https://doi.org/10.1140/epjc/s10052-014-2971-7
Regular Article - Theoretical Physics
Analytical model of strange star in the low-mass X-ray binary 4U 1820-30
1
Department of Physics, Aliah University, Sector-V, Salt Lake, Kolkata , 700091, India
2
Department of Mathematics, Jadavpur University, Kolkata , 700 032, West Bengal, India
3
Department of Physics, Shibpur Dinobundhoo Institution (College), Howrah , 711102, West Bengal, India
4
Department of Mathematics, Aliah University, Sector-V, Salt Lake, Kolkata , 700091, India
* e-mail: hossein@iucaa.ernet.in
Received:
13
February
2014
Accepted:
6
July
2014
Published online:
29
July
2014
In this article, we propose a model for a realistic strange star under Tolman VII metric (Tolman, Phys Rev 55:364, 1939). Here the field equations are reduced to a system of three algebraic equations for anisotropic pressure. Mass, central density and surface density of strange star in the low-mass X-ray binary 4U 1820-30 are matched with the observational data according to our model. Strange materials clearly satisfy the stability condition (i.e. sound velocities 
1) and TOV equation. Here also the surface redshift of the star is found to be within a reasonable limit.
© SIF and Springer-Verlag Berlin Heidelberg, 2014
