Can a naked singularity be formed during the gravitational collapse of a Janis-Newman-Winicour solution?

IF 0.9 4区 物理与天体物理 Q3 PHYSICS, MULTIDISCIPLINARY
Xiao Yan Chew, Il Gyeong Choi, Hyuk Jung Kim, Dong-han Yeom
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引用次数: 0

Abstract

The Janis-Newman-Winicour (JNW) spacetime possesses a naked singularity, although it represents an exact particle-like solution to the Einstein-Klein-Gordon theory with a massless scalar field. Here, we investigate the possible formation of a naked singularity in the JNW spacetime, using the thin-shell approximation to describe the gravitational collapse. By introducing different matter contents to construct thin-shells, we demonstrate the impossibility of naked singularity formation during the gravitational collapse unless the causality or null energy condition of the thin-shell is violated. Therefore, forming a visible naked singularity is impossible, and the weak cosmic censorship is satisfied.

Abstract Image

Abstract Image

在Janis-Newman-Winicour解的引力坍缩过程中,裸奇点能形成吗?
Janis-Newman-Winicour (JNW)时空拥有一个裸奇点,尽管它代表了爱因斯坦-克莱因-戈登理论在无质量标量场中的精确类粒子解。在这里,我们研究了JNW时空中裸奇点的可能形成,使用薄壳近似来描述引力坍缩。通过引入不同的物质含量来构造薄壳,我们证明了除非违反薄壳的因果关系或零能条件,否则在引力坍缩过程中不可能形成裸奇点。因此,形成一个可见的裸奇点是不可能的,弱宇宙审查是满足的。
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来源期刊
Journal of the Korean Physical Society
Journal of the Korean Physical Society PHYSICS, MULTIDISCIPLINARY-
CiteScore
1.20
自引率
16.70%
发文量
276
审稿时长
5.5 months
期刊介绍: The Journal of the Korean Physical Society (JKPS) covers all fields of physics spanning from statistical physics and condensed matter physics to particle physics. The manuscript to be published in JKPS is required to hold the originality, significance, and recent completeness. The journal is composed of Full paper, Letters, and Brief sections. In addition, featured articles with outstanding results are selected by the Editorial board and introduced in the online version. For emphasis on aspect of international journal, several world-distinguished researchers join the Editorial board. High quality of papers may be express-published when it is recommended or requested.
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