Twin stars within the SU(3) chiral quark-meson model

被引：32

作者：

Zacchi, Andreas ^{[1
]}

Tolos, Laura ^{[2
,3
]}

Schaffner-Bielich, Juergen ^{[1
]}

机构：

[1] Goethe Univ Frankfurt, Inst Theoret Phys, Max von Laue Str 1, D-60438 Frankfurt, Germany

[2] Inst Ciencies Espai IEEC CSIC, Campus Univ Autonoma Barcelona, Bellaterra 08193, Spain

[3] Goethe Univ Frankfurt, Frankfurt Inst Adv Studies, Ruth Moufang Str 1, D-60438 Frankfurt, Germany

来源：

PHYSICAL REVIEW D | 2017年 / 95卷 / 10期

关键词：

EQUATION-OF-STATE; MASS;

D O I：

10.1103/PhysRevD.95.103008

中图分类号：

P1 [天文学];

学科分类号：

0704 ;

摘要：

We present new stable solutions of the Tolman-Oppenheimer-Volkoff equations for quark stars using a quark matter equation of state based on the SU(3) quark-meson model that exhibits the onset of the chiral phase transition. These new solutions appear as two stable branches in the mass-radius relation allowing for so-called twin stars, i.e., two stable quark star solutions with the same mass, but distinctly different radii. We find solutions which are compatible with causality, the stability conditions of dense matter, the astrophysical constraints of the rotation of the millisecond pulsar PSR J1748-2446ad and the 2M(circle dot) pulsar mass constraint.

引用

页数：7

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