Neutron Star Evolution in f(Q) Modified Gravity Framework

Abstract

The current study reports the evolution of a Neutron Star in $f(Q)$ modified gravity framework, where $f(Q)$ is chosen in the form $f(Q)=Q+\mathit{\text{aQ}},$ where the non-metricity scalar Q is taken as $Q=6H^2$ and a is constant. H is known as the Hubble parameter. Considering the modified Friedmann equation, we reformulated the density and pressure for the $f(Q)$ gravity background. In this modified gravity framework, we derived pressure and density as a function of radius r of the neutron star. The reconstructed density happens to be a monotone increasing function of radius r. This can be interpreted as the accretion of Dark Energy around the Neutron star. To further consolidate the results, we reconstruct the pressure as well, and the behavior of the pressure supports the Dark Energy accretion. The behaviors of the EOS and the model parameters have also been studied in this $f(Q)$ setting of Neutron Star.

Keywords:

• f(Q) gravity
• Friedmann equation
• Neutron Star

Disclosure statement

No potential conflict of interest was reported by the author(s).