Tolman IV fluid sphere in f(R, T) gravity

Abstract

In this article, we studied the behavior of relativistic spherical objects considering Tolman IV spacetime in modified $f(R,T)$ gravity for the uncharged perfect fluid matter. We have chosen the matter Lagrangian as ${\mathcal{L}}_m=-p$ to develop our present model. In particular, for this investigation we have reported for the compact object LMC $X-4$ [Mass=$(1.04\pm 0.09)M_{\odot }$; Radius= $8.301_{-0.2}^{+0.2}$ Km] in our paper. The effect of the coupling parameter $\beta$ on the local matter distribution of compact stars has been investigated in this paper. It can be seen that with greater values of $\beta$, the sound speed and adiabatic index are higher. On contrary, the mass function takes lower value for higher values of $\beta$. Our obtained solution does not admit singularities in the matter density, pressure and metric functions. According to our graphical analysis, this new stellar model satisfies all physical requirements anticipated in a realistic star.

13 pages, 8 figures; Accepted in Chinese Journal of Physics on 19 November 2021; Available online 5 December 2021

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