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Li, BL; Cui, ZF; Yu, ZH; Yan, Y4; An, S; Zong, HS
Structures of the strange quark stars within a quasiparticle model
Source PublicationPHYSICAL REVIEW D
Language英语
KeywordEQUATION-OF-STATE GLUON PLASMA MATTER
AbstractThe structures of strange quark stars are studied within a quasiparticle model obtained by the two-loop approximation. A softer equation of state yields a smaller maximum mass, a smaller radius, and makes the surface energy density and the surface quark chemical potential larger. The parameter space is obtained under the following constraints: the maximum mass of the strange quark star should be larger than 2.0 solar masses, which matches the masses of PSR J0348 + 0432 and PSR J1614-2230, and the surface energy density should be larger than 2.80 x 10(14) g/cm(3). In our parameter space, the surface quark chemical potential is smaller than 308 MeV which is the critical quark chemical potential in QCD without electromagnetism. Also, the tidal Love number k(2) and deformability. are calculated for a 1.4-solar-mass strange quark star. A softer equation of state yields a smaller Lambda(1.4) and leads to a strange quark star that is more compact and less likely to be tidally deformed. The data of GW170817 indicate that the upper bound of Lambda(1.4) is 800 for the low-spin prior, which gives an upper bound of the parameter zeta of the running coupling constant alpha(s) and gives a lower bound of the vacuum pressure density B, i.e., zeta < 0.098 GeV, B > (0.111 GeV)(4). Moreover, the constraint on zeta also plays an important role in phenomenological studies of the quark-gluon plasma.
2019
ISSN2470-0010
Volume99Issue:4Pages:43001
Subject AreaAstronomy & Astrophysics ; Physics
MOST Discipline CatalogueAstronomy & Astrophysics ; Physics, Particles & Fields
DOI10.1103/PhysRevD.99.043001
Indexed BySCIE
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Cited Times:1[WOS]   [WOS Record]     [Related Records in WOS]
Document Type期刊论文
Identifierhttp://ir.itp.ac.cn/handle/311006/23492
CollectionSCI期刊论文
Affiliation1.Nanjing Univ, Coll Engn & Appl Sci, Nanjing 210093, Jiangsu, Peoples R China
2.Nanjing Proton Source Res & Design Ctr, Nanjing 210093, Jiangsu, Peoples R China
3.Nanjing Univ, Dept Phys, Nanjing 210093, Jiangsu, Peoples R China
4.Chinese Acad Sci, Inst Theoret Phys, State Key Lab Theoret Phys, Beijing 100190, Peoples R China
5.Changzhou Univ, Sch Math & Phys, Changzhou 213164, Jiangsu, Peoples R China
6.Joint Ctr Particle Nucl Phys & Cosmol, Nanjing 210093, Jiangsu, Peoples R China
Recommended Citation
GB/T 7714
Li, BL,Cui, ZF,Yu, ZH,et al. Structures of the strange quark stars within a quasiparticle model[J]. PHYSICAL REVIEW D,2019,99(4):43001.
APA Li, BL,Cui, ZF,Yu, ZH,Yan, Y,An, S,&Zong, HS.(2019).Structures of the strange quark stars within a quasiparticle model.PHYSICAL REVIEW D,99(4),43001.
MLA Li, BL,et al."Structures of the strange quark stars within a quasiparticle model".PHYSICAL REVIEW D 99.4(2019):43001.
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