Tsuyoshi Miyatsu
Soongsil University
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Publication
Featured researches published by Tsuyoshi Miyatsu.
The Astrophysical Journal | 2013
Tsuyoshi Miyatsu; Sachiko Yamamuro; Ken'ichiro Nakazato
The equation of state for neutron stars in a wide-density range at zero temperature is constructed. The chiral quark-meson coupling model within relativistic Hartree-Fock approximation is adopted for uniform nuclear matter. The coupling constants are determined so as to reproduce the experimental data of atomic nuclei and hypernuclei. In the crust region, nuclei are taken into account within the Thomas-Fermi calculation. All octet baryons are considered in the core region, while only Ξ– appears in neutron stars. The resultant maximum mass of neutron stars is 1.95 M ☉, which is consistent with the constraint from the recently observed massive pulsar, PSR J1614-2230.
Physical Review C | 2013
Tsuyoshi Miyatsu; Myung-Ki Cheoun; Koichi Saito; J-Parc Branch
Using several relativistic mean field models (such as GM1, GM3, NL3, TM1, FSUGold and IU-FSU) as well as the quark-meson coupling model, we calculate the particle fractions, the equation of state, the maximum mass and radius of a neutron star within relativistic Hartree approximation. In determining the couplings of the isoscalar, vector mesons to the octet baryons, we examine the extension of SU(6) spin-flavor symmetry to SU(3) flavor symmetry. Furthermore, we consider the strange (
Astrophysical Journal Supplement Series | 2012
Tetsuya Katayama; Tsuyoshi Miyatsu; Koichi Saito
\sigma^{\ast}
Physics Letters B | 2012
Tsuyoshi Miyatsu; Tetsuya Katayama; Koichi Saito
and
The Astrophysical Journal | 2015
Tsuyoshi Miyatsu; Myung-Ki Cheoun; Koichi Saito
\phi
Physics Letters B | 2008
S. Nagai; Tsuyoshi Miyatsu; Kenji Saito; Kazuo Tsushima
) mesons, and study how they affect the equation of state. We find that the equation of state in SU(3) symmetry can sustain a neutron star with mass of
Progress of Theoretical Physics | 2009
Tsuyoshi Miyatsu; Koichi Saito
(1.8 \sim 2.1) M_{\odot}
arXiv: Nuclear Theory | 2014
Tsuyoshi Miyatsu; Myung-Ki Cheoun; Koichi Saito
even if hyperons exist inside the core. In addition, the strange vector (
Few-body Systems | 2013
Tsuyoshi Miyatsu; Koichi Saito
\phi
Proceedings of The 26th International Nuclear Physics Conference — PoS(INPC2016) | 2017
Tsuyoshi Miyatsu; Takahide Kambe; Koichi Saito
) meson and the variation of baryon structure in matter also play important roles in supporting a massive neutron star.
