Two-solar-mass hybrid stars: A two model description using the Nambu-Jona-Lasinio quark model

被引：49

作者：

Pereira, Renan Camara ^{[1
]}

Costa, Pedro ^{[1
]}

Providencia, Constanca ^{[1
]}

机构：

[1] Univ Coimbra, Dept Phys, CFisUC, P-3004516 Coimbra, Portugal

来源：

PHYSICAL REVIEW D | 2016年 / 94卷 / 09期

关键词：

EQUATION-OF-STATE; NEUTRON-STARS; VECTOR INTERACTION; MATTER; RADIUS; DECONFINEMENT; MASS; QCD;

D O I：

10.1103/PhysRevD.94.094001

中图分类号：

P1 [天文学];

学科分类号：

0704 ;

摘要：

Hybrid stars with a quark phase described by the Nambu-Jona-Lasinio model are studied. The hadron-quark model used to determine the stellar matter equation of state favors the appearance of quark matter: the coincidence of the deconfinement and chiral transitions and a low vacuum constituent quark mass. These two properties are essential to build equations of state that predict pure quark matter in the center of neutron stars. The effect of vector-isoscalar and vector-isovector terms is discussed, and it is shown that the vector-isoscalar terms are necessary to describe 2 M-circle dot. hybrid stars, and the vector-isovector terms result in larger quark cores and a smaller deconfinement density.

引用

页数：16

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