On the Contraction of Protostellar Clouds with Different Metallicities |
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| Authors: | Kazuyuki Omukai |
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| Institution: | (1) Department of Physics, Kyoto University, Kyoto 606-8502, Japan |
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| Abstract: | We examine the thermal and chemical evolution of gravitationally collapsing protostellar clouds with metallicity 0≤Z/Z
⊙≤1.During the first collapse stage, the temperatures are higher for lower metallicity clouds. However, in the course of the
adiabatic contraction of transient cores, the evolutionary trajectories of the clouds converge to a curve that is determined
only by fundamental physical constants. The trajectories coincide each other thereafter. The size of the stellar core at formation
is the same regardless of metallicity.
This revised version was published online in July 2006 with corrections to the Cover Date. |
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