https://doi.org/10.1140/epjp/s13360-020-00755-4
Regular Article
Charged strange star with Krori–Barua potential in f(R, T) gravity admitting Chaplygin equation of state
Department of Mathematics, Government General Degree College, West Bengal, 712 409, Singur, Hooghly, India
Received:
15
August
2020
Accepted:
4
September
2020
Published online:
23
September
2020
In present paper, a new compact star model in f(R, T) gravity is obtained, where R and T denote the Ricci scalar and the trace of energy–momentum tensor 
, respectively. To develop the model, we consider the spherically symmetric spacetime along with anisotropic fluid distribution in the presence of electric field with 
, where 
is a small positive constant. We have used the Chaplygin equation of state to explore the stellar model. The field equations for f(R, T) gravity have been solved by employing the Krori–Barua ansatz already reported in the literature [J. Phys. A, Math. Gen. 8:508, 1975]. The exterior spacetime is described by Reissner–Nordström line element for smooth matching at the boundary. It is worthwhile to mention here that the values of all the constants involved with this model have been calculated for the strange stars 4U 1538-52 for different values of with the help of matching conditions. The acceptability of the model is discussed in detail both analytically and graphically by studying the physical attributes of matter density, pressures, anisotropy factor, stability, etc. We have also obtained the numerical values in tabular form for central density, surface density, central pressure and central adiabatic index for different values of . The solutions of the field equations in Einstein gravity can be regained by simply putting 
to our solution. Moreover, the proposed model is shown to be physically admissible and corroborate with experimental observations on strange star candidates such as 4U 1538-52.
© Società Italiana di Fisica and Springer-Verlag GmbH Germany, part of Springer Nature 2020
