Nucleosynthesis in Black-Hole-Forming Supernovae and Extremely Metal-Poor Stars
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概要
- 論文の詳細を見る
Stars more massive than 〜 20 - 25 M_<⊙> form a black hole at the end of their evolution. Stars with non-rotating black holes are likely to collapse "quietly" ejecting a small amount of heavy elements (Faint supernovae). In contrast, stars with rotating black holes are likely to give rise to very energetic supernovae (Hypernovae). We present distinct nucleosynthesis features of these two types of "black-hole-forming" supernovae. Nucleosynthesis in Hypernovae are characterized by larger abundance ratios (Zn,Co,V,Ti)/Fe and smaller (Mn,Cr)/Fe, which can explain the observed trend of these ratios in extremely metal-poor stars. Nucleosynthesis in Faint supernovae is characterized by a large amount of fall-back. We show that the abundance pattern of the recently discovered most Fe deficient star, HE0107-5240, and other extremely metal-poor carbon-rich stars are in good accord with those of black-hole-forming supernovae, but not pair-instability supernovae. This suggests that black-hole-forming supernovae made important contributions to the early Galactic (and cosmic) chemical evolution. Finally we discuss the nature of First (Pop III) Stars.
- 理論物理学刊行会の論文
- 2003-10-15
著者
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MAEDA Keiichi
Department of Earth Science and Astronomy, College of Arts and Science, University of Tokyo
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野本 憲一
Department Of Astronomy And Research Center For The Early Universe The University Of Tokyo
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Maeda K
Department Of Earth Science And Astronomy College Of Arts And Science University Of Tokyo
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Maeda Keiichi
Department Of Astronomy And Research Center For The Early Universe The University Of Tokyo
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Maeda Keiichi
Research Institute For Fundamental Physics Kyoto University
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UMEDA Hideyuki
Department of Astronomy, School of Science, The University of Tokyo
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DENG Jinsong
Department of Astronomy, University of Tokyo
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OHKUBO Takuya
Department of Astronomy, University of Tokyo
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MAZZALI Paolo
Osservatorio Astronomico, Via Tiepolo
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Deng Jinsong
Department Of Astronomy University Of Tokyo
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Mazzali Paolo
Osservatorio Astronomico Via Tiepolo
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Maeda Kei-ichi
Research Institute For Fundamental Physics Kyoto University
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Maeda Kei-ichi
Department Of Physics Waseda University
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Maeda Kei-ichi
Research Institute For Fundamental Physics Kyoto Unviersity
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Umeda Hideyuki
Department Of Astronomy School Of Science The University Of Tokyo
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Ohkubo Takuya
Department Of Astronomy University Of Tokyo
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Umeda Hideyuki
Department Of Astronomy Faculty Of Science The University Of Tokyo
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MAEDA Keiichi
Department of Astronomy, University of Tokyo
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NOMOTO Ken'ichi
Department of Astronomy, University of Tokyo
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NOMOTO Ken'Ichi
Department of Physics, Ibaraki University : NASA-Goddard Space Flight Center
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NOMOTO Ken'ichi
Department of Astronomy, University of Tokyo:Research Center for the Early Universe, University of Tokyo
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NOMOTO Ken'ichi
Department of Physics, Ibaraki University
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MAEDA Kei-ichi
Research Institute for Fundamental Physics, Kyoto Unviersity ./ Department of Physics, Kyoto University
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