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arXiv 0906.5568gr-qc
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共形耦合标量场的带电C-度量

Charged C-metric with conformally coupled scalar field

C. Charmousis, T. Kolyvaris, E. Papantonopoulos

摘要:

我们提出了一个推广的带电C-度规共形耦合的标量场的存在下的宇宙学常数。解是渐近平坦的或常曲率时空。时空度规具有通常的带电荷C度规的几何结构,带宇宙学常数,其中质量和电荷相等。当宇宙学常数不存在时,发现标量场只在事件视界的角极处爆炸。宇宙学常数的存在一般可以使度规是正则的地方的标量场是正则的,将奇点推到事件视界之外。对于某些具有负宇宙学常数的增强加速度的情况,圆锥奇点完全消失,标量场处处是正则的。于是黑洞更像是一个黑弦,它的事件视界一直延伸到渐近无穷大,并为自己提供必要的加速度。

英文摘要:

We present a generalisation of the charged C-metric conformally coupled with a scalar field in the presence of a cosmological constant. The solution is asymptotically flat or a constant curvature spacetime. The spacetime metric has the geometry of a usual charged C-metric with cosmological constant, where the mass and charge are equal. When the cosmological constant is absent it is found that the scalar field only blows up at the angular pole of the event horizon. The presence of the cosmological constant can generically render the scalar field regular where the metric is regular, pushing the singularity beyond the event horizon. For certain cases of enhanced acceleration with a negative cosmological constant, the conical singularity disappears all together and the scalar field is everywhere regular. The black hole is then rather a black string with its event horizon extending all the way to asymptotic infinity and providing itself the necessary acceleration.

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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