Cooling by grains and H2 in collapsing clouds of different metallicities

Details Cooling by grains and H2 in collapsing clouds of different metallicities Cooling by grains and H2 in collapsing clouds of different metallicities

Mar 1994

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1994ap%26ss.213..113r&link_type=abstract

Astrophysics and Space Science (ISSN 0004-640X), vol. 213, no. 1, p. 113-119

Statistics

Computation

Collapse, Computation, Cooling, Granular Materials, Hydrogen, Metallicity, Molecular Clouds, Density (Mass/Volume), Fragmentation, Gravitation, Isothermal Processes, Temperature

Scientific paper

Computations of the cooling by grains and by H2 molecules are carried out and applied to different stages of cloud collapse during the isothermal phase. Clouds of 10 6 solar mass of different metallicites are considered, with the purpose of obtaining a relation between metallicity and importance of grain cooling relative to H2 cooling. Our results show that grain cooling dominates over H2 cooling for metallicities (M/H) greater than -4.0, in the absence of external UV field.

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