Non-Newtonian Gravity in Strange Quark Stars and Constraints from the Observations of PSR J0740+6620 and GW170817
Non-Newtonian Gravity in Strange Quark Stars and Constraints from the Observations of PSR J0740+6620 and GW170817
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DOI：
10.3847/1538-4357/abb365
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发表时间：
2019-09
期刊：
影响因子：
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通讯作者：
Shuhua Yang;C. Pi;Xiao-ping Zheng;F. Weber
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文献类型：
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作者：
Shuhua Yang;C. Pi;Xiao-ping Zheng;F. Weber
利用PSR J0740+6620的质量和GW170817的潮汐变形性，研究了非牛顿引力对奇异夸克星(QSS)性质的影响，并约束了用于描述奇异夸克物质(SQM)的标准MIT袋模型的参数。我们发现，对于标准的MIT袋模型，如果忽略非牛顿引力效应，这些质量和潮汐变形性观测将排除QSS的存在。对于ms=95 MeV的奇异夸克质量，我们发现非牛顿引力参数G2/μ2的取值范围为1.37GeV−2≤G2/μ2≤7.28GeV−2，并对141.3 MeV≤B1/4≤150.9 MeV和αS≤0.56GeV≤B1/4≤150.9 MeV和αS≤所给出的袋常数和强相互作用耦合常数进行了限制。对于质量为ms=150 MeV的奇异夸克，1.88GeV−2≤G2/μ2≤6.27GeV−2存在QSS，并对139.7 MeV≤B1/4≤147.3 MeV和αS≤给出的模型参数进行了限制。
We investigate the effects of non-Newtonian gravity on the properties of strange quark stars (QSs) and constrain the parameters of the standard MIT bag model used to describe strange quark matter (SQM) by employing the mass of PSR J0740+6620 and the tidal deformability of GW170817. We find that, for the standard MIT bag model, these mass and tidal deformability observations would rule out the existence of QSs if non-Newtonian gravity effects are ignored. For a strange quark mass of ms = 95 MeV, we find that QSs can exist for values of the non-Newtonian gravity parameter g2/μ2 in the range of 1.37 GeV−2 ≤ g2/μ2 ≤ 7.28 GeV−2 and limits on the bag constant and the strong interaction coupling constant of the SQM model given by 141.3 MeV ≤ B1/4 ≤ 150.9 MeV and αS ≤ 0.56. For a strange quark mass of ms = 150 MeV, QSs can exist for 1.88 GeV−2 ≤ g2/μ2 ≤ 6.27 GeV−2 and limits on the parameters of the SQM model given by 139.7 MeV ≤ B1/4 ≤ 147.3 MeV and αS ≤ 0.49.