Eur. Phys. J. Plus (2020) 135: 3
https://doi.org/10.1140/epjp/s13360-019-00077-0

Regular Article

New models of charged anisotropic polytropes with radiation density

Department of Mathematics, University of Management and Technology, C-II, Johar Town, Lahore, Pakistan

^* e-mail: ifra.noureen@gmail.com

Received: 13 September 2019
Accepted: 18 October 2019
Published online: 7 January 2020

Abstract

In this manuscript, new classes of polytropic models have been developed by using polytropic equation of state (PEoS) for spherically symmetric gravitating sources in isotropic coordinates. The inner fluid configuration is charged anisotropic and models are developed for different values of polytropic index . Mass and radii of eight stars 4U 1820-30, Cen X-3, EXO 1785-248, SMC X-4, LMC X-4, SAX J1808.4-3658, 4U 1538-52 and Her X-1 have been regained with the help of developed models. The stability of models is discussed by using speed of sound technique and graphical analysis of model parameters. It is concluded that all models are well behaved and physically acceptable.