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Stellar Core Collapse and Exotic Matter

Published online by Cambridge University Press:  05 September 2012

Ken'ichiro Nakazato  and
Kohsuke Sumiyoshi
Ken'ichiro Nakazato
Affiliation:
Department of Physics, Faculty of Science & Technology, Tokyo University of Science, Yamazaki 2641, Noda, Chiba 278-8510, Japan email: nakazato@rs.tus.ac.jp
Kohsuke Sumiyoshi
Affiliation:
Numazu College of Technology, Ooka 3600, Numazu, Shizuoka 410-8501, Japan
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Abstract

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Some supernovae and gamma-ray bursts are thought to accompany a black hole formation. In the process of a black hole formation, a central core becomes hot and dense enough for hyperons and quarks to appear. In this study, we perform neutrino-radiation hydrodynamical simulations of a stellar core collapse and black hole formation taking into account such exotic components. In our computation, general relativity is fully considered under spherical symmetry. As a result, we find that the additional degrees of freedom soften the equation of state of matter and promote the black hole formation. Furthermore, their effects are detectable as a neutrino signal. We believe that the properties of hot and dense matter at extreme conditions are essential for the studies on the astrophysical black hole formation. This study will be hopefully a first step toward a physics of the central engine of gamma-ray bursts.

Keywords

black hole physicsdense matterequation of statehydrodynamics
Type
Poster Papers
Information
Proceedings of the International Astronomical Union , Volume 7 , Symposium S279: Death of Massive Stars: Supernovae and Gamma-Ray Bursts , April 2011 , pp. 367 - 368
Copyright
Copyright © International Astronomical Union 2012

References

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