Zipoy-Voorhees时空的引力俘获截面

IF 2.8 4区 物理与天体物理 Q2 ASTRONOMY & ASTROPHYSICS
Serzhan Momynov, Kuantay Boshkayev, Hernando Quevedo, Farida Belissarova, Anar Dalelkhankyzy, Aliya Taukenova, Ainur Urazalina, Daniya Utepova
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引用次数: 0

摘要

我们考虑由四极度规(q度规)描述的静态和轴对称致密物体引力场中有质量和无质量测试粒子的测地线,四极度规是史瓦西度规的最简单推广,包含一个独立的四极参数q。我们分析了有效势线,计算了测试粒子在该时空中的轨道参数并捕获了它们的横截面。此外,我们还推导出了光子逃逸角随四极参数的显式表达式。在四极子消失的相应极限下,所有的结果都归结为著名的史瓦西时空。我们认为,我们的结果可以用来研究现实的致密物体,如白矮星和中子星。
本文章由计算机程序翻译,如有差异,请以英文原文为准。

Gravitational capture cross-section in Zipoy-Voorhees spacetimes

Gravitational capture cross-section in Zipoy-Voorhees spacetimes

We consider geodesics of massive and massless test particles in the gravitational field of a static and axisymmetric compact object described by the quadrupolar metric (q-metric), which is the simplest generalization of the Schwarzschild metric, containing an independent quadrupole parameter q. We analyze the effective potential profile and calculate the orbital parameters and capture cross-sections of test particles in this spacetime. Moreover, we derive the explicit expression for the escape angle of photons as a function of the quadrupole parameter. All the results reduce in the corresponding limit of vanishing quadrupole to the well-known case of the Schwarzschild spacetime. We argue that our results could be used to investigate realistic compact objects such as white dwarfs and neutron stars.

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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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