| 1 Interstellar molecules 1.1 Introduction 1.2 Chemistry in interstellar clouds 1.3 Chemical bistability in dense clouds 2 Interstellar shocks and chemistry 2.1 Introduction 2.2 The MHD conservation equations 2.3 The structure of interstellar shock waves 2.4 Shock waves in dark clouds 2.5 Shock waves in diffuse clouds 3 The primordial gas 3.1 Introduction 3.2 The governing equations 3.3 The role of molecules 3.4 Chemistry 3.5 Gravitational collapse 4 The rotational excitation of molecules 4.1 Introduction 4.2 The Born-Oppenheimer approximation 4.3 The scattering of an atom by a rigid rotator 4.4 The rotational excitation of non-linear molecules 5 The vibrational excitation of linear molecules 5.1 Introduction 5.2 The scattering of an atom by a vibrating rotor 5.3 Excitation of H2 and HD in collisions with H2 molecules 5.4 Cooling functions 6 The excitation of fine structure transitions 6.1 Introduction 6.2 Theory of fine structure excitation processes 7 Radiative transfer in molecular lines 7.1 Introduction 7.2 The radiative transfer equation 7.3 The OH radical 7.4 Producing population inversion 7.5 Rotational excitation of OH by H2 8 Charge transfer processes 8.1 Introduction 8.2 The Landau-Zener model 8.3 The 'orbiting' model 8.4 The quantum mechanical model 8.5 Selective population of excited states 9 Electron collisions 9.1 Introduction 9.2 Selection rules and LS-coupling 9.3 Electron collisional excitation 9.4 Resonances 9.5 Forbidden line emission from Herbig-Haro objects 10 Photon collisions 10.1 Introduction 10.2 The oscillator strength 10.3 The transition probability 10.4 Photoionization and radiative recombination 10.5 Radiative transitions in molecules Appendix 1 The atomic system of units Appendix 2 Reaction rate coefficients References Index |
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