耗散坍缩过程中复杂性的微扰方法

IF 1.8 4区物理与天体物理 Q3 ASTRONOMY & ASTROPHYSICS Astrophysics and Space Science Pub Date : 2024-03-05 DOI:10.1007/s10509-024-04287-6

Megandhren Govender, Robert S. Bogadi, Wesley Govender, Narenee Mewalal

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引用次数: 0

摘要

辐射引力坍缩是天体物理学中一个重要的现象，也是研究得最多的现象。爱因斯坦的广义相对论（GR）非常适合描述这种过程，前提是非线性微分方程系统能够实现闭合。在微扰方案中，为了完成对辐射自引力系统的描述，我们使用了复杂因子消失的特性。我们的研究表明，可以得到一个物理上可行的模型，它反映了低密度系统不存在能量不均匀性，这与人们对更具侵蚀性的坍缩过程的预期形成了鲜明对比。

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A perturbative approach to complexity during dissipative collapse

Radiative gravitational collapse is an important and much studied phenomenon in astrophysics. Einstein’s theory of general relativity (GR) is well suited to describing such processes provided closure of the system of nonlinear differential equations is achieved. Within a perturbative scheme, the property of vanishing complexity factor is used in order to complete the description of the radiative, self-gravitating system. We show that a physically viable model may be obtained which reflects the absence of energy inhomogeneities for lower density systems, in contrast to what might be expected for more aggressive collapse processes.

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来源期刊

Astrophysics and Space Science 地学天文-天文与天体物理

CiteScore

3.40

自引率

5.30%

发文量

106

审稿时长

2-4 weeks

期刊介绍： Astrophysics and Space Science publishes original contributions and invited reviews covering the entire range of astronomy, astrophysics, astrophysical cosmology, planetary and space science and the astrophysical aspects of astrobiology. This includes both observational and theoretical research, the techniques of astronomical instrumentation and data analysis and astronomical space instrumentation. We particularly welcome papers in the general fields of high-energy astrophysics, astrophysical and astrochemical studies of the interstellar medium including star formation, planetary astrophysics, the formation and evolution of galaxies and the evolution of large scale structure in the Universe. Papers in mathematical physics or in general relativity which do not establish clear astrophysical applications will no longer be considered. The journal also publishes topically selected special issues in research fields of particular scientific interest. These consist of both invited reviews and original research papers. Conference proceedings will not be considered. All papers published in the journal are subject to thorough and strict peer-reviewing. Astrophysics and Space Science features short publication times after acceptance and colour printing free of charge.