fragmentation of condensations of the primordial gas. Monthly Notices of the Royal Astronomical Society, 341, 1272-1278
• Le Bourlot, J., Pineau des Forêts, G., Flower, D., & Cabrit, S. (2002). New determinations of the critical velocities of C-type shock waves in dense molecular clouds: application to the outflow source in Orion. Monthly Notices of the Royal Astronomical Society, 332(4), 985-993. https://doi.org/10.1046/j.1365-8711.2002.05373.x
• Flower, D. (2002). The fragmentation of condensations of the primordial gas. Monthly Notices of the Royal Astronomical Society, 333, 763-767. https://doi.org/10.1046/j.1365-8711.2002.05411.x
• Flower, D. (2002). H₂ in space
• Pottage, J., Flower, D., & Davis, S. L. (2002). The rotational excitation by helium of methanol in its ground and first excited torsional states. Journal of Physics B: Atomic, Molecular and Optical Physics, 35, 2541-2553. https://doi.org/10.1088/0953-4075/35/11/312
• Flower, D. (2001). The rotational excitation of CO by H₂. Journal of Physics B: Atomic, Molecular and Optical Physics, 34, 2731-2738. https://doi.org/10.1088/0953-4075/34/13/315
• Flower, D., & Pineau des Forêts, G. (2001). The thermal balance of the first structures in the primordial gas. Monthly Notices of the Royal Astronomical Society, 323, 672-676. https://doi.org/10.1046/j.1365-8711.2000.03405.x
• Flower, D. (2001). The rotational excitation of OCS by He at low temperatures. Monthly Notices of the Royal Astronomical Society, 328, 147-149. https://doi.org/10.1046/j.1365-8711.2001.04879.x
• Pineau des Forêts, G., Flower, D., Aguillon, F., Sidis, V., & Sizun, M. (2001). Collisional excitation of H₂ by grains in C-type shocks. Monthly Notices of the Royal Astronomical Society, 323, L7-L11. https://doi.org/10.1046/j.1365-8711.2001.04473.x
• Pottage, J., Flower, D., & Davis, S. L. (2001). The rotational excitation of methanol by helium at low temperatures. Journal of Physics B: Atomic, Molecular and Optical Physics, 34, 3313-3330. https://doi.org/10.1088/0953-4075/34/16/309
• Flower, D., & Pineau des Forêts, G. (2000). The ortho:para H₂ ratio in the primordial gas. Monthly Notices of the Royal Astronomical Society, 316, 901-905. https://doi.org/10.1046/j.1365-8711.2000.03611.x
• Flower, D. (2000). HD in the primordial gas. Monthly Notices of the Royal Astronomical Society, 318, 875-878. https://doi.org/10.1046/j.1365-8711.2000.03765.x
• Flower, D. (2000). Erratum: Momentum transfer between ions and neutrals in molecular gas. Monthly Notices of the Royal Astronomical Society, 315, 431-431. https://doi.org/10.1046/j.1365-8711.2000.03603.x
• Flower, D. (2000). LETTER TO THE EDITOR: Vibrational relaxation of H₂ in collisions with rotationally excited H₂ molecules. Journal of Physics B: Atomic, Molecular and Optical Physics, 33, L193-L195. https://doi.org/10.1088/0953-4075/33/5/107
• May, P., Pineau des Forêts, G., Flower, D., Field, D., Allan, N., & Purton, J. (2000). Sputtering of grains in C-type shocks. Monthly Notices of the Royal Astronomical Society, 318, 809-816. https://doi.org/10.1046/j.1365-8711.2000.03796.x
• Flower, D. (2000). Quantal coupled channels calculations of the rates of self-relaxation of ortho- and para-H₂. Journal of Physics B: Atomic, Molecular and Optical Physics, 33, 5243-5249. https://doi.org/10.1088/0953-4075/33/22/323
• Flower, D., Bourhis, G., & Launay, J. (2000). Molcol: A program for solving atomic and molecular collision problems. Computer Physics Communications, 131, 187-201. https://doi.org/10.1016/s0010-4655%2800%2900118-1
• Flower, D., Le Bourlot, J., Pineau des Forêts, G., & Roueff, E. (2000). The cooling of astrophysical media by HD. Monthly Notices of the Royal Astronomical Society, 314, 753-758
• Flower, D. (2000). Momentum transfer between ions and neutrals in molecular gas. Monthly Notices of the Royal Astronomical Society, 313, L19-L21. https://doi.org/10.1046/j.1365-8711.2000.03425.x
• Wilgenbus, D., Cabrit, S., Pineau des Forêts, G., & Flower, D. (2000). The ortho:para-H_2 ratio in C- and J-type shocks. Astronomy and Astrophysics, 356, 1010-1022
• Wilgenbus, D., Cabrit, S., Pineau des Forets, G., & Flower, D. (2000). Ortho:para-H2 ratio in C and J shocks (Wilgenbus+, 2000)
• Flower, D. (1999). A quantum mechanical study of the rotational excitation of HD by H2. Journal of Physics B: Atomic, Molecular and Optical Physics, 32(7), 1755-1767. https://doi.org/10.1088/0953-4075/32/7/016
• Le Bourlot, J., Pineau des Forêts, G., & Flower, D. (1999). The cooling of astrophysical media by H_2. Monthly Notices of the Royal Astronomical Society, 305, 802-810. https://doi.org/10.1046/j.1365-8711.1999.02497.x
• Flower, D., & Roueff, E. (1999). Rovibrational excitation of HD in collisions with atomic and molecular hydrogen. Monthly Notices of the Royal Astronomical Society, 309, 833-835. https://doi.org/10.1046/j.1365-8711.1999.02888.x
• Flower, D., & Roueff, E. (1999). Rovibrational relaxation in collisions between H₂ molecules: II. Influence of the rotational state of the perturber. Journal of Physics B: Atomic, Molecular and Optical Physics, 32, 3399-3407. https://doi.org/10.1088/0953-4075/32/14/310
• Flower, D., & Pineau des Forêts, G. (1999). H_2 emission from shocks in molecular outflows: the significance of departures from a stationary state. Monthly Notices of the Royal Astronomical Society, 308, 271-280. https://doi.org/10.1046/j.1365-8711.1999.02729.x
• Flower, D. (1999). Rotational excitation of HCO^+ by H_2. Monthly Notices of the Royal Astronomical Society, 305, 651-653. https://doi.org/10.1046/j.1365-8711.1999.02451.x
• Flower, D., & Roueff, E. (1999). LETTER TO THE EDITOR: The influence of vibration on rotational cross sections in and HD. Journal of Physics B: Atomic, Molecular and Optical Physics, 32, L171-L175
• Walmsley, C., Pineau des Forêts, G., & Flower, D. (1999). Silicon chemistry in PDRs. Astronomy and Astrophysics, 342, 542-550
• Roueff, E., & Flower, D. (1999). A quantum mechanical study of the rotational excitation of HD by H. Monthly Notices of the Royal Astronomical Society, 305, 353-356. https://doi.org/10.1046/j.1365-8711.1999.02414.x
• Flower, D., Roueff, E., & Zeippen, C. (1998). Rovibrational excitation of molecules by He atoms. Journal of Physics B: Atomic, Molecular and Optical Physics, 31, 1105-1113
• Flower, D., & Roueff, E. (1998). LETTER TO THE EDITOR: Vibrational relaxation in H - collisions. Journal of Physics B: Atomic, Molecular and Optical Physics, 31, L955-L958
• Flower, D., & Pineau des Forets, G. (1998). C-type shocks in the interstellar medium: profiles of CH^+ and CH absorption lines. Monthly Notices of the Royal Astronomical Society, 297, 1182-1188. https://doi.org/10.1046/j.1365-8711.1998.01574.x
• Chieze, J., Pineau des Forets, G., & Flower, D. (1998). Temporal evolution of MHD shocks in the interstellar medium. Monthly Notices of the Royal Astronomical Society, 295, 672-
• Davies, P., & Flower, D. (1998). Electron capture from metastable He atoms by ions. Journal of Physics B: Atomic, Molecular and Optical Physics, 31, 3639-3646
• Joulain, K., Falgarone, E., Des Forets, G. P., & Flower, D. (1998). Non-equilibrium chemistry in the dissipative structures of interstellar turbulence. Astronomy and Astrophysics, 340, 241-256
• Flower, D. (1998). The rotational excitation of H_2 by H_2. Monthly Notices of the Royal Astronomical Society, 297, 334-336. https://doi.org/10.1046/j.1365-8711.1998.01531.x
• Flower, D., & Roueff, E. (1998). Rovibrational relaxation in collisions between H2 molecules: I. Transitions induced by ground state para-H2. Journal of Physics B: Atomic, Molecular and Optical Physics, 31, 2935-2947. https://doi.org/10.1088/0953-4075/31/13/012
• Flower, D. (1997). A quantal study of the rovibrational excitation of by H. Journal of Physics B: Atomic, Molecular and Optical Physics, 30, 3009-3017
• Schilke, P., Walmsley, C., Pineau des Forets, G., & Flower, D. (1997). SiO production in interstellar shocks. Astronomy and Astrophysics, 321, 293-304
• Field, D., May, P., Pineau des Forets, G., & Flower, D. (1997). Sputtering of the refractory cores of interstellar grains. Monthly Notices of the Royal Astronomical Society, 285, 839-846. https://doi.org/10.1093/mnras/285.4.839
• Flower, D. (1997). Rotational excitation of hydrogen molecules by hydrogen atoms. Monthly Notices of the Royal Astronomical Society, 288, 627-630
• Flower, D., & Wroe, R. (1996). LETTER TO THE EDITOR: Rotational excitation of by H at low energies. Journal of Physics B: Atomic, Molecular and Optical Physics, 29, L851-L854
• Schilke, P., Walmsley, C., Pineau des Forets, G., & Flower, D. (1996). SiO production in interstellar shocks (Schilke+ 1997)
• Flower, D., Pineau des Forets, G., Field, D., & May, P. (1996). The structure of MHD shocks in molecular outflows: grain sputtering and SiO formation. Monthly Notices of the Royal Astronomical Society, 280, 447-457. https://doi.org/10.1093/mnras/280.2.447
• Jeffery, C., & Flower, D. (1996). Models for the interpretation of stellar and interstellar spectra. Observatory, 116, 286-288
• Herrero, B., Cooper, I., Dickinson, A., & Flower, D. (1995). Charge transfer in slow N²⁺+H collisions. Journal of Physics B: Atomic, Molecular and Optical Physics, 28, 711-724. https://doi.org/10.1088/0953-4075/28/4/019
• Le Bourlot, J., Pineau des Forets, G., Roueff, E., & Flower, D. (1995). On the uniqueness of the solutions to the chemical rate equations in interstellar clouds: the gas-dust interface. Astronomy and Astrophysics, 302, 870-
• Flower, D., Pineau des Forets, G., & Walmsley, C. (1995). Hot shocked ammonia towards SGR B2. Astronomy and Astrophysics, 294, 815-824
• Slim, H., Bransden, B., & Flower, D. (1995). Formation of autoionizing states of helium in collisions with protons. Journal of Physics B: Atomic, Molecular and Optical Physics, 28, 1623-1642. https://doi.org/10.1088/0953-4075/28/8/022
• Roueff, E., Forets, G. P. D., & Flower, D. (1995). The Importance of Chemical Data for the Study of Interstellar Shocks. Astrophysics and Space Science, 233, 125-137
• Flower, D., & Pineau des Forets, G. (1995). Non-thermal sputtering of interstellar grains in magnetohydrodynamic shocks. Monthly Notices of the Royal Astronomical Society, 275, 1049-1056. https://doi.org/10.1093/mnras/275.4.1049
• Herrero, B., Cooper, I., Dickinson, A., & Flower, D. (1995). Low-energy electron capture from H and D by C³⁺ ions. Journal of Physics B: Atomic, Molecular and Optical Physics, 28, 4607-4618. https://doi.org/10.1088/0953-4075/28/21/009
• Flower, D., & Pineau des Forets, G. (1994). Grain / Mantle Erosion in Magnetohydrodynamic Shocks. Monthly Notices of the Royal Astronomical Society, 268, 724-
• Flower, D., Le Bourlot, J., Pineau Des Forets, G., & Roueff, E. (1994). Atomic carbon in interstellar clouds. Astronomy and Astrophysics, 282, 225-232
• Heck, E., Flower, D., Le Bourlot, J., Pineau des Forets, G., & Roueff, E. (1993). Models of the Omicron Per diffuse interstellar cloud. Monthly Notices of the Royal Astronomical Society, 262, 795-799. https://doi.org/10.1093/mnras/262.3.795
• Slim, H., Bransden, B., & Flower, D. (1993). Excitation of autoionizing states of helium in collisions with protons: validity of the first Born approximation. Journal of Physics B: Atomic, Molecular and Optical Physics, 26, L159-L163. https://doi.org/10.1088/0953-4075/26/7/002
• Le Bourlot, J., Pineau Des Forets, G., Roueff, E., & Flower, D. (1993). Infrared and submillimetric emission lines from the envelopes of dark clouds. Astronomy and Astrophysics, 267, 233-254
• Pineau des Forets, G., Roueff, E., Schilke, P., & Flower, D. (1993). Sulphur-bearing molecules as tracers of shocks in interstellar clouds. Monthly Notices of the Royal Astronomical Society, 262, 915-928
• Pineau des Forets, G., Flower, D., & Chieze, J. (1992). Dynamical mixing of interstellar clouds - The effects of adsorption on to grains. Monthly Notices of the Royal Astronomical Society, 256, 247-251. https://doi.org/10.1093/mnras/256.2.247
• Heck, E., Flower, D., Le Bourlot, J., Pineau des Forets, G., & Roueff, E. (1992). On the evolution of diffuse interstellar clouds. Monthly Notices of the Royal Astronomical Society, 258, 377-383. https://doi.org/10.1093/mnras/258.2.377
• Jackson, D., Slim, H., Bransden, B., & Flower, D. (1992). Excitation and charge transfer in He⁺-H collisions. Journal of Physics B: Atomic, Molecular and Optical Physics, 25, L127-L130. https://doi.org/10.1088/0953-4075/25/5/002
• Abgrall, H., Le Bourlot, J., Pineau Des Forets, G., Roueff, E., Flower, D., & Heck, L. (1992). Photodissociation of H2 and the H/H2 transition in interstellar clouds. Astronomy and Astrophysics, 253, 525-536
• Jaquet, R., Staemmler, V., Smith, M., & Flower, D. (1992). Excitation of the fine-structure transitions of O(^3P_j) in collisions with ortho- and para-H_2. Journal of Physics B: Atomic, Molecular and Optical Physics, 25, 285-297. https://doi.org/10.1088/0953-4075/25/1/030
• Schilke, P., Walmsley, C., Pineau Des Forets, G., Roueff, E., Flower, D., & Guilloteau, S. (1992). A study of HCN, HNC and their isotopomers in OMC-1. I - Abundances and chemistry. Astronomy and Astrophysics, 256, 595-612
• Pineau des Forets, G., Roueff, E., & Flower, D. (1992). The two chemical phases of dark interstellar clouds. Monthly Notices of the Royal Astronomical Society, 258, 45P-47P. https://doi.org/10.1093/mnras/258.1.45p
• Slim, H., Heck, E., Bransden, B., & Flower, D. (1991). Ionization and charge transfer in proton-helium collisions. Journal of Physics B: Atomic, Molecular and Optical Physics, 24(17), L421-L424. https://doi.org/10.1088/0953-4075/24/17/002
• Brand, P. (1991). Book Review: Molecular collisions in the interstellar medium / Cambridge U Press, 1990. Observatory, 111, 42-
• Dubernet, M., Flower, D., & Hutson, J. M. (1991). The dynamics of open-shell Van der Waals complexes. The Journal of Chemical Physics, 94, 7602-7618
• Pineau des Forets, G., Flower, D., & Millar, T. (1991). Chemical processes in dark interstellar clouds - The effects of CNO depletion. Monthly Notices of the Royal Astronomical Society, 253, 217-221. https://doi.org/10.1093/mnras/253.2.217
• Flower, D., & Pineau des Forets, G. (1991). Thermal and chemical evolution of interstellar clouds: Erratum. Monthly Notices of the Royal Astronomical Society, 249, 191-787. https://doi.org/10.1093/mnras/249.1.191
• Staemmler, V., & Flower, D. (1991). Excitation of the C(2p2. ³Pj) fine structure states in collisions with He(1s² ¹S₀). Journal of Physics B: Atomic, Molecular and Optical Physics, 24, 2343-2351. https://doi.org/10.1088/0953-4075/24/9/013
• Pineau des Forets, G., Flower, D., & Herbst, E. (1991). Thermal and chemical evolution of interstellar clouds - Complex molecule formation. Monthly Notices of the Royal Astronomical Society, 253, 359-363. https://doi.org/10.1093/mnras/253.2.359
• Schroder, K., Staemmler, V., Smith, M., Flower, D., & Jaquet, R. (1991). Excitation of the fine-structure transitions of C in collisions with ortho- and para-H₂. Journal of Physics B: Atomic, Molecular and Optical Physics, 24, 2487-2502. https://doi.org/10.1088/0953-4075/24/10/007
• Forster, C., Cooper, I., Dickinson, A., Flower, D., & Mendez, L. (1991). Charge transfer in slow collisions of Ne²⁺ with H. Journal of Physics B: Atomic, Molecular and Optical Physics, 24, 3433-3444. https://doi.org/10.1088/0953-4075/24/15/012
• Pineau des Forets, G., Flower, D., & McCarroll, R. (1991). The para-H2:ortho-H2 ratio and the deuteration of interstellar molecules. Monthly Notices of the Royal Astronomical Society, 248, 173-175. https://doi.org/10.1093/mnras/248.1.173
• Slim, H., Heck, E., Bransden, B., & Flower, D. (1991). Theoretical differential cross sections for proton-helium scattering at intermediate energies. Journal of Physics B: Atomic, Molecular and Optical Physics, 24(9), 2353-2358. https://doi.org/10.1088/0953-4075/24/9/014
• Slim, H., Heck, E., Bransden, B., & Flower, D. (1991). Charge transfer and excitation in proton-helium collisions. Journal of Physics B: Atomic, Molecular and Optical Physics, 24(7), 1683-1694. https://doi.org/10.1088/0953-4075/24/7/021
• Flower, D. (1990). Excitation of fine structure transitions in O by H2. Monthly Notices of the Royal Astronomical Society, 242, 1P-3P. https://doi.org/10.1093/mnras/242.1.1p
• Pineau des Forets, G., Roueff, E., & Flower, D. (1990). The formation of nitrogen-bearing species in dark interstellar clouds. Monthly Notices of the Royal Astronomical Society, 244, 668-674
• Offer, A., & Flower, D. (1990). Rotational excitation of OH by para- and ortho-H2. Journal of Physics B: Atomic, Molecular and Optical Physics, 23, L391-L394
• Dyson, J. (1990). Book Review: Molecular collisions in the interstellar medium / Cambridge U Press, 1990. Gerontology & Geriatrics Education, 174, 327-. https://doi.org/10.1300/j021v10n02_08
• Slim, H., Heck, E., Bransden, B., & Flower, D. (1990). Calculated Cross-sections For Electron-capture By Protons From Helium Into The H(n = 3) Level. Journal of Physics B: Atomic, Molecular and Optical Physics, 23, L611-L617. https://doi.org/10.1088/0953-4075/23/19/007
• Heck, L., Flower, D., & Pineau Des Forêts, G. (1990). A computer program for calculating the structure of magnetohydrodynamical shocks in interstellar clouds. Computer Physics Communications, 58, 169-179. https://doi.org/10.1016/0010-4655%2890%2990143-o
• Flower, D., & Pineau-Des-Forets, G. (1990). Thermal and Chemical Evolution of Interstellar Clouds. Monthly Notices of the Royal Astronomical Society, 247, 500-
• Flower, D., Offer, A., & Schilke, P. (1990). The (j, k) = (3, 3) inversion line of NH3 - A possible interstellar chronometer. Monthly Notices of the Royal Astronomical Society, 244, 4P-8P
• Flower, D. (1990). Book Review - Molecular Collisions in the Interstellar Medium. Science, 249, 1314-
• Flower, D., Heck, L., Pineau des Forets, G., & Millar, T. (1990). The erosion of PAH molecules within shocks in dark clouds. Monthly Notices of the Royal Astronomical Society, 242, 512-516. https://doi.org/10.1093/mnras/242.4.512
• Offer, A., & Flower, D. (1989). Propensity rules in NH3-H2 collisions. Journal of Physics B: Atomic, Molecular and Optical Physics, 22, L439-L443
• Flower, D. (1989). Atomic and molecular processes in interstellar shocks. Journal of Physics B: Atomic, Molecular and Optical Physics, 22, 2319-2339. https://doi.org/10.1088/0953-4075/22/15/008
• Flower, D., Heck, L., & Pineau des Forets, G. (1989). Theoretical studies of interstellar molecular shocks. IX - The influence of PAH molecules on the ratio C/CO in dark clouds. Monthly Notices of the Royal Astronomical Society, 239, 741-750. https://doi.org/10.1093/mnras/239.3.741
• Shingal, R., Bransden, B., & Flower, D. (1989). Excitation and ionization in collisions between ground-state hydrogen atoms. Journal of Physics B: Atomic, Molecular and Optical Physics, 22, 855-862. https://doi.org/10.1088/0953-4075/22/6/011
• Pineau de Forets, G., Roueff, E., & Flower, D. (1989). Theoretical studies of interstellar molecular shocks. X - The chemical fractionation of deuterium in dark clouds. Monthly Notices of the Royal Astronomical Society, 240, 167-177. https://doi.org/10.1093/mnras/240.1.167
• Flower, D. (1989). Molecular collision processes in interstellar clouds. Physics Reports, 174, 1-66
• des Forets, G. P., Flower, D., & Dalgarno, A. (1988). Theoretical studies of interstellar molecular shocks. VIII - Polycyclic aromatic hydrocarbons in dark clouds. Monthly Notices of the Royal Astronomical Society, 235, 621-631. https://doi.org/10.1093/mnras/235.2.621
• Monteiro, T., Flower, D., Pineau des Forets, G., & Roueff, E. (1988). Theoretical studies of interstellar molecular shocks. VII - The photodissociation of molecular hydrogen. Monthly Notices of the Royal Astronomical Society, 234, 863-872. https://doi.org/10.1093/mnras/234.4.863
• Danby, G., Flower, D., Valiron, P., Schilke, P., & Walmsley, C. (1988). A recalibration of the interstellar ammonia thermometer. Monthly Notices of the Royal Astronomical Society, 235, 229-238. https://doi.org/10.1093/mnras/235.1.229
• Flower, D. (1988). Inelastic collisions between C(+) (2P) and H2. Journal of Physics B: Atomic, Molecular and Optical Physics, 21, L451-L453. https://doi.org/10.1088/0953-4075/21/15/006
• Forster, C., Shingal, R., Flower, D., Bransden, B., Dickinson, ,., & S., A. (1988). Total and differential cross sections for charge transfer in He(2+)-He(+) collisions - Trajectory effects. Journal of Physics B: Atomic, Molecular and Optical Physics, 21, 3941-3948. https://doi.org/10.1088/0953-4075/21/23/013
• Allan, R., Clegg, R., Dickinson, A., & Flower, D. (1988). Mg-H(+) charge transfer and MG line intensities in gaseous nebulae. Monthly Notices of the Royal Astronomical Society, 235, 1245-1255. https://doi.org/10.1093/mnras/235.4.1245
• Danby, G., Flower, D., & Monteiro, T. (1987). Rotationally inelastic collisions between H2 molecules in interstellar magnetohydrodynamical shocks. Monthly Notices of the Royal Astronomical Society, 226, 739-745. https://doi.org/10.1093/mnras/226.3.739
• Monteiro, T., & Flower, D. (1987). Excitation of O I and C I forbidden-line fine structure transitions by He and H2 - A neglected selection rule. Monthly Notices of the Royal Astronomical Society, 228, 101-107. https://doi.org/10.1093/mnras/228.1.101
• Danby, G., Flower, D., Valiron, P., Kochanski, E., Kurdi, L., & Diercksen, G. (1987). CORRIGENDUM: Rotational excitation of para-NH₃ by para-H₂. Journal of Physics B: Atomic, Molecular and Optical Physics, 20, 3937-
• Pineau des Forets, G., & Flower, D. (1987). Chemical evidence for ambipolar diffusion in interstellar shocks - A suggested observational test. Monthly Notices of the Royal Astronomical Society, 228, 1P-4P
• Dewangan, D., Flower, D., & Alexander, M. (1987). Rotational excitation of OH by para-H2:rate coefficients calculated in an intermediate coupling representation. Monthly Notices of the Royal Astronomical Society, 226, 505-512. https://doi.org/10.1093/mnras/226.3.505
• Pineau des Forets, G., Flower, D., Hartquist, T., Millar, ,., & J., T. (1987). Theoretical studies of interstellar molecular shocks. VI - The formation of molecules containing two or three carbon atoms. Monthly Notices of the Royal Astronomical Society, 227, 993-1011. https://doi.org/10.1093/mnras/227.4.993
• Danby, G., Flower, D., Valiron, P., Kochanski, E., & Kurdi, L. (1987). Rotational excitation of para-NH3 by para-H2. Journal of Physics B: Atomic, Molecular and Optical Physics, 20, 1039-1058
• Flower, D., & Pineau des Forets, G. (1987). Theoretical studies of interstellar molecular shocks. V - Solutions for J-type shocks as an initial value problem. Monthly Notices of the Royal Astronomical Society, 224, 403-411. https://doi.org/10.1093/mnras/224.2.403
• Shingal, R., Bransden, B., & Flower, D. (1987). Formation of H(2s) and H(2p) in collisions between ground-state hydrogen atoms. Journal of Physics B: Atomic, Molecular and Optical Physics, 20, L477-L480
• Pineau des Forets, G., Flower, D., Hartquist, T., & Dalgarno, A. (1986). Theoretical studies of interstellar molecular shocks. III - The formation of CH(+) in diffuse clouds. Monthly Notices of the Royal Astronomical Society, 220, 801-824. https://doi.org/10.1093/mnras/220.4.801
• Flower, D., & Pineau-Des-Forets, G. (1986). Multicomponent Reacting Magnetohydrodynamics Flows - a Reply. Monthly Notices of the Royal Astronomical Society, 220, 149-
• Allan, R., Shingal, R., & Flower, D. (1986). Charge transfer in H(+)-Na (3p) collisions - A possible ultraviolet laser mechanism. Journal of physics. B. Atomic and molecular physics, 19, L251-L256. https://doi.org/10.1088/0022-3700/19/7/007
• Shingal, R., Noble, C., Bransden, B., & Flower, D. (1986). Semiclassical calculations of charge exchange and excitation in Na⁺-Li and Li⁺-Na collisions using atomic-orbital expansions. Journal of physics. B. Atomic and molecular physics, 19, 3951-3964. https://doi.org/10.1088/0022-3700/19/23/014
• Dewangan, D., Flower, D., & Danby, G. (1986). Rotational excitation of OH by H2 - A comparison between theory and experiment. Journal of physics. B. Atomic and molecular physics, 19, L747-L753. https://doi.org/10.1088/0022-3700/19/21/005
• Pineau des Forets, G., Roueff, E., & Flower, D. (1986). Theoretical studies of interstellar molecular shocks. IV - The sulphur chemistry in diffuse clouds. Monthly Notices of the Royal Astronomical Society, 223, 743-756. https://doi.org/10.1093/mnras/223.4.743
• Danby, G., Flower, D., Kochanski, E., Kurdi, L., & Valiron, P. (1986). Rotational excitation of ortho-NH3 by para-H. Journal of physics. B. Atomic and molecular physics, 19, 2891-2906. https://doi.org/10.1088/0022-3700/19/18/019
• Flower, D., Pineau-Des-Forets, G., & Hartquist, T. (1986). Theoretical studies of interstellar molecular shocks. II - Molecular hydrogen cooling and rotational level populations. Monthly Notices of the Royal Astronomical Society, 218, 729-741. https://doi.org/10.1093/mnras/218.4.729
• Shingal, R., Bransden, B., Ermolaev, A., Flower, D., & Newby, C. (1986). Charge transfer in H(+)-Na(0) collisions - Atomic orbital calculations. Journal of physics. B. Atomic and molecular physics, 19, 309-320. https://doi.org/10.1088/0022-3700/19/3/014
• Flower, D., Pineau des Forets, G., & Hartquist, T. (1985). Theoretical studies of interstellar molecular shocks. I - General formulation and effects of the ion-molecule chemistry. Monthly Notices of the Royal Astronomical Society, 216, 775-794. https://doi.org/10.1093/mnras/216.4.775
• Flower, D., & Watt, G. (1985). Erratum - on the ORTHO-H2/PARA-H2 Ratio in Molecular Clouds. Monthly Notices of the Royal Astronomical Society, 213, 991-
• Dewangan, D., & Flower, D. (1985). Rotational excitation of OH by H2 - A clarification. Journal of physics. B. Atomic and molecular physics, 18, L137-L140. https://doi.org/10.1088/0022-3700/18/5/004
• Flower, D., & Launay, J. (1985). Rate coefficients for the rotational excitation of CO by ortho- and para-H2. Monthly Notices of the Royal Astronomical Society, 214, 271-277. https://doi.org/10.1093/mnras/214.3.271
• Shingal, R., Bransden, B., & Flower, D. (1985). Neutralisation in H(+) + H(-) collision. Journal of physics. B. Atomic and molecular physics, 18, 2485-2491. https://doi.org/10.1088/0022-3700/18/12/023
• Flower, D., Goharji, A., & Cohen, M. (1984). Ultraviolet spectra of planetary nebulae. X - Physical conditions in the compact planetary nebula SW ST 1. Monthly Notices of the Royal Astronomical Society, 206, 293-304. https://doi.org/10.1093/mnras/206.2.293
• Flower, D., & Pooley, G. (1984). Book-Review - Planetary Nebulae - I.A.U. Symposium NO.103. Observatory, 104, 110-
• Danby, G., & Flower, D. (1984). On the S₀(0) and S₁(0) spectra of the H₂-H₂ dimer. Journal of Physics B: Atomic, Molecular and Optical Physics, 17, L867-L870
• Flower, D., & Watt, G. (1984). On the ortho-H2/para-H2 ratio in molecular clouds. Monthly Notices of the Royal Astronomical Society, 209, 25-31. https://doi.org/10.1093/mnras/209.1.25
• Baker, D., & Flower, D. (1984). Vibrational relaxation in collisions between ¹²C¹⁶O and para-H₂. Journal of Physics B: Atomic, Molecular and Optical Physics, 17, L829-L831
• Flower, D., & Gathier, R. (1984). Book-Review - Planetary Nebulae. Space Science Reviews, 37, 401-
• Flower, D. (1984). Book-Review - Planetary Nebulae - I.A.U. Symposium NO.103
• Baker, D., & Flower, D. (1984). Near-resonance vibrational relaxation of (C-12)(O-16) in collisions with para-H2. Journal of physics. B. Atomic and molecular physics, 17, 3901-3912. https://doi.org/10.1088/0022-3700/17/19/013
• Baker, D., & Flower, D. (1984). Rovibrational excitation of (C-12)(O-16) by para-H2. Journal of physics. B. Atomic and molecular physics, 17, 119-130. https://doi.org/10.1088/0022-3700/17/1/017
• Flower, D., & Mayer, P. (1984). Book-Review - Planetary Nebulae - I.A.U. SYMP.103
• Flower, D. (1983). Book-Review - Planetary Nebulae - I.A.U. SYMP.103. Science, 222, 1010-
• Dewangan, D., & Flower, D. (1983). Rotational excitation of OH by H2 - Calculations in intermediate coupling. Journal of physics. B. Atomic and molecular physics, 16, 2157-2168. https://doi.org/10.1088/0022-3700/16/12/012
• Danby, G., & Flower, D. (1983). Theoretical studies of van der Waals molecules: the H₂-H₂ dimer. Journal of physics. B. Atomic and molecular physics, 16, 3411-3422. https://doi.org/10.1088/0022-3700/16/18/012
• Flower, D. (1983). Book-Review - Planetary Nebulae
• Flower, D., & Pineau Des Forets, G. (1983). The dissipation of shock waves in the outer solar atmosphere - A reappraisal. Astronomy and Astrophysics, 119, 321-323
• Baker, D., & Flower, D. (1983). Long-range forces in heavy particle scattering. Journal of physics. B. Atomic and molecular physics, 16, L515-L519. https://doi.org/10.1088/0022-3700/16/17/002
• Dewangan, D., & Flower, D. (1982). Collisional excitation of OH by H2 in the interstellar medium. Monthly Notices of the Royal Astronomical Society, 199, 457-463. https://doi.org/10.1093/mnras/199.3.457
• Flower, D. (1982). Ultraviolet spectra of planetary nebulae. VIII - The C/O abundance ratio in the Ring nebula. Monthly Notices of the Royal Astronomical Society, 199, 15P-18P. https://doi.org/10.1093/mnras/196.2.297
• Flower, D., & Kirkpatrick, D. (1982). Rovibrational excitation of molecular hydrogen in collisions with helium atoms. Journal of physics. B. Atomic and molecular physics, 15, 1701-1710. https://doi.org/10.1088/0022-3700/15/11/016
• Flower, D., Guilloteau, S., & Hartquist, T. (1982). OH cooling of interstellar shocks and masers. Monthly Notices of the Royal Astronomical Society, 200, 55P-59P. https://doi.org/10.1093/mnras/200.1.55p
• Flower, D., & Pineau-Des-Forets, G. (1982). Solar Emission Lines Produced in the Wake of a Shock Wave - Part Two - Line Profiles. Astronomy and Astrophysics, 110, 163-
• Flower, D., & Guilloteau, S. (1982). Pumping of H II/OH masers - IR line overlaps and collisional excitation by H2. Astronomy and Astrophysics, 114, 238-244
• Flower, D., Penn, C., & Seaton, M. (1982). Ultraviolet spectra of planetary nebulae. IX - High-dispersion observations of NGC 7662. Monthly Notices of the Royal Astronomical Society, 201, 39P-43P. https://doi.org/10.1093/mnras/201.1.39p
• Flower, D., & Kirkpatrick, D. (1982). Rovibrational excitation of molecular hydrogen by helium. Journal of Physics B: Atomic, Molecular and Optical Physics, 15, L11-L15
• Flower, D., & Penn, C. (1981). The ultraviolet spectrum of the planetary nebula NGC 6572. Monthly Notices of the Royal Astronomical Society, 194, 13P-16P. https://doi.org/10.1093/mnras/194.1.13p
• Flower, D., & Pineau Des Forets, G. (1981). Solar emission lines produced in the wake of a shock wave. I - The thermodynamic cycle. Astronomy and Astrophysics, 93, 347-352
• Dewangan, D., & Flower, D. (1981). Rotational excitation of OH by H2 at thermal energies. Journal of physics. B. Atomic and molecular physics, 14, 2179-2190. https://doi.org/10.1088/0022-3700/14/13/015
• Dickinson, A., & Flower, D. (1981). Electron Collisional Excitation of Interstellar Molecular Ions. Monthly Notices of the Royal Astronomical Society, 196, 297-
• Flower, D. (1981). Chemical Process in the Shocked Interseller Gas: Discussion. Philosophical Transactions of the Royal Society A: Mathematical, Physical and Engineering Sciences, 303, 521-522
• Dewangan, D., & Flower, D. (1981). Collisional excitation of OH by H2 - Transitions within the ground-state Lambda doublet. Journal of Physics B: Atomic, Molecular and Optical Physics, 14, L425-L429
• Clavel, J., Flower, D., & Seaton, M. (1981). Ultraviolet spectra of planetary nebulae. V - The C II lambda 1335 dielectronic recombination lines in IC 418. Monthly Notices of the Royal Astronomical Society, 197, 301-311. https://doi.org/10.1093/mnras/197.2.301
• Flower, D. (1980). Ultraviolet spectra of planetary nebulae. II - The young planetary nebula IC 4997. Monthly Notices of the Royal Astronomical Society, 193, 511-520. https://doi.org/10.1093/mnras/193.3.511
• Flower, D. (1980). Rotational excitation of OH by H2 at interstellar temperatures. Astronomy and Astrophysics, 83, 33-37
• Flower, D., & Perinotto, M. (1980). The absorption of He II LY alpha photons in planetary nebulae. Monthly Notices of the Royal Astronomical Society, 191, 301-308. https://doi.org/10.1093/mnras/191.2.301
• Clavel, J., & Flower, D. (1980). A search for absorption in the fourth positive system of CO in the spectrum of the planetary nebula IC 418. Monthly Notices of the Royal Astronomical Society, 190(1), 1P-4P. https://doi.org/10.1093/mnras/190.1.1p
• Flower, D., Nussbaumer, H., & Schild, H. (1979). The EUV spectra of young planetary nebulae. Astronomy and Astrophysics, 72, L1-L3
• Flower, D. (1979). Collisional pumping of a-doublet transitions in CH and OH by H₂ and He. Chemical Physics Letters, 67, 475-478. https://doi.org/10.1016/0009-2614%2879%2985208-2
• Flower, D., & Roueff, E. (1979). On the formation and destruction of HeH/+/ in gaseous nebulae and the associated infra-red emission line spectrum. Astronomy and Astrophysics, 72, 361-366
• Flower, D. (1979). Electron collisional excitation of rotational transitions in CH/+/ and HeH/+/. Astronomy and Astrophysics, 73, 237-239
• Flower, D., & Launay, J. (1977). Excitation of the fine-structure transition of C⁺ in collisions with molecular hydrogen. Journal of physics. B. Atomic and molecular physics, 10, L229-L233. https://doi.org/10.1088/0022-3700/10/6/009
• Flower, D. (1977). Excitation of the Fe XII spectrum in the solar corona. Astronomy and Astrophysics, 54, 163-166
• Flower, D. (1977). The dissipation of shock waves in the outer solar atmosphere. Astronomy and Astrophysics, 58, 185-188
• Flower, D., & Launay, J. (1977). Molecular collision processes. II - Excitation of the fine-structure transition of C/+/ in collisions with H2. Journal of physics. B. Atomic and molecular physics, 10, 3673-3681. https://doi.org/10.1088/0022-3700/10/18/024
• Flower, D. (1977). Atomic Data for the Coronal Ion Fe8~. Astronomy and Astrophysics, 56, 451-
• Flower, D. (1976). Theoretical predictions of the ultra-violet spectra of planetary nebulae. Memorie Della Società Astronomica Italiana, 47, 313-335
• Flower, D., & Pineau Des Forets, G. (1976). Shock wave heating of the outer solar atmosphere. Astronomy and Astrophysics, 52, 191-198
• Flower, D., & Nussbaumer, H. (1975). The Emission of Li-like Ions from the Solar Corona. Astronomy and Astrophysics, 39, 295-
• Flower, D., & Nussbaumer, H. (1975). On the extreme ultraviolet solar emission of B-like ions - O IV. Astronomy and Astrophysics, 45, 145-150
• Flower, D., & Nussbaumer, H. (1975). On the extreme ultraviolet solar emission of B-like ions - NA VII, SI X and S XII. Astronomy and Astrophysics, 45, 349-352
• Flower, D., & Nussbaumer, H. (1975). Relative intensities of solar emission lines of ions in the sodium isoelectronic sequence. Astronomy and Astrophysics, 42, 265-268
• Flower, D., & Pineau Des Forets, G. (1974). On the analysis of solar XUV observations and the structure of the chromosphere-corona transition region. Astronomy and Astrophysics, 37, 297-300
• Flower, D., & Nussbaumer, H. (1974). On the Extreme Ultraviolet Emission Spectrum of Fe xni. Astronomy and Astrophysics, 31, 353-
• Flower, D., & Launay, J. (1973). Electron Collisional Excitation of C+2. Astronomy and Astrophysics, 29, 321-
• Flower, D., & Pineau des Forets, G. (1973). Excitation of the Fe XIII Spectrum in the Solar Corona. Astronomy and Astrophysics, 24, 181-
• Flower, D. (1972). On the Interpretation of the Relative Intensities of the Solar XUV Lines of Ions in the Lithium Isoelectronic Sequence. Astronomy and Astrophysics, 17, 201-
• Flower, D., & Launay, J. (1972). On the validity of the distorted wave method in electron-atom collision theory. Journal of physics. B. Atomic and molecular physics, 5, L207-L210. https://doi.org/10.1088/0022-3700/5/10/004
• Magnant, F., Fort, B., & Flower, D. (1972). On the Significance of the Existence of Classes for Visible Coronal Lines. Astronomy and Astrophysics, 17, 403-
• Flower, D. (1972). On the Interpretation of the Relative Intensities of the Solar XUV Lines of Lithium-Like Ions. Space Science Reviews, 13, 738-
• Flower, D. (1971). Collision strengths for electron excitation of highly ionized, complex atoms. Journal of physics. B. Atomic and molecular physics, 4, 697-705. https://doi.org/10.1088/0022-3700/4/5/012
• Flower, D., & Jordan, C. (1971). On the Identffication of the A417 Line in the Solar Extreme Ultraviolet Spectrum. Astronomy and Astrophysics, 14, 473-
• Flower, D. (1969). The ionization structure of planetary nebulae-VII. The heavy elements. Monthly Notices of the Royal Astronomical Society, 146, 171-
• Flower, D., & Seaton, M. (1969). A program to calculate radiative recombination coefficients of hydrogenic ions. Computer Physics Communications, 1, 31-34. https://doi.org/10.1016/0010-4655%2869%2990016-2
• Flower, D. (1969). The ionization structure of planetary nebulae-VIII. Models of the nebulae NGC 7662 and IC 418. Monthly Notices of the Royal Astronomical Society, 146, 243-
• Flower, D., & Seaton, M. (1969). Forbidden line radiation from gaseous nebulae. Mémoires de la Societe Royale des Sciences de Liège (Imprimé), 17, 251-
• Flower, D. (1968). Computer Models of the Planetary Nebulae NGC 7662 and IC 418. Astrophysical Journal Letters, 2, 205-