Prompt Iron Enrichment, Two r-Process Components, and Abundances in Very Metal-Poor Stars

Details Prompt Iron Enrichment, Two r-Process Components, and Abundances in Very Metal-Poor Stars Prompt Iron Enrichment, Two r-Process Components, and Abundances in Very Metal-Poor Stars

1999-11-30

arxiv.org/abs/astro-ph/9911526v1

Astrophys.J. 529 (2000) L21-L24

Astronomy and Astrophysics

Astrophysics

5 pages, 2 postscript figures, to appear in ApJL

Scientific paper

10.1086/312455

We present a model to explain the wide range of abundances for heavy r-process elements (mass number A > 130) at low [Fe/H]. This model requires rapid star formation and/or an initial population of supermassive stars in the earliest condensed clots of matter to provide a prompt or initial Fe inventory. Subsequent Fe and r-process enrichment was provided by two types of supernovae: one producing heavy r-elements with no Fe on a rather short timescale and the other producing light r-elements (A < or = 130) with Fe on a much longer timescale.

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