在能量动量平方引力中承认诺特对称的致密恒星

IF 1.6 4区 物理与天体物理 Q3 ASTRONOMY & ASTROPHYSICS Advances in Astronomy Pub Date : 2021-01-26 DOI:10.1155/2021/6663502
M. Sharif, M. Z. Gul
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引用次数: 13

摘要

本文通过能量-动量平方引力中的Noether对称性方法研究了致密恒星物体的几何结构。这一新发展的理论克服了大爆炸奇点的问题,并在早期宇宙中提供了可行的宇宙学结果。此外,它的含义发生在高曲率区域,在那里能量动量平方重力与广义相对论的偏差得到了证实。我们考虑了这个修正理论的最小耦合模型,并公式化了对称生成器以及相应的守恒量。我们使用守恒关系,并应用一些合适的初始条件来评估度量势。最后,我们通过数值分析探讨了紧凑对象的一些有趣特征,以获得适当的模型参数值。研究发现,在这个特定的框架中,致密恒星物体取决于模型参数和守恒量。我们得出的结论是,Noether对称性产生的解与天体物理观测数据一致,从而证实了这一过程的可行性。
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Compact Stars Admitting Noether Symmetries in Energy-Momentum Squared Gravity
This paper investigates the geometry of compact stellar objects through the Noether symmetry approach in the energy-momentum squared gravity. This newly developed theory overcomes the problems of big bang singularity and provides the viable cosmological consequences in the early time universe. Moreover, its implications occur in high curvature regime where the deviations of energy-momentum squared gravity from general relativity is confirmed. We consider the minimal coupling model of this modified theory and formulate symmetry generators as well as corresponding conserved quantities. We use conservation relation and apply some suitable initial conditions to evaluate the metric potentials. Finally, we explore some interesting features of the compact objects for appropriate values of the model parameters through numeric analysis. It is found that compact stellar objects in this particular framework depend on the model parameters as well as conserved quantities. We conclude that Noether symmetries generate solutions that are consistent with the astrophysical observational data and hence confirm the viability of this procedure.
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来源期刊
Advances in Astronomy
Advances in Astronomy ASTRONOMY & ASTROPHYSICS-
CiteScore
2.70
自引率
7.10%
发文量
10
审稿时长
22 weeks
期刊介绍: Advances in Astronomy publishes articles in all areas of astronomy, astrophysics, and cosmology. The journal accepts both observational and theoretical investigations into celestial objects and the wider universe, as well as the reports of new methods and instrumentation for their study.
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