论文标题
使用现实状态方程
Non-radial oscillations and global stellar properties of anisotropic compact stars using realistic equations of state
论文作者
论文摘要
在这项工作中,我们对紧凑型恒星的基本模式的重力波频率如何受到现实状态方程的影响。我们的研究是Doneva [Phys。 Rev. D 85(2012)124023],其中使用了状态的多面式方程。为了实现我们的目标,我们考虑了紧凑型恒星,这些恒星是通过使用状态方程在相对论平均野外理论的框架中为Hadronic Stars的情况而建造的,以及在Quark Stars案例的MIT模型的框架中。为了获得一些相关信息,可以使我们有可能检测紧凑型恒星中各向异性,我们还研究并分析了各种全球恒星量的行为,例如重力红移,恒星质量,半径等。我们得出的结论是,各向异性效应可能会产生重要的后果,这与各向异性参数和高密度物质状态方程密切相关。此外,已经进行了观察数据的比较,我们已经表明,各向异性参数$λ$可用作调谐参数,以重现中子星的质量和半径观察数据。
In this work, we have made a systematic study of how the gravitational wave frequency of the fundamental mode from compact stars is affected by anisotropic effects using realistic equations of state. Our study is an extension of the seminal research performed by Doneva [Phys. Rev. D 85 (2012) 124023], where a polytropic equation of state was used. To achieve our objective, we considered compact stars which were built by using equations of state in the framework of a relativistic mean field theory for the case of hadronic stars and in the framework of the MIT model for the case of quark stars. In order to obtain some pertinent information that could give us the possibility to detect the anisotropy in compact stars, we also studied and analized the behaviour of various global stellar quantities, e.g., gravitational redshift, stellar mass, radius, among others. We concluded that the anisotropic effects can have important consequences, which are strongly related to the anisotropic parameter and the equation of state of high density matter. Additionally, a comparison with observational data has been made and we have shown that the anisotropic parameter $λ$ can be used as a tuning parameter to reproduce mass and radius observational data of neutron stars.