Collisional excitation of H-2 by grains in C-type shocks

Citation
Gp. Des Forets et al., Collisional excitation of H-2 by grains in C-type shocks, M NOT R AST, 323(1), 2001, pp. L7-L11
Citations number
17
Language
INGLESE
art.tipo
Article
Categorie Soggetti
Space Sciences
Journal title
MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY
ISSN journal
0035-8711 → ACNP
Volume
323
Issue
1
Year of publication
2001
Pages
L7 - L11
Database
ISI
SICI code
0035-8711(20010501)323:1<L7:CEOHBG>2.0.ZU;2-0
Abstract
We have performed classical trajectory Monte Carlo calculations of the prob abilities of rovibrational excitation and dissociation of molecular hydroge n in collisions with a surface, modelled as MgO. The results show that, in C-type shock waves, states of high excitation energy are populated predomin antly in collisions with charged grains, rather than with much more abundan t neutral species. The intensities of rovibrational transitions of H-2 have been calculated for a series of models of C-type shocks, considered to be relevant to molecular outflow sources. We compare the column densities of e xcited states of H-2 and the intensities of representative rovibrational tr ansitions, calculated excluding and including collisions with grains.