David Flower is a Professor of Physics at the University of Durham, UK. He is a Fellow of the Royal Astronomical Society and an Editor of the Society's astronomy research journal, Monthly Notices. His research interests include atomic and molecular physics in astrophysical environments, and the physics of the interstellar medium.

• 1. Interstellar molecules; 2. Interstellar shocks and chemistry; 3. The primordial gas; 4. The rotational excitation of molecules; 5. The vibrational excitation of linear molecules; 6. The excitation of fine structure transitions; 7. Radiative transfer in molecular lines; 8. Charge transfer processes; 9. Electron collisions; 10. Photon collisions; Appendix 1. The atomic system of units; Appendix 2. Reaction rate coefficients; Bibliography; Index.

David Flower is a Professor of Physics at the University of Durham, UK. He is a Fellow of the Royal Astronomical Society and an Editor of the Society's astronomy research journal, Monthly Notices. His research interests include atomic and molecular physics in astrophysical environments, and the physics of the interstellar medium.

• 1. Interstellar molecules; 2. Interstellar shocks and chemistry; 3. The primordial gas; 4. The rotational excitation of molecules; 5. The vibrational excitation of linear molecules; 6. The excitation of fine structure transitions; 7. Radiative transfer in molecular lines; 8. Charge transfer processes; 9. Electron collisions; 10. Photon collisions; Appendix 1. The atomic system of units; Appendix 2. Reaction rate coefficients; Bibliography; Index.