Existence of Dark Energy Stars within Lower Mass Gap in the Realm of f(Q)$f(Q)$ Gravity

Abstract

The object of this article is to study a new class of dark energy stars in the background of gravity by using the metric potentials proposed by Krori‐Barua [J. Phys. A, Math. Gen. 8:508 (1975)]. To achieve the goal, a quadratic form of as is taken into account for the static spherically symmetric spacetime,`a' being a coupling parameter of gravity. The maximum allowable masses with corresponding radii have been obtained via plots for and 8. The obtained maximum masses from our analysis are found in the range . For a smaller value of the coupling parameter ‘a’ associated with gravity, more massive stars are found. The radii corresponding to the maximum masses also increase with decreasing ‘a’. In particular, when , the theory can achieve a dark energy star of mass for certain specific combinations of model parameters. This obtained mass is located within a mass in the range of and that can be a lighter object in the GW190814 event detected by LIGO/VIRGO experiments.

Realistic compact objects in the f(R, T) gravity in the background of polytropic and barotropic gas models

“…Figure 26 represents ω(r) has a decaying pattern and vanishes on the surface of the star. Also ω ò [0,1] satisfied within the compact objects and hence, it can be concluded this model is well-behaved [77,78].…”

“…⎞ ⎠ this metric corresponds to the interior line element in equation (25). The continuity of the boundary ∑ for equation (6) provides the explicit equation [77] [ ] ( ) ds 0. 34…”

Singularity Free Star Model Characterized by Quintessence Field in Quadratic f(Q)$f(Q)$ Gravity

“…[79] The M − R plot displayed the same behavior, according to. [80,81] Deb et al [82] used the conventional choice of f (R, T) = R + 2𝜒T to examine the impact of the modified f (R, T) gravity on the charged strange quark stars. From the investigation, the authors showed that the compact star system grows more massive and larger in size as 𝜒 values decrease.…”