arXivDaily arXiv每日学术速递 周一至周五更新
arXiv 2003.13730gr-qcastro-ph.CO
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K-本质模型的临界崩溃

Critical collapse in K-essence models

Radouane Gannouji, Yolbeiker Rodríguez Baez

摘要:

研究了具有位移对称性的K-本质模型中的引力坍缩。对于这些模型,我们有两种类型的地平线,事件和声波的形成。对于特殊情况$K(X)=X+βX^2$,我们发现三种不同的制度。在弱场区,标量场分散到无穷远,在非常强的区,两个视界同时形成,最后对于中间区,声波视界可以首先形成或两个视界同时形成。发现黑洞形成的阈值在声波视界首先形成的区域。我们观察到一个普遍的行为与标度参数$γ\simeq 0.51$。有趣的是,在黑洞形成以及事件视界出现之前,这种普遍的行为就已经被编码在声波视界中了。

英文摘要:

We study gravitational collapse in K-essence model with shift symmetry. For these models, we have the formation of two types of horizons, event and sonic. For the particular case $K(X)=X+βX^2$ we found three different regimes. In the weak field regime the scalar field disperses to infinity, in the very strong regime both horizons form at the same time and finally for the intermediate regime, the sonic horizon could form first or both horizons form at the same time. The threshold of formation of black hole is found in the regime where the sonic horizon forms first. We observe a universal behavior with scaling parameter $γ\simeq 0.51$. Interestingly this universal behavior is already encoded in the sonic horizon much before the black hole forms and therefore the emergence of the event horizon.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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