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Anisotropic quark stars in R2 gravity
Physics Letters B ( IF 4.3 ) Pub Date : 2021-05-04 , DOI: 10.1016/j.physletb.2021.136330
Grigoris Panotopoulos , Takol Tangphati , Ayan Banerjee , M.K. Jasim

In the present paper, we treat the problem of the existence of quark stars (QSs) for selected homogeneous and unpaired charge-neutral 3-flavor interacting quark matter with O(ms4) corrections equations of state (EoS). Using the EoS combined with the Tolmann-Oppenheimer-Volkoff (TOV) structure equations, the properties of stars are explored by obtaining their mass-radius relations. All calculations are carried out within the framework of the R-squared gravity defined by f(R)=R+aR2. Our main goal is to discuss the effect for a wide range of the R-squared gravity parameter, a, on the mass-radius and the mass-central mass density (Mϵc) relation of QSs. Furthermore, we investigate the dynamical stability condition for those stars, and we show that their dynamical stability depends on the anisotropic parameters B and a4 coming from the respective EoS. In such a scenario our results provide circumstantial evidence in favor of super-massive pulsars.



中文翻译:

R 2重力下的各向异性夸克星

在本文中,我们处理了选择的均质且不成对的电荷中性3味相互作用夸克物质的夸克星(QSs)存在的问题。 Øs4校正状态方程(EoS)。通过结合EoS和Tolmann-Oppenheimer-Volkoff(TOV)结构方程,通过获得恒星的质量半径关系来探索恒星的特性。所有计算均在由以下公式定义的R平方引力的框架内进行F[R=[R+一种[R2个。我们的主要目标是讨论大范围的R平方重力参数a对质量半径和质量中心质量密度的影响中号-ϵCQSs的关系。此外,我们研究了这些恒星的动力稳定性条件,并表明它们的动力稳定性取决于各向异性参数一种4来自各自的EoS。在这种情况下,我们的结果提供了支持超级大质量脉冲星的间接证据。

更新日期:2021-05-07
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