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Evolution of Zero-Metal Clouds

Published online by Cambridge University Press:  04 August 2017

K. R. Villere  and
P. H. Bodenheimer
K. R. Villere
Affiliation:
Board of Studies in Astronomy and Astrophysics, University of California, Santa Cruz, CA, USA
P. H. Bodenheimer
Affiliation:
Board of Studies in Astronomy and Astrophysics, University of California, Santa Cruz, CA, USA

Abstract

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Dynamical, chemical and thermal evolution of zero-metal gas clouds has been modeled to study conditions of star formation in the early universe. Numerical results are shown for collapse of a spherical cloud of mass 5 × 105 M⊙. Cooling by H2 lines and by photons emitted in H + e- → H- + hν maintains collapse until formation of an equilibrium protostellar core with mass 0.03 M⊙. the cooling by photons produced with H- is essential for low-mass star formation. If the cloud is fragmented, the evolution of each piece resembles that of the parent cloud.

Type
Early Universe
Information
Symposium - International Astronomical Union , Volume 120: Astrochemistry , 1987 , pp. 121 - 122
Copyright
Copyright © Reidel 1987 

References

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