Molecular hydrogen in intercloud medium

Details Molecular hydrogen in intercloud medium Molecular hydrogen in intercloud medium

Jun 1977

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1977ap%26ss..49..217j&link_type=abstract

Astrophysics and Space Science, vol. 49, no. 1, June 1977, p. 217-227. Research supported by the Science Research Council of En

Astronomy and Astrophysics

Astrophysics

4

Astronomical Models, Chemisorption, Hydrogen Clouds, Interstellar Matter, Graphite, Hydrogen Ions, Tables (Data)

Scientific paper

The paper discusses the formation of molecular hydrogen on the surfaces of grains in a hot intercloud medium by the process of chemisorption of hydrogen atoms on graphite grains. It is suggested that the molecular hydrogen observed towards stars with low reddening may be located in the intercloud medium towards these stars. A comparison of the observed population distributions of H2 with theoretical calculations shows that the observations are in the main consistent with a gas kinetic temperature of the order of 8000 K and densities of about 0.1 to 1 per cu cm, parameters that are appropriate to the intercloud phase of the two-phase model of the interstellar medium.

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