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Explosion of very massive stars and the origin of intermediate mass black holes

Published online by Cambridge University Press:  01 August 2006

Sachiko Tsuruta ,
Takuya Ohkubo ,
Hideyuki Umeda ,
Keiichi Maeda ,
Ken'ichi Nomoto ,
Tomoharu Suzuki  and
Martin J. Rees
Sachiko Tsuruta
Affiliation:
Department of Physics, Montana State University, Bozeman, MT 59717, USA email: uphst@gemini.msu.montana.edu
Takuya Ohkubo
Affiliation:
Department of Astronomy, Univ. of Tokyo, Hongo, Bunkyo-ku, Tokyo, Japan email: ohkubo@astron.s.u-tokyo.ac.jp, umeda@astron.s.u-tokyo.ac.jp, suzuki@astron.s.u-tokyo.ac.jp
Hideyuki Umeda
Affiliation:
Department of Astronomy, Univ. of Tokyo, Hongo, Bunkyo-ku, Tokyo, Japan email: ohkubo@astron.s.u-tokyo.ac.jp, umeda@astron.s.u-tokyo.ac.jp, suzuki@astron.s.u-tokyo.ac.jp
Keiichi Maeda
Affiliation:
Department of Earth Sci. and Astron., Univ. of Tokyo, Komaba, Meguro-ku, Tokyo, Japan email: maeda@esa.c.u-tokyo.ac.jp
Ken'ichi Nomoto
Affiliation:
Department of Astronomy, Univ. of Tokyo, Hongo, Bunkyo-ku, Tokyo, Japan email: ohkubo@astron.s.u-tokyo.ac.jp, umeda@astron.s.u-tokyo.ac.jp, suzuki@astron.s.u-tokyo.ac.jp Research Center for the Early Universe, Univ. of Tokyo, Hongo, Bunkyo-ku, Tokyo, Japan email: nomoto@astron.s.u-tokyo.ac.jp
Tomoharu Suzuki
Affiliation:
Department of Astronomy, Univ. of Tokyo, Hongo, Bunkyo-ku, Tokyo, Japan email: ohkubo@astron.s.u-tokyo.ac.jp, umeda@astron.s.u-tokyo.ac.jp, suzuki@astron.s.u-tokyo.ac.jp
Martin J. Rees
Affiliation:
Institute of Astronomy, University of Cambridge, Madingley Road, Cambridge CB3 0HA, UK email: mjr@ast.cam.ac.uk
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Abstract

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We calculate evolution, collapse, explosion, and nucleosynthesis of Population III very massive stars with 500 M⊙ and 1000 M⊙. It was found that both 500 M⊙ and 1000 M⊙ models enter the region of pair-instability but continue to undergo core collapse to black holes. For moderately aspherical explosions, the patterns of nucleosynthesis match the observational data of intergalactic and intercluster medium and hot gases in M82, better than models involving hypernovae and pair instability supernovae.

Our results suggest that explosions of Population III core-collapse very massive stars contribute significantly to the chemical evolution of gases in clusters of galaxies. The final black hole masses are about 500 M⊙ for our most massive 1000 M⊙ models. This result may support the view that Population III very massive stars are responsible for the origin of intermediate mass black holes which were recently reported to be discovered.

Type
Contributed Papers
Information
Proceedings of the International Astronomical Union , Volume 2 , Symposium S238: Black Holes from Stars to Galaxies – Across the Range of Masses , August 2006 , pp. 241 - 246
Copyright
Copyright © International Astronomical Union 2007

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