Pop III Hypernova Nucleosynthesis and Abundances in Very Metal-Poor Halo Stars

Details Pop III Hypernova Nucleosynthesis and Abundances in Very Metal-Poor Halo Stars Pop III Hypernova Nucleosynthesis and Abundances in Very Metal-Poor Halo Stars

2002-05-22

arxiv.org/abs/astro-ph/0205365v1

Astronomy and Astrophysics

Astrophysics

4 pages, 4 Fig, in Proc. 11th Workshop on Nuclear Astrophysics, p.164, ed. W. Hillebrand & E. Muller (Max-Planck-Institut fur

Scientific paper

We calculate evolution and nucleosynthesis in massive Pop III stars with M = 13 ~ 270Msun, and compare the results with abundances of very metal-poor halo stars. The observed abundances can be explained by the energetic core-collapse supernovae with M < ~ 130Msun (``hypernovae'') but not by pair-instability supernovae (PISNe) with M ~ 140-270 Msun. This result constrain the IMF for the Pop III and very metal-poor Pop II stars.

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