Neutron Stars in f(R)-Gravity and Its Extension with a Scalar Axion Field

被引：7
作者：
Astashenok, Artyom [1 ]
Odintsov, Sergey [2 ,3 ,4 ]
机构：
[1] Immanuel Kant Balt Fed Univ, Inst Phys, Math & IT, Nevskogo Str 14, Kaliningrad 236041, Russia
[2] ICREA, Passeig Luis Co 23, Barcelona 08010, Spain
[3] CSIC, Inst Space Sci IEEC, C Can Magrans S-N, Barcelona 08193, Spain
[4] TUSUR, Int Lab Theoret Cosmol, Tomsk 634050, Russia
来源：
PARTICLES | 2020年 / 3卷 / 03期
关键词：
neutron stars; modified gravity; axions; MODIFIED GRAVITY; DARK-MATTER; MODULATION; LAMBDA;
D O I：
10.3390/particles3030036
中图分类号：
P1 [天文学];
学科分类号：
0704 ;
摘要：
We present a brief review of general results about non-rotating neutron stars in simple R-2 gravity and its extension with a scalar axion field. Modified Einstein equations are presented for metrics in isotropical coordinates. The mass-radius relation, mass profile and dependence of mass from central density on various equations of state are given in comparison to general relativity.
引用
收藏
页码：532 / 542
页数：11
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