论文标题
在F（r）重力理论中具有逼真的EOS的中子星星
Neutron Stars with realistic EoS in f(R) theories of gravity
论文作者
论文摘要
在本文中，我们检查了具有现实状态方程的扰动$ f（r）$重力模型中的中子星形结构。我们在两个形式的重力模型中获得质量 - 拉迪乌斯关系，$ f_ {1}（r）= r+αr（e^{ - r/r_0} -1）$和$ f_ {2}（r）= r+αr^2 $。为此，我们考虑了在相对论平均模型框架中产生的几个核子和奇怪的EOSS的NS。 NS核心中的奇怪颗粒除核子和瘦素外，还采用$λ$ Hyperons和Quarks的形式。在GR的情况下，所选EOSS的M-R关系很好地在于观察限制。我们表明，这些EOSS对扰动参数$α$提供了最严格的约束，因此可以被认为是在天体物理水平上修饰的重力的重要实验探针。
In this paper, we examine neutron star structure in perturbative $f(R)$ gravity models with realistic equation of state. We obtain mass-radius relations in two gravity models of the form $f_{1}(R)=R+ αR(e^{-R/R_0}-1)$ and $f_{2}(R)=R+αR^2$. For this purpose, we consider NS with several nucleonic as well as strange EoSs generated in the framework of relativistic mean field models. The strange particles in the core of NS are in the form of $Λ$ hyperons and quarks, in addition to the nucleons and leptons. The M-R relation of the chosen EoSs lies well within the observational limit in the case of GR. We show that these EoSs provide the most stringent constraint on the perturbative parameter $α$ and therefore can be considered as important experimental probe for modified gravity at astrophysical level.
