Strange quark star in dilaton gravity

被引：1

作者：

Peivand, Alireza ^{[1
]}

Naficy, Kazem ^{[1
]}

Bordbar, Gholam Hossein ^{[2
,3
,4
]}

机构：

[1] Univ Birjand, Dept Phys, POB 615-97175, Birjand, South Khorasan, Iran

[2] Shiraz Univ, Dept Phys, Shiraz 71454, Iran

[3] Res Inst Astron & Astrophys Maragha, POB 55134-441, Maragha, Iran

[4] Univ Waterloo, Dept Phys & Astron, 200 Univ Ave West, Waterloo, ON N2L 3G1, Canada

来源：

RESEARCH IN ASTRONOMY AND ASTROPHYSICS | 2019年 / 19卷 / 06期

关键词：

dense matter; equation of state; gravitation; stars: fundamental parameters (Masses; radii); EINSTEINS FIELD-EQUATIONS; NEUTRON-STAR; OBSERVATIONAL EVIDENCE; STATIC SOLUTIONS; MODEL; SUPERNOVAE; DENSITY; PULSARS; MATTER; MASS;

D O I：

10.1088/1674-4527/19/6/78

中图分类号：

P1 [天文学];

学科分类号：

0704 ;

摘要：

In this work, we first obtain the hydrostatic equilibrium equation in dilaton gravity. Then, we examine some of the structural characteristics of a strange quark star in dilaton gravity in the context of Einstein gravity. We show that the variations of dilaton parameter do not affect the maximum mass, but variations in the cosmological constant lead to changes in the structural characteristics of the quark star. We investigate the stability of strange quark stars by applying the MIT bag model with dilaton gravity. We also provide limiting values for the dilaton field parameter and cosmological constant. We also study the effects of dilaton gravity on the other properties of a quark star such as the mean density and gravitational redshift. We conclude that the last reported value for the cosmological constant does not affect the maximum mass of a strange quark star.

引用

页数：14

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