Charged strange star coupled to anisotropic dark energy in Tolman-Kuchowicz spacetime

被引:11
作者
Rej, Pramit [1 ]
Karmakar, Akashdip [2 ]
机构
[1] Sarat Centenary Coll, Dept Math, Hooghly 712302, W Bengal, India
[2] Indian Inst Engn Sci & Technol, Dept Math, Howrah 711103, W Bengal, India
来源
EUROPEAN PHYSICAL JOURNAL C | 2023年 / 83卷 / 08期
关键词
COMPACT STARS; CRACKING; SPHERES; MODELS; GRAVASTARS; CONSTANT; LAMBDA; FIELD;
D O I
10.1140/epjc/s10052-023-11880-6
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
The concept of dark energy can be used as a possible option to prevent the gravitational collapse of compact objects into singularities. It affects the universe on the largest scale, as it is responsible for our universe's accelerated expansion. As a consequence, it seems possible that dark energy will interact with any compact astrophysical stellar object [Phys. Rev. D 103, 084042 (2021)]. In this work, our prime focus is to develop a simplified model of a charged strange star coupled to anisotropic dark energy in Tolman-Kuchowicz spacetime (Tolman in Phys Rev 55:364, 1939; Kuchowicz in Acta Phys Pol 33:541, 1968) within the context of general relativity. To develop our model, here we consider a particular strange star object, Her X-1 with observed values of mass =(0.85 +/- 0.15)M circle dot and radius =8.1-0.41+0.41 km. respectively. In this context, we initially started with the equation of state (EoS) to model the dark energy, in which the dark energy density is proportional to the isotropic perfect fluid matter-energy density. The unknown constants present in the metric have been calculated by using the Darmois-Israel condition. We perform an in-depth analysis of the stability and force equilibrium of our proposed stellar configuration as well as multiple physical attributes of the model such as metric function, pressure, density, mass-radius relation, and dark energy parameters by varying dark energy coupling parameter alpha. Thus after a thorough theoretical analysis, we found that our proposed model is free from any singularity and also satisfies all stability criteria to be a stable and physically realistic stellar model.
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页数:16
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