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Rotational and Vibrational Excitation of CO Molecules by Collisions with 4 He Atoms
(IOP Publishing, 2002)
Full close-coupled calculations are carried out of the cross sections for energy transfer between rotational levels of carbon monoxide in collision with 4He atoms with energies between 5 and 600 cm-1. At low energies, the ...
H3+ in Diffuse Interstellar Gas
(Oxford University Press (OUP), 2000)
A model is constructed of the material in front of the star Cygnus OB2 no. 12 in which dense cores are embedded in diffuse clumps of gas. The model reproduces the measured abundances of Graphic C2 and CO, and predicts a ...
H2 excitation in turbulent interstellar clouds
(Oxford University Press (OUP), 2005)
We discuss the observational differences between lines of sight that intercept a group of turbulent dissipative structures and lines of sight that cross less-active regions. Using time-dependent calculations we show that ...
C2absorption-line diagnostics of diffuse interstellar clouds
(Oxford University Press (OUP), 2002)
The excitation of the diatomic carbon molecule in diffuse interstellar clouds is discussed for a cloud with large density fluctuations of small linear filling factor along the line of sight. Possible implications for the ...