The collapse of interstellar gas clouds. VI - Formation of molecular hydrogen and its effect on the collapse of spherically symmetrical interstellar gas clouds

Details The collapse of interstellar gas clouds. VI - Formation of molecular hydrogen and its effect on the collapse of spherically symmetrical interstellar gas clouds The collapse of interstellar gas clouds. VI - Formation of molecular hydrogen and its effect on the collapse of spherically symmetrical interstellar gas clouds

Sep 1980

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1980mnras.192..669b&link_type=abstract

Monthly Notices of the Royal Astronomical Society, vol. 192, Sept. 1980, p. 669-677.

Astronomy and Astrophysics

Astronomy

1

Chemical Evolution, Gravitational Collapse, Hydrogen Clouds, Interstellar Chemistry, Interstellar Gas, Chemical Reactions, Equations Of Motion, Radiative Transfer, Temperature Effects, Three Body Problem

Scientific paper

The effect of formation of molecular hydrogen on the collapse of spherically symmetrical interstellar gas cloud is computed. It is shown that:
(a) the volume dominated by molecular hydrogen accounts for 0.1 per cent of the total mass of the cloud;
(b) the volume shielded from (but not dominated by molecular hydrogen) the background radiation field responsible for the photo-dissociation of molecular hydrogen accounts for > 10 per cent of the total cloud mass;
(c) the formation of molecular hydrogen produces only marginal dynamical effects; and
(d) the presence of molecular hydrogen permits collapse to be maintained under conditions of adequate cooling for a longer period than if it were totally absent.

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