The Mass-Radius relation for Quark Stars in Energy-Momentum Squared Gravity

TL;DR

This paper investigates how energy-momentum squared gravity (EMSG) affects the structure, mass-radius relations, and stability of quark stars with a specific equation of state, revealing EMSG's significant impact on their properties.

Contribution

It provides the first detailed analysis of quark stars within EMSG, including mass-radius relations and stability criteria, highlighting the influence of the gravity modification.

Findings

EMSG alters the maximum mass of quark stars.

The mass-radius relation is significantly affected by EMSG parameters.

Stability conditions depend on the EMSG parameter $eta$.

Abstract

We study the structure of quark stars (QSs) adopting homogeneously confined matter inside the star with a 3-flavor neutral charge and a fixed strange quark mass $m_s$. We explore the internal structure, and the physical properties of specific classes of QSs in the recently proposed energy-momentum squared gravity (EMSG). Also, we obtain the mass-radius $(M-R)$ and mass-central energy density $(M-\rho_c)$ relations for QS using the QCD motivated EoS. The maximum mass for QSs in EMSG is investigated depending on the presence and absence of the free parameter $\alpha$. Furthermore, the stability of stars is determined by the condition $\frac{d M}{d \rho_c}>0$. We observe that consideration of the EMSG has specific contributions to the structure of QSs.