Astronomy and Astrophysics – Astrophysics
Scientific paper
Jul 1980
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1980apj...239..417t&link_type=abstract
Astrophysical Journal, Part 1, vol. 239, July 15, 1980, p. 417-427.
Astronomy and Astrophysics
Astrophysics
57
Cosmic Gases, Galactic Evolution, Globular Clusters, Gravitational Effects, Stellar Evolution, Stellar Models, Cosmology, Elliptical Galaxies, Fragmentation, Free Fall, Jeans Theory, Stellar Mass
Scientific paper
The paper demonstrates that clouds collapsing from configurations near the Jeans limit are not susceptible to gravitational fragmentation on a free-fall time scale. Time scale arguments show that the self-gravity of perturbations alone cannot drive the fragmentation process to completion in a single free-fall time. A reevaluation of the fragmentation process in primordial gas clouds was made because of objections to models of 'opacity limited star formation' due to its inability of predicting a lower mass limit to stars which form in a dynamically collapsing gas cloud. It was concluded that: (1) stars formed during the first free-fall time after the time of recombination in the early universe had solar masses of at least 1500 M, and (2) dissipationless collapse models probably do not accurately picture the manner in which globular clusters and elliptical galaxies formed.
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