Quark matter and quark stars in a quasiparticle model

Zhen Zhang, Peng-Cheng Chu, Xiao-Hua Li, He Liu, and Xiao-Min Zhang

Phys. Rev. D 103, 103021 – Published 27 May 2021

Abstract

We investigate the properties of the equation of state of strange-quark matter and $u − d$ quark matter, the sound velocity of quark matter, the stability region for star matter, the maximum mass of quark stars (QSs), and the tidal deformability for QSs by using a quark quasiparticle model. Our results indicate that the recently discovered heavy compact stars PSR $J 0348 + 0432$ , MSR $J 0740 + 6620$ , and PSR $J 2215 + 5135$ , and especially the GW190814s secondary component $m_{2}$ can be well described as QSs within the quasiparticle model.

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Received 11 January 2021
Accepted 5 May 2021

DOI:https://doi.org/10.1103/PhysRevD.103.103021

Physics Subject Headings (PhySH)

Gravitational waves Nuclear matter in neutron stars

Particles & FieldsGravitation, Cosmology & AstrophysicsNuclear Physics

Authors & Affiliations

Zhen Zhang¹, Peng-Cheng Chu ^2,*, Xiao-Hua Li^3,4,†, He Liu^2,‡, and Xiao-Min Zhang^2,§

¹Sino-French Institute of Nuclear Engineering and Technology, Sun Yat-sen University, Zhuhai 519082, China
²The Research Center for Theoretical Physics, Science School, Qingdao University of Technology, Qingdao, 266033, China
³School of Nuclear Science and Technology, University of South China, 421001 Hengyang, China
⁴Cooperative Innovation Center for Nuclear Fuel Cycle Technology & Equipment, University of South China, 421001 Hengyang, China

^*kyois@126.com
^†lixiaohuaphysics@126.com
^‡liuhe@qut.edu.cn
^§zhangxm@mail.bnu.edu.cn

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Vol. 103, Iss. 10 — 15 May 2021

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Physical Review D

covering particles, fields, gravitation, and cosmology