Retrieving physical conditions from interstellar H2 emission lines: a non linear fitting technique

Details Retrieving physical conditions from interstellar H2 emission lines: a non linear fitting technique Retrieving physical conditions from interstellar H2 emission lines: a non linear fitting technique

Jan 2005

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2005jphcs...6..191c&link_type=abstract

Journal of Physics: Conference Series, Volume 6, Issue 1, pp. 191-196 (2005).

Physics

3

Scientific paper

The importance of the formation pumping on the rovibrational level distribution of H2 is revisited. A detailed comparison of different formation mechanisms on dust surfaces and in the gas-phase is carried out, and it is found that dust surface formation dominates the formation pumping. It is shown that formation pumping in a cold gas can mimic the excitation conditions found in hotter regions. The presence of a significant fraction of molecular hydrogen in very high rotational levels observed towards OMC-1 Peak 1 is explained by means of pumping by newly formed H2 molecules and does not require high temperature gas.

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