Analysis of relativistic stellar model under the influence of dark energy equation of state

IF 1.9 4区物理与天体物理 Q2 ASTRONOMY & ASTROPHYSICS New Astronomy Pub Date : 2024-09-06 DOI:10.1016/j.newast.2024.102310

Ritika Joshi, Pratibha Fuloria, Pramesh Tamta

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Abstract

Dark energy, one of the mysterious and impactful forms of energy in the cosmos has a crucial role in propelling the rapid expansion of the cosmos. As a result it is highly likely that dark energy interacts with astrophysical objects in some direct or indirect way. The present paper introduces a simplified method to simulate the interaction between energy and conspicuous baryonic matter. It is accomplished by using a dense pulsar named PSRJ1614-2230 as a representative model star. The study involves solving Einsteins field equations within the stars interior using the Kuchowicz spacetime framework. The solutions obtained are then analyzed across physical as well as geometrical parameters such as metric potentials, pressure, density and energy conditions. Based on this analysis, it is suggested that the formation of the star embraced with dark energy equation of state exhibits stability. Importantly the proposed stellar model does not have any singularities, meets the stability criteria. Additionally, numerical results for the adiabatic and abreu index indicate that the model star displays stiffness and resilience against radial adiabatic perturbations.

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暗能量状态方程影响下的相对论恒星模型分析

暗能量是宇宙中神秘而有影响力的能量形式之一，在推动宇宙快速膨胀方面起着至关重要的作用。因此，暗能量极有可能以某种直接或间接的方式与天体物理物体相互作用。本文介绍了一种模拟能量与明显重子物质之间相互作用的简化方法。该方法以一颗名为 PSRJ1614-2230 的高密度脉冲星为代表模型星。这项研究包括利用 Kuchowicz 时空框架求解恒星内部的爱因斯坦场方程。然后根据物理和几何参数，如度量势、压力、密度和能量条件，对得到的解进行分析。在此分析基础上，提出了暗能量状态方程下恒星环抱的形成具有稳定性。重要的是，所提出的恒星模型没有任何奇点，符合稳定性标准。此外，绝热指数和阿布鲁指数的数值结果表明，模型恒星对径向绝热扰动表现出刚性和弹性。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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来源期刊

New Astronomy 地学天文-天文与天体物理

CiteScore

4.00

自引率

10.00%

发文量

109

审稿时长

13.6 weeks

期刊介绍： New Astronomy publishes articles in all fields of astronomy and astrophysics, with a particular focus on computational astronomy: mathematical and astronomy techniques and methodology, simulations, modelling and numerical results and computational techniques in instrumentation. New Astronomy includes full length research articles and review articles. The journal covers solar, stellar, galactic and extragalactic astronomy and astrophysics. It reports on original research in all wavelength bands, ranging from radio to gamma-ray.