Anisotropic strange star with Tolman-Kuchowicz metric under f(R, T) gravity

被引：98

作者：

Biswas, Suparna ^{[1
]}

Shee, Dibyendu ^{[2
]}

Guha, B. K. ^{[1
]}

Ray, Saibal ^{[3
,4
]}

机构：

[1] Indian Inst Engn Sci & Technol, Dept Phys, Howrah 711103, W Bengal, India

[2] Bengal Engn Coll, Model Sch, IIEST Campus, Howrah 711103, W Bengal, India

[3] Govt Coll Engn & Ceram Technol, Dept Phys, Kolkata 700010, W Bengal, India

[4] Maulana Abul Kalam Azad Univ Technol, Dept Nat Sci, Haringhata 741249, W Bengal, India

来源：

EUROPEAN PHYSICAL JOURNAL C | 2020年 / 80卷 / 02期

关键词：

NEUTRON-STAR; FIELD-EQUATIONS; DYNAMICAL INSTABILITY; RELATIVISTIC MODEL; ENERGY DENSITY; QUARK STARS; SPHERES; MATTER; STABILITY; QUANTUM;

D O I：

10.1140/epjc/s10052-020-7725-0

中图分类号：

O412 [相对论、场论]; O572.2 [粒子物理学];

学科分类号：

摘要：

In the current article, we study anisotropic spherically symmetric strange star under the background of f ( R, T) gravity using the metric potentials of Tolman-Kuchowicz type (Tolman in PhysRev 55:364, 1939; Kuchowicz in Acta Phys Pol 33:541, 1968) as.(r) = ln(1 + ar2 + br4) and.(r) = Br2 + 2 ln C which are free from singularity, satisfy stability criteria and also well-behaved. We calculate the value of constants a, b, B and C using matching conditions and the observed values of the masses and radii of known samples. To describe the strange quark matter (SQM) distribution, here we have used the phenomenological MIT bag model equation of state (EOS) where the density profile (rho) is related to the radial pressure (pr) as pr (r) = 13 (rho - 4B(g)). Here quark pressure is responsible for generation of bag constant Bg. Motivation behind this study lies in finding out a non-singular physically acceptable solution having various properties of strange stars. The model shows consistency with various energy conditions, TOV equation, Herrera's cracking condition and also with Harrison-Zeldovich-Novikov's static stability criteria. Numerical values of EOS parameter and the adiabatic index also enhance the acceptability of our model.

引用

页数：15

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