Massive neutron stars as mass gap candidates: Exploring equation of state and magnetic field

被引：1

作者：

Zuraiq, Zenia ^{[1
]}

Mukhopadhyay, Banibrata ^{[1
]}

Weber, Fridolin ^{[2
,3
]}

机构：

[1] Indian Inst Sci, Dept Phys, Bengaluru 560012, India

[2] San Diego State Univ, Dept Phys, 5500 Campanile Dr, San Diego, CA 92182 USA

[3] Univ Calif San Diego, Ctr Astrophys & Space Sci, La Jolla, CA 92093 USA

来源：

PHYSICAL REVIEW D | 2024年 / 109卷 / 02期

基金：

美国国家科学基金会;

关键词：

GRAVITATIONAL-WAVE; ADIABATIC STABILITY; MAXIMUM MASS; SUPERFLUIDITY; MATTER; GW190814; NUCLEAR; PHASE;

D O I：

10.1103/PhysRevD.109.023027

中图分类号：

P1 [天文学];

学科分类号：

0704 ;

摘要：

The densities in the cores of the neutron stars (NSs) can reach several times that of the nuclear saturation density. The exact nature of matter at these densities is still virtually unknown. We consider a number of proposed phenomenological, relativistic mean field equations of state to construct theoretical models of NSs. We find that, based on our selected set of models, the emergence of exotic matter at these high densities restricts the mass of NSs to similar or equal to 2.2M circle dot. However, the presence of magnetic fields and a model anisotropy significantly increases the star's mass, placing it within the observational mass gap that separates the heaviest NSs from the lightest black holes. Therefore, we propose that gravitational wave observations, like GW190814 and other potential candidates within this mass gap, may actually represent massive, magnetized NSs.

引用

页数：17

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