Twin stars in General Relativity and Extended Theories of Gravity

被引：2

作者：

Lope-Oter, Eva ^{[1
,2
,3
]}

Wojnar, Aneta ^{[1
,2
,3
]}

机构：

[1] Univ Complutense Madrid, Dept Fis Teor, E-28040 Madrid, Spain

[2] Univ Complutense Madrid, IPARCOS, E-28040 Madrid, Spain

[3] Univ Wroclaw, Inst Theoret Phys, Dept Phys & Astron, Pl Maxa Borna 9, PL-50206 Wroclaw, Poland

来源：

JOURNAL OF COSMOLOGY AND ASTROPARTICLE PHYSICS | 2025年 / 01期

关键词：

modified gravity; neutron stars; NEUTRON-STARS;

D O I：

10.1088/1475-7516/2025/01/054

中图分类号：

P1 [天文学];

学科分类号：

0704 ;

摘要：

We explore gravity-independent equations of state for neutron stars, particularly focusing on twin stars. Twin neutron stars refer to a theoretical phenomenon in which two neutron stars with the same mass exist in different stable configurations. Examining four categories, we emphasize their behavior in both General Relativity and Palatini gravity. Additionally, we discuss a subcategory of type I, which, in the context of General Relativity, does not exhibit twin star phenomena, yet demonstrates this phenomenon in modified gravity. Furthermore, we briefly address challenges associated with the negative trace of the energy-momentum tensor, prevalent in both theories.

引用

页数：36

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