Abstract
Gravitational-waves (GWs) data have widely been used for testing preferred modified gravity theories. In this paper, we investigate the possibility of testing them in the strong gravity regime by looking at the properties of compact objects in dense matter physics. In this direction modified gravity theories such as f(R, T) gravity can be tested with the recently discovered compact binary merger, GW 190814, containing a compact object with mass 2.50–2.67 M_{odot }. By considering these constraints on maximum mass of such an object, we predict the existence of quark stars (QSs) made of quark matter in the color-flavor-locked (CFL) phase of color superconductivity. Such a state is significantly more bound than ordinary quark matter and enhances the possibility of the existence of a pure stable QS. We focus on the following aspects in particular: mass–radius profile, mass-central mass density relation, compactness and the corresponding effective adiabatic index for stability related issues. Our result implies that predicted properties for QSs are well consistent with GW 190814 observational data that helps us to impose constraints on the theoretical models of dense nuclear matter.
Highlights
Continued to bear out these observations, the most notable being the detection of gravitational waves [1] and the photographing of the shadow of a black hole [2]
It is well-known that the study of compact objects such as neutron stars, pulsars and quark stars in both classical general relativity (CGR) and modified theories of gravity have leap-frogged from mathematical excursion of the governing equations into mainstream observations of these astrophysical bodies
In this work we have analyzed quark stars (QSs) that consists of quark matter in the color-flavor-locked (CFL) phase of color superconductivity
Summary
In order to overcome these pathologies, there were various attempts to modify CGR. This gave rise to a spectrum of modified theories of gravity, including f (R), f (R, T ), Lovelock gravity, Einstein–Gauss–Bonnet (EGB) gravity, amongst others. A comparative study of neutron and strange stars oscillations in CGR and R2 gravity was carried out by Staykov et al [4]. In this work they demonstrated that In this paper, we investigated neutron and strange stars oscillations in GR and R2 gravity. By employing the Cowling approximation over a wide spectrum of EoS’s with varying stiffnesses, they showed the observed maximum deviation
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