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arXiv 1302.1399gr-qc
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黑洞与正宇宙学常数

Black holes and the positive cosmological constant

Sourav Bhattacharya

摘要:

我们讨论了具有正宇宙学常数的黑洞时空的某些方面,即位于宇宙学事件视界内的黑洞。首先建立了宇宙学事件视界存在的一般判据。利用为此建立的几何体系,我们研究了静态和定常轴对称时空中经典黑洞的无毛定理。我们讨论宇宙Nielsen-Olesen弦在Schwarzschild-de Sitter时空中的头发。我们还利用复路径分析给出了Killing视界的粒子产生的一般计算,并以此研究了黑洞和宇宙学事件视界在Schwarzschild-de Sitter时空中的粒子产生.

英文摘要:

We address some aspects of black hole spacetimes endowed with a positive cosmological constant, i.e. black holes located inside a cosmological event horizon. First we establish a general criterion for existence of cosmological event horizons. Using the geometrical set up built for this, we study classical black hole no hair theorems for both static and stationary axisymmetric spacetimes. We discuss cosmic Nielsen-Olesen strings as hair in Schwarzschild-de Sitter spacetime. We also give a general calculation for particle creation by a Killing horizon using complex path analysis and using this we study particle creation in Schwarzschild-de Sitter spacetime by both black hole and the cosmological event horizons.

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