Constraining mirror dark matter inside neutron stars

被引：26

作者：

Ciancarella, Raul ^{[1
,2
,3
,4
]}

Pannarale, Francesco ^{[1
,2
]}

Addazi, Andrea ^{[5
,6
]}

Marciano, Antonino ^{[7
,8
,9
]}

机构：

[1] Univ Roma Sapienza, Dipartimento Fis, Piazzale A Moro 5, I-00185 Rome, Italy

[2] Ist Nazl Fis Nucl, Sez Roma, Piazzale A Moro 5, I-00185 Rome, Italy

[3] Univ Roma Tre, Dipartimento Matemat & Fis, Largo S Leonardo Murialdo 1, I-00146 Rome, Italy

[4] Ist Nazl Fis Nucl, Sez Roma Tre, Largo S Leonardo Murialdo 1, I-00146 Rome, Italy

[5] Sichuan Univ, Coll Phys Sci & Technol, Ctr Theoret Phys, Chengdu 610065, Peoples R China

[6] Ist Nazl Fis Nucl, Sez Roma Tor Vergata, I-00133 Rome, Italy

[7] Fudan Univ, Dept Phys, Shanghai 200433, Peoples R China

[8] Fudan Univ, Ctr Field Theory & Particle Phys, Shanghai 200433, Peoples R China

[9] Ist Nazl Fis Nucl, Lab Nazl Frascati, Rome, EU, Italy

来源：

PHYSICS OF THE DARK UNIVERSE | 2021年 / 32卷

基金：

美国国家科学基金会;

关键词：

Neutron stars; Mirror dark matter; Gravitational Waves; MASS-RADIUS RELATION; EQUATION-OF-STATE; DENSE MATTER;

D O I：

10.1016/j.dark.2021.100796

中图分类号：

P1 [天文学];

学科分类号：

0704 ;

摘要：

We inspect the possibility that neutron star interiors are a mixture of ordinary matter and mirror dark matter. This is a scenario that can be naturally envisaged according to well studied accretion mechanisms, including the Bondi-Hoyle one. We show that the inclusion of mirror dark matter in neutron star models lowers the maximum neutron star mass for a given equation of state, and that it decreases the tidal deformability of a given neutron star. These general features imply that, given an equation of state, one can constrain the maximum viable amount of mirror dark matter in neutron stars in order to consistently fulfil existing maximum mass and tidal deformability constraints. Conversely, using tidal deformability measurements to rule out equations of state requires making assumptions on the amount of mirror dark matter contained in neutron stars. Finally, the presence of mirror dark matter also modifies the universal relation that links the tidal deformability of a neutron star to its compactness. Therefore, caution is mandatory when considering exotic models, such as the ones discussed in this paper. (C) 2021 Published by Elsevier B.V.

引用

页数：9

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