Impact of quarks and pions on dynamics and neutrino signal of black hole formation in non-rotating stellar core collapse

Ken'ichiro Nakazato, Kohsuke Sumiyoshi, Shoichi Yamada

研究成果: ジャーナルへの寄稿記事

32 引用 (Scopus)

抄録

In the formation process of black holes, the density and temperature of matter become sufficiently high for quarks and pions to appear. In this study, we numerically investigate stellar core collapse and black hole formation taking into account the equations of state involving quarks and/or pions. In our simulations, we utilize a code that solves the general relativistic hydrodynamics and neutrino transfer equations simultaneously, treating neutrino reactions in detail under spherical symmetry. Initial models with three different masses, namely, 40, 100, and 375M, are adopted. Our results show that quarks and pions shorten the duration of neutrino emission if the collapse bounces before black hole formation. In addition, pions increase the luminosity and average energy of neutrinos before black hole formation. We also find that the hadron-quark phase transition leads to an interesting evolution of temperature. Moreover, the neutrino event number is evaluated for the currently operating neutrino detector, SuperKamiokande, to confirm that it is not only detectable but also affected by the emergence of quarks and pions for Galactic events. While there are some issues, such as hyperons, beyond the scope of this study, this is the first serious attempt to assess the impact of quarks and pions in dynamical simulations of black hole formation and will serve as an important foundation for future studies.

元の言語英語
ページ(範囲)1284-1294
ページ数11
ジャーナルAstrophysical Journal
721
発行部数2
DOI
出版物ステータス出版済み - 10 1 2010

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stellar cores
pions
neutrinos
quarks
phase transition
equation of state
simulation
symmetry
temperature
hydrodynamics
energy
hyperons
equations of state
luminosity
detectors
code
detector

All Science Journal Classification (ASJC) codes

  • Astronomy and Astrophysics
  • Space and Planetary Science

これを引用

Impact of quarks and pions on dynamics and neutrino signal of black hole formation in non-rotating stellar core collapse. / Nakazato, Ken'ichiro; Sumiyoshi, Kohsuke; Yamada, Shoichi.

:: Astrophysical Journal, 巻 721, 番号 2, 01.10.2010, p. 1284-1294.

研究成果: ジャーナルへの寄稿記事

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