具有虫洞拓扑结构的狄拉克恒星

IF 2.8 4区 物理与天体物理 Q2 ASTRONOMY & ASTROPHYSICS
Vladimir Dzhunushaliev, Vladimir Folomeev, Sayabek Sakhiyev
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引用次数: 0

摘要

我们考虑由一个有引力的非线性旋量场和一个提供非平凡时空拓扑的无质量虚标量场组成的构型。对于这样一个混合系统,我们构造了描述具有虫洞拓扑结构的Dirac星的渐近平面非对称解族。这类系统的物理性质完全由三个输入量的值决定:旋量场的非线性参数、旋量频率和喉道参数。根据这些参数的具体值,结构可以是规则的或奇异的,并具有一个或两个喉道,以及它们可能包含不同种类的视界。此外,由于不对称性,在虫洞的两个渐近端点观察到的结构的质量和大小可能有很大的不同。对于非线性参数较大的负值,可以得到质量与钱德拉塞卡质量相当,有效半径为公里数量级的构型。
本文章由计算机程序翻译,如有差异,请以英文原文为准。

Dirac stars with wormhole topology

Dirac stars with wormhole topology

Dirac stars with wormhole topology

We consider configurations consisting of a gravitating nonlinear spinor field and a massless ghost scalar field providing a nontrivial spacetime topology. For such a mixed system, we have constructed families of asymptotically flat asymmetric solutions describing Dirac stars with wormhole topology. The physical properties of such systems are completely determined by the values of three input quantities: the nonlinearity parameter of the spinor field, the spinor frequency, and the throat parameter. Depending on the specific values of these parameters, the configurations may be regular or singular and possess one or two throats, as well as they may contain possible horizons of different kinds. Furthermore, because of the asymmetry, masses and sizes of the configurations observed at the two asymptotic ends of the wormhole may differ considerably. For large negative values of the nonlinearity parameter, it is possible to obtain configurations whose masses are comparable to the Chandrasekhar mass and effective radii are of the order of kilometers.

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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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