2020/10/29 by K. Nobleson, K Nobleson, Nobleson, K +4
Earth and Planetary Sciences · Physics and Astronomy · #Cosmology and Gravitation Theories #Geophysics and Gravity Measurements #Pulsars and Gravitational Waves Research #astro-ph.HE
paper · pdf · doi:10.48550/arxiv.2010.15406
9 figures
arxiv created 2021/06/20 · arxiv updated 2021/06/22
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 f1(R)=R+ αR(e-R/R0-1) and f2(R)=R+αR2. 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.