Other
Scientific paper
Jun 2006
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2006aas...208.4919y&link_type=abstract
American Astronomical Society Meeting 208, #49.19; Bulletin of the American Astronomical Society, Vol. 38, p.128
Other
Scientific paper
Molecular hydrogen is the most abundant chemical species in the Universe and therefore plays a significant role in astrophysical environments such as starburst galaxies, interstellar molecular clouds, and star-forming regions. However, the scarcity of both accurate and complete data sets for rovibrational inelastic cross sections involving collisions with H2 has set a serious limitation on the development of reliable astrophysical models. In particular, the investigation of cooling processes, molecular emission, and non-equilibrium effects in molecular gaseous nebulae and other molecular environments requires collisional excitation data for H, He, and H2-impact on H2. To interpret these spectral lines, an accurate set of data for thousands of cross sections is needed, thus requiring large scale molecular physics computer codes to make extensive theoretical predictions. We summarize recent advances in calculations of these rates, their fitting with analytical approximations, and their incorporation into the astrophysical modeling code Cloudy.
Balakrishnan Naduvalath
Ferland Gary
Lee Taegweon
Schultz David
Stancil Philip
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