Bulk viscosity of interacting magnetized strange quark matter

被引：3

作者：

Xu, Jian-Feng ^{[1
]}

机构：

[1] Anyang Normal Univ, Sch Phys & Elect Engn, Anyang 455000, Peoples R China

来源：

NUCLEAR SCIENCE AND TECHNIQUES | 2021年 / 32卷 / 10期

基金：

中国国家自然科学基金;

关键词：

Strange quark matter; Bulk viscosity; Strong magnetic field; Strange star; R-mode instability window; R-MODE INSTABILITY; NEUTRON-STARS; X-RAY;

D O I：

10.1007/s41365-021-00954-3

中图分类号：

TL [原子能技术]; O571 [原子核物理学];

学科分类号：

0827 ; 082701 ;

摘要：

The bulk viscosity of interacting strange quark matter in a strong external magnetic field B-m with a real equation of state is investigated. It is found that interquark interactions can significantly increase the bulk viscosity, and the magnetic field B-m can cause irregular oscillations in both components of the bulk viscosity, zeta(parallel to) (parallel to B-m) and zeta(perpendicular to) (perpendicular to B-m). A comparison with non-interacting strange quark matter reveals that when B-m is sufficiently large, zeta(perpendicular to) is more affected by interactions than zeta(parallel to). Additionally, the quasi-oscillation of the bulk viscosity with changes in density may facilitate the formation of magnetic domains. Moreover, the resulting rmode instability windows are in good agreement with observational data for compact stars in low-mass X-ray binaries. Specifically, the r-mode instability window for interacting strange quark matter in high magnetic fields has a minimum rotation frequency exceeding 1050 Hz, which may explain the observed very high spin frequency of a pulsar with nu = 1122 Hz.

引用

页数：9

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