Cluster of stars in f(, T) gravity

Abstract

This paper is devoted to analyze the dynamical impacts of f(G, T ) gravity model on the cluster of stars. For this motive, we consider the spherically symmetric interior geometry with anisotropic fluid as analogous to cluster of stars distributions. We express the modified field equations by taking a particular model of f(G, T ), i.e. f(G, T ) = f(T ) + f(G). In order to explore the evolutionary behavior of cluster of stars, the observational data of a compact star 4U1820−30 is used. We construct the modified scalar functions by orthogonal splitting of Riemann tensor in f(G, T ) theory of gravity and find the factors causing density irregularities in the framework. We calculate the evolution parameters by using these scalar functions. Moreover, we also investigate the structure scalars for dust ball. The dynamical effects on cluster of stars are examined via structure scalars in the presence of Gauss-Bonnet gravity. It is found that Gauss-Bonnet parameter representing exotic material in the cluster plays a vital role in governing the dynamics of cluster of stars.

Anisotropic stellar evolution and exotic matter

“…Bhatti et al [46] worked on the modification of stellar bodies in ( ) f , T  gravity and deduced that the star compactness increases for various models of gravity. In recent research, we have explored the evolutionary mechanism of collapsing stellar objects in the presence of exotic matter, uncovering its remarkable influence on the kinematics of the system [47,48]. Consequently, it seems highly intriguing to consider the ( ) f , T  theory of gravity and explore the physical insights of stellar objects.…”

Collapsing cylindrically symmetric filamentary stellar object

“…The f(R) gravity (Capozziello, 2002) is one of the simplest extensions of GR constructed by placing the generic function f(R) instead of R in the Einstein-Hilbert action. Numerous cosmological phenomena, including the inflationary phase (Barrow and Hervik, 2006), late-time cosmic evolution (Brookfield et al, 2006), validity with solar-system testing (Zhang, 2007), and astrophysical problems (R Manzoor, 2021), have been examined for various f(R) models. In the same context, Sharif and Saleem (2020a) discussed the stability of the universe against anisotropic homogeneous perturbation for different models of the f(R) theory.…”