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Covariant Anomaly and Hawking Radiation from Kerr-Newman Black Hole in Dragging Coordinates Frame
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作者 LIU Xiong-Wei ZENG Xiao-Xiong CHEN Shi-Wu LIN Kai YANG Shu-Zheng 《Communications in Theoretical Physics》 SCIE CAS CSCD 2008年第8期541-544,共4页
In the light of Robinson and Wilczek's new idea,and motivated by Banerjee and Kulkarni's simplified method of using only the covariant anomaly to derive Hawking radiation from a black hole,we generally extend ... In the light of Robinson and Wilczek's new idea,and motivated by Banerjee and Kulkarni's simplified method of using only the covariant anomaly to derive Hawking radiation from a black hole,we generally extend the work to Kerr-Newman black hole in dragging coordinates frame.It is shown that the flows introduced to cancel the anomaly at the event horizon are equal to the corresponding Hawking radiation in dragging coordinates frame,which supports and extends Robinson and Wilczek's opinion. 展开更多
关键词 Hawking radiation ANOMALY dragging coordinates frame Kerr-Newman black hole
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Hawking Radiation from Horizons of Reissner-Nordstrm de Sitter Black Hole with a Global Monopole via Anomalies
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作者 CHEN Shi-Wu LIU Xiong-Wei LIN Kai ZENG Xiao-Xiong YANG Shu-Zheng 《Communications in Theoretical Physics》 SCIE CAS CSCD 2008年第8期537-540,共4页
Hawking radiation from cosmological horizon and event horizon of the Reissner-Nordstrom de Sitter black hole with a global monopole is studied via a new method that was propounded by Robinson and Wilzek and elaborated... Hawking radiation from cosmological horizon and event horizon of the Reissner-Nordstrom de Sitter black hole with a global monopole is studied via a new method that was propounded by Robinson and Wilzek and elaborated by Banerjee and Kulkarni. The results show that the gauge current and energy-momentum tensor fluxes, which required keeping gauge covariance and general coordinate invariance at the quantum level in the effective field theory, are exactly equivalent to those of Hawking radiation from the event horizon and the cosmological horizon, respectively. 展开更多
关键词 covariant anomaly Hawking radiation Reissner-Nordstrom de sitter black hole global monopole
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Numerical Solution of Scalar Field for Nariai Case in 5D Ricci-Flat SdS Black String Space with Polynomial Approximation
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作者 WANG Chun-Xiao LIU Mo-Lin LIU Hong-Ya 《Communications in Theoretical Physics》 SCIE CAS CSCD 2008年第10期889-892,共4页
As one exact candidate of the higher dimensional black hole, the 5D Ricci-flat Schwarzsehild-de Sitter black string space presents something interesting. In this paper, we give a numerical solution to the real scalar ... As one exact candidate of the higher dimensional black hole, the 5D Ricci-flat Schwarzsehild-de Sitter black string space presents something interesting. In this paper, we give a numerical solution to the real scalar field around the Nariai black hole by the polynomial approximation. Unlike the previous tangent approximation, this fitting function makes a perfect match in the leading intermediate region and gives a good description near both the event and the cosmological horizons. We can read from our results that the wave is close to a harmonic one with the tortoise coordinate. Furthermore, with the actual radial coordinate the waves pile up almost equally near the both horizons. 展开更多
关键词 black string real scalar field Nariai black hole polynomial approximation
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