The First generation of stars: First steps towards chemical evolution of galaxies - INSPIRE

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The First generation of stars: First steps towards chemical evolution of galaxies

Aug, 1995

7 pages

Published in:

Astrophys.J.Lett. 451 (1995) L49

e-Print:

astro-ph/9508040 [astro-ph]

DOI:

10.1086/309687

Report number:

CFPA-TH-95-15

View in:

ADS Abstract Service

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Abstract: (arXiv)

We argue that extreme metal-poor stars show a high dispersion in metallicity, because their abundances are the outcome of very few supernova events. Abundance anomalies should appear because of the discrete range of progenitor masses. There is a natural metallicity threshold of

Z/Z_\odot\sim 10^{-4}

below which one would expect to find very few, if any, halo stars. Similar reasoning is applied to lower mass systems, such as metal-poor compact blue galaxies and Lyman alpha absorption line clouds seen towards high redshift quasars, where a somewhat higher threshold is inferred.

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