辐射恒星的时间演化动力学

IF 2.1 4区 物理与天体物理 Q2 ASTRONOMY & ASTROPHYSICS
S. D. Maharaj, K. S. Govinder
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引用次数: 0

摘要

我们研究了广义相对论中带电辐射恒星的动力学。恒星表面的结态条件导致将径向压力与热通量联系起来的限制。主方程化为决定时间演化的非线性二阶微分方程。通过相平面分析研究了其动力学行为,揭示了有趣的行为。电磁场和宇宙常数的存在都包括在我们的处理中。它们影响着引力恒星的时间演化。我们确定了导致星的稳定渐近终态的参数限制。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
Dynamics of the temporal evolution in radiating stars

We study the dynamics of a charged radiating star in general relativity. The junction conditions at the surface of the star lead to a restriction that connects the radial pressure to the heat flux. The master equation reduces to a nonlinear second order differential equation which determines the temporal evolution. The dynamical behaviour is studied via a phase plane analysis which reveals interesting behaviour. The presence of both the electromagnetic field and the cosmological constant are included in our treatment. They affect the temporal evolution of the gravitating star. We identify the restrictions on the parameters that lead to a stable asymptotic end state of the star.

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来源期刊
General Relativity and Gravitation
General Relativity and Gravitation 物理-天文与天体物理
CiteScore
4.60
自引率
3.60%
发文量
136
审稿时长
3 months
期刊介绍: General Relativity and Gravitation is a journal devoted to all aspects of modern gravitational science, and published under the auspices of the International Society on General Relativity and Gravitation. It welcomes in particular original articles on the following topics of current research: Analytical general relativity, including its interface with geometrical analysis Numerical relativity Theoretical and observational cosmology Relativistic astrophysics Gravitational waves: data analysis, astrophysical sources and detector science Extensions of general relativity Supergravity Gravitational aspects of string theory and its extensions Quantum gravity: canonical approaches, in particular loop quantum gravity, and path integral approaches, in particular spin foams, Regge calculus and dynamical triangulations Quantum field theory in curved spacetime Non-commutative geometry and gravitation Experimental gravity, in particular tests of general relativity The journal publishes articles on all theoretical and experimental aspects of modern general relativity and gravitation, as well as book reviews and historical articles of special interest.
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