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A generalized family of anisotropic compact object in general relativity

Maurya, S K and Ray, Saibal and Ghosh, Shounak and Manna, Sarbajit and Smitha, T T (2018) A generalized family of anisotropic compact object in general relativity. In: ANNALS OF PHYSICS, 395 . pp. 152-169.

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Official URL: http://dx.doi.org/10.1016/j.aop.2018.05.012


We present model for anisotropic compact star under the general theory of relativity of Einstein. In the study a 4-dimensional spacetime has been considered which is embedded into the 5-dimensional flat metric so that the spherically symmetric metric has class 1. A set of solutions for the field equations are found depending on the index n involved in the physical parameters. The interior solutions have been matched smoothly at the boundary of the spherical distribution to the exterior Schwarzschild solution which necessarily provides values of the unknown constants. We have chosen the values of n as n = 2 and n=10 to 20000 for which interesting and physically viable results can be found out. The investigations on the physical features of the model include several astrophysical issues, like (i) regularity behaviour of stars at the centre, (ii) well behaved condition for velocity of sound, (iii) energy conditions, (iv) stability of the system via the following three techniques - adiabatic index, Herrera cracking concept and TOV equation, (v) total mass, effective mass and compactification factor and (vi) surface redshift. Specific numerical values of the compact star candidates LMC X-4 and SMC X-1 are calculated for central and surface densities as well as central pressure to compare the model value with actual observational data. (C) 2018 Published by Elsevier Inc.

Item Type: Journal Article
Additional Information: Copy right for this article belong to ACADEMIC PRESS INC ELSEVIER SCIENCE, 525 B ST, STE 1900, SAN DIEGO, CA 92101-4495 USA
Keywords: General relativity; Spherical symmetry; Compact star; Embedding class
Department/Centre: Division of Mechanical Sciences > Materials Engineering (formerly Metallurgy)
Date Deposited: 12 Sep 2018 15:17
Last Modified: 12 Sep 2018 15:17
URI: http://eprints.iisc.ac.in/id/eprint/60660

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