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arXiv 1209.3567gr-qchep-th
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带电规则黑洞的新解及其稳定性

New solutions of charged regular black holes and their stability

Nami Uchikata, Shijun Yoshida, Toshifumi Futamase

摘要:

通过将de Sitter解和Reissner-Nordstrom解与类时薄壳匹配,构造了新的正则黑洞解.薄壳被假定为有质量但没有压力,并且服从从Israel的连接条件导出的运动方程。通过研究壳层的运动方程,得到了带电规则黑洞的定态解,并检验了解的稳定性。在0.87 L < m <1.99 L的有限范围内找到了定态解,当M>0时,定态解对壳的小径向位移是稳定的,m,M和Q是固定值,其中L是de Sitter视界半径,m是黑洞质量,M是壳的固有质量,Q是黑洞荷。所有得到的溶液都是高电荷的,Q/m >0.866。在现有的正则黑洞解中,取壳层的无质量极限,得到了Lemos和Zanchin所得到的带无质量壳层的带电正则黑洞,并研究了其解的稳定性.我们发现,由当前正则黑洞解的无质量极限给出的Lemos和Zanchin正则黑洞解允许稳定解,而稳定解是由M -> 0的极限得到的。

英文摘要:

We construct new regular black hole solutions by matching the de Sitter solution and the Reissner-Nordstrom solution with a timelike thin shell. The thin shell is assumed to have mass but no pressure and obeys an equation of motion derived from Israel's junction conditions. By investigating the equation of motion for the shell, we obtain stationary solutions of charged regular black holes and examine stability of the solutions. Stationary solutions are found in limited ranges of 0.87L < m < 1.99L, and they are stable against small radial displacement of the shell with fixed values of m, M, and Q if M>0, where L is the de Sitter horizon radius, m the black hole mass, M the proper mass of the shell and Q the black hole charge. All the solutions obtained are highly charged in the sense of Q/m >0.866. By taking the massless limit of the shell in the present regular black hole solutions, we obtain the charged regular black hole with a massless shell obtained by Lemos and Zanchin and investigate stability of the solutions. It is found that Lemos and Zanchin's regular black hole solutions given by the massless limit of the present regular black hole solutions permit stable solutions, which are obtained by the limit of M -> 0.

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