The Minimum Stellar Mass in Early Galaxies

Details The Minimum Stellar Mass in Early Galaxies The Minimum Stellar Mass in Early Galaxies

2005-06-30

arxiv.org/abs/astro-ph/0506752v1

Astron.Rep. 49 (2005) 587

Astronomy and Astrophysics

Astrophysics

18 pages, 7 figures

Scientific paper

The conditions for the fragmentation of the baryonic component during merging of dark matter halos in the early Universe are studied. We assume that the baryonic component undergoes a shock compression. The characteristic masses of protostellar molecular clouds and the minimum masses of protostars formed in these clouds decrease with increasing halo mass. This may indicate that the initial stellar mass function in more massive galaxies was shifted towards lower masses during the initial stages of their formation. This would result in an increase of the number of stars per unit halo mass, i.e., the efficiency of star formation.

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