Neutron star solutions with curvature induced scalarization in the extended Gauss-Bonnet scalar-tensor theories

被引：58
作者：
Doneva, Daniela D. [1 ,2 ]
Yazadjiev, Stoytcho S. [1 ,3 ,4 ]
机构：
[1] Eberhard Karls Univ Tubingen, Theoret Astrophys, D-72076 Tubingen, Germany
[2] INRNE Bulgarian Acad Sci, Sofia 1784, Bulgaria
[3] Sofia Univ, Fac Phys, Dept Theoret Phys, Sofia 1164, Bulgaria
[4] Bulgarian Acad Sci, Inst Math & Informat, Acad G Bonchev St 8, BU-1113 Sofia, Bulgaria
来源：
JOURNAL OF COSMOLOGY AND ASTROPARTICLE PHYSICS | 2018年 / 04期
关键词：
modified gravity; neutron stars; GRAVITY;
D O I：
10.1088/1475-7516/2018/04/011
中图分类号：
P1 [天文学];
学科分类号：
0704 ;
摘要：
In the present paper we study models of neutron stars in a class of extended scalar-tensor Gauss-Bonnet (ESTGB) theories for which the scalar degree of freedom is exited only in the strong curvature regime. We show that in the framework of the ESTGB theories under consideration there exist new neutron star solutions which are formed via spontaneous scalarization of the general relativistic neutron stars. In contrast to the spontaneous scalarization in the standard scalar-tensor theories which is induced by the presence of matter, in our case the scalarization is induced by the spacetime curvature.
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页数：14
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