Abstract
Hawking radiation effect of Maxwell’s electromagnetic fields in the Kerr-Newman black hole space-time is investigated using two different tortoise coordinate transformations. It has been shown that the new tortoise coordinate transformation produces constant term ξ in the expression of surface gravity and Hawking temperature. If ξ is set to zero, the surface gravity and Hawking temperature will be equal to those obtained from the old tortoise coordinate transformation. This indicates that new transformation is more reliable and accurate. The black body radiant spectrum of photon displays a new spin-rotation coupling effect.
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Acknowledgements
The author would like to thank Prof. Ng. Ibohal for making expertise in the field. This work is supported by the University Grants Commission, North Eastern Regional Office, Guwahati, India, vide letter no. F.5-239/2011-12/MRP/NERO/10755.
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Ibungochouba Singh, T. Hawking radiation of Kerr-Newman black hole in different tortoise coordinate transformations. Astrophys Space Sci 347, 271–276 (2013). https://doi.org/10.1007/s10509-013-1512-4
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DOI: https://doi.org/10.1007/s10509-013-1512-4