GW190814: Circumstantial evidence for up-down quark star

被引：20

作者：

Cao, Zheng ^{[1
,2
]}

Chen, Lie-Wen ^{[1
,2
]}

Chu, Peng-Cheng ^{[3
]}

Zhou, Ying ^{[1
,2
]}

机构：

[1] Shanghai Jiao Tong Univ, Sch Phys & Astron, Shanghai Key Lab Particle Phys & Cosmol, Shanghai 200240, Peoples R China

[2] Shanghai Jiao Tong Univ, Key Lab Particle Astrophys & Cosmol MOE, Shanghai 200240, Peoples R China

[3] Qingdao Univ Technol, Sch Sci, Qingdao 266000, Peoples R China

来源：

PHYSICAL REVIEW D | 2022年 / 106卷 / 08期

基金：

中国国家自然科学基金;

关键词：

NEUTRON-STAR; MASS-DISTRIBUTION; STRANGE STARS; MODEL; QCD; REMNANT; RADIUS; MATTER;

D O I：

10.1103/PhysRevD.106.083007

中图分类号：

P1 [天文学];

学科分类号：

0704 ;

摘要：

Within a confining quark matter model which considers phenomenologically the quark confinement and asymptotic freedom as well as the chiral symmetry restoration and quark deconfinement at high baryon density, we find that if the up-down quark matter (udQM) is more stable than nuclear matter and strange quark matter (SQM), the maximum mass of static quark stars with udQM is 2.87 M-circle dot under agreement with both the constraints on star tidal deformability from gravitational wave signal GW170817 and the massradius of PSR J0030 thorn 0451 and PSR J0740 thorn 6620 measured by NICER. In contrast, the conventional strange quark star with the SQM that is more stable than nuclear matter while the nuclear matter is more stable than udQM, has a maximum static mass of only 1.87 M-circle dot and its radius significantly deviates from NICER's constraint. Our results thus provide circumstantial evidence suggesting the recently reported GW190814's secondary component with a mass of 2.59(-0.09)(+0.08) M-circle dot could be an up-down quark star.

引用

页数：7

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