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arXiv · 2207.12947

Charged quark stars in $f(R,T)$ gravity

Juan M. Z. Pretel·Takol Tangphati·Ayan Banerjee·Anirudh Pradhan
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Abstract

Recent advances in nuclear theory combined with new astrophysical observations have led to the need for specific theoretical models that actually apply to phenomena on dense-matter physics. At the same time, quantum chromodynamics (QCD) predicts the existence of non-nucleonic degrees of freedom at high densities in neutron-star matter, such as quark matter. Within a confining quark matter model, which consists of homogeneous, neutral 3-flavor interacting quark matter with $\mathcal{O}(m_s^4)$ corrections, we study the structure of compact stars made of a charged perfect fluid in the context of $f(R,T)$ gravity. The system of differential equations that describe the structure of charged compact stars have been derived and solved numerically for a gravity model with $f(R,T)= R+ 2\beta T$. For simplicity, we assume that the charge density is proportional to the energy density, namely, $\rho_{\rm ch} = \alpha \rho$. It is demonstrated that matter-geometry coupling constant $\beta$ and the charge parameter $\alpha$ affect the total gravitational mass and the radius of the star.

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Juan M. Z. Pretel, Takol Tangphati, Ayan Banerjee, Anirudh Pradhan. 2022-07-26. Charged quark stars in $f(R,T)$ gravity. https://doi.org/10.1088/1674-1137/ac84cb

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