Symmetry energy of strange quark matter and tidal deformability of strange quark stars

Jian-Feng Xu; Cheng-Jun Xia; Zhen-Yan Lu; Guang-Xiong Peng; Ya-Peng Zhao

doi:10.1007/s41365-022-01130-x

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Symmetry energy of strange quark matter and tidal deformability of strange quark stars

NUCLEAR PHYSICS AND INTERDISCIPLINARY RESEARCH | Updated：2022-12-16

- Symmetry energy of strange quark matter and tidal deformability of strange quark stars
- Nuclear Science and Techniques Vol. 33, Issue 11, Article number: 143(2022)
- Affiliations：
  
  1.College of Information Engineering, Suqian University, Suqian 223800, China
  2.School of Physics and Electrical Engineering, AnYang Normal University, Anyang 455000, China
  3.Center for Gravitation and Cosmology, College of Physical Science and Technology, Yangzhou University, Yangzhou 225009, China
  4.Hunan Provincial Key Laboratory of Intelligent Sensors and Advanced Sensor Materials, School of Physics and Electronics, Hunan University of Science and Technology, Xiangtan 411201, China
  5.School of Nuclear Science and Technology, University of Chinese Academy of Sciences, Beijing 100049, China
  6.Institute of High-Energy Physics, Chinese Academy of Sciences, Beijing 100049, China
  7.School of Mathematics and Physics, Henan Urban Construction University, Pingdingshan 467036, China
- Author bio：
  
  † xujf@squ.edu.cn
  ‡ cjxia@yzu.edu.cn
  § luzhenyan@hnust.edu.cn
  ¶ gxpeng@ucas.ac.cn
- Funds：
- DOI：10.1007/s41365-022-01130-x
  CLC：
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Jian-Feng Xu, Cheng-Jun Xia, Zhen-Yan Lu, et al. Symmetry energy of strange quark matter and tidal deformability of strange quark stars. [J]. Nuclear Science and Techniques 33(11):143(2022)
DOI：

Jian-Feng Xu, Cheng-Jun Xia, Zhen-Yan Lu, et al. Symmetry energy of strange quark matter and tidal deformability of strange quark stars. [J]. Nuclear Science and Techniques 33(11):143(2022) DOI： 10.1007/s41365-022-01130-x.

摘要

Abstract

Research performed during the past decade revealed an important role of symmetry energy in the equation of state (EOS) of strange quark matter (SQM). By introducing an isospin-dependent term into the quark mass scaling, the SQM stability window in the equivparticle model was studied. The results show that a sufficiently strong isospin dependence ,C,I, can significantly widen the SQM region of absolute stability, yielding results that simultaneously satisfy the constraints of the astrophysical observations of PSR J1614-2230 with 1.928 ± 0.017 ,M,⊙, and tidal deformability 70 ≤ Λ,1.4, ≤ 580 measured in the event GW170817. With increasing ,C,I, the difference between the ,u,d, and ,s, quark fractions for the SQM in ,β,-equilibrium becomes inconspicuous for ,C,>,0, leading to small isospin asymmetry ,δ, and further resulting in similar EOS and structures of strange quark stars (SQSs). Moreover, unlike the behavior of the maximum mass of ,u,–,d, QSs, which varies with ,C,I, depending on the sign of the parameter ,C, the maximum mass of the SQSs decreases monotonously with increasing ,C,I,.

关键词

Keywords

Symmetry energyStrange quark matterStrange starsTidal deformability

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