IMPACT OF QUARKS AND PIONS ON DYNAMICS AND NEUTRINO SIGNAL OF BLACK HOLE FORMATION IN NON-ROTATING STELLAR CORE COLLAPSE

Journal Article · Fri Oct 01 00:00:00 EDT 2010 · Astrophysical Journal

DOI:https://doi.org/10.1088/0004-637X/721/2/1284· OSTI ID:21464793

Nakazato, Ken'ichiro ^[1]; Sumiyoshi, Kohsuke ^[2]; Yamada, Shoichi ^[3]

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1. Department of Astronomy, Kyoto University, Kita-shirakawa Oiwake-cho, Sakyo, Kyoto 606-8502 (Japan)
2. Numazu College of Technology, Ooka 3600, Numazu, Shizuoka 410-8501 (Japan)
3. Department of Physics, Waseda University, 3-4-1 Okubo, Shinjuku, Tokyo 169-8555 (Japan)

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 375 M{sub sun}, 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.

• OSTI ID: 21464793
• Journal Information: Astrophysical Journal, Vol. 721, Issue 2; Other Information: DOI: 10.1088/0004-637X/721/2/1284; ISSN 0004-637X
• Country of Publication: United States
• Language: English

Related Subjects

72 PHYSICS OF ELEMENTARY PARTICLES AND FIELDS
79 ASTROPHYSICS
COSMOLOGY AND ASTRONOMY
BLACK HOLES
EQUATIONS OF STATE
GALACTIC EVOLUTION
HYDRODYNAMICS
HYPERONS
NEUTRINO REACTIONS
NEUTRINOS
PIONS
QUARKS
RELATIVISTIC RANGE
BARYONS
BOSONS
ELEMENTARY PARTICLES
ENERGY RANGE
EQUATIONS
EVOLUTION
FERMIONS
FLUID MECHANICS
HADRONS
LEPTON REACTIONS
LEPTONS
MASSLESS PARTICLES
MECHANICS
MESONS
NUCLEAR REACTIONS
PSEUDOSCALAR MESONS
STRANGE PARTICLES