Measure of Complexity in Self-Gravitating Systems using Structure Scalars

Abstract

The aim of this paper is to present the definition of complexity for static selfgravitating anisotropic matter proposed in f (G, T ) theory, where G is the Gauss-Bonnet term and T is the trace of energy momentum tensor. We evaluate field equations, Tolman-Oppenheimer-Volkoff equation, mass functions and structure scalars. Among the calculated modified scalar variables that are obtained from the orthogonal splitting of Riemann tensor, a single scalar function has been identified as the complexity factor. After exploring the corresponding Tolmann mass function, it is seen that the complexity factor along with the f (G, T ) terms have greatly influenced its formulation and its role in the subsequent radial phases of the spherical system. We have also used couple of ansatz in order to discuss possible solutions of equations of motion in the study of the structure of compact object.