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Title of Journal: Astrophys Space Sci

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Abbravation: Astrophysics and Space Science

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Springer Netherlands

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DOI

10.1016/0015-6264(81)90582-4

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1572-946X

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EinsteinMaxwell field equations in isotropic coor

Authors: N Pradhan Neeraj Pant
Publish Date: 2014/04/01
Volume: 352, Issue: 1, Pages: 143-149
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Abstract

We present a new class of static spherically symmetric exact solutions of the EinsteinMaxwell field equations in isotropic coordinates for perfect fluid by considering a specific choice of electrical intensity which involves a parameter K The resulting solutions represent charged fluid spheres joining smoothly with the ReissnerNordstrom metric at the pressure free interface The solutions so obtained are utilized to construct the models for superdense star like neutron stars ρ b =2 and 27×1014 g/cm3 and Quark stars ρ b =46888×1014 g/cm3 It is observed that the models are well behaved for the restricted value of parameter K 0141≤K≤0159999 Corresponding to K max =0159999 for which u max =0259 the resulting Quark star has a maximum mass M=1618 M ⊙ and radius R=9263 km and the neutron star modeling based on the particular solution corresponding to K=015 u=0238 and by assuming the surface density ρ b =27×1014 g/cm3 the maximum mass of neutron star M=1966 M ⊙ and radius R=1223 km and by assuming the surface density ρ b =2×1014 g/cm3 the resulting well behaved solution has a maximum mass of neutron M=2284 M ⊙ and radius R=1421 km The robustness of our result is that it matches with the recent discoveriesAuthors express their sincere gratitude to the reviewers for rigorous review constructive comments and useful suggestions Authors are grateful to Prof AN Srivastava HOD Mathematics and Prof S Nandi HOD Physics for their encouragement and motivation

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