Wednesday, June 26, 2013

1306.5974 (Ramon Becar et al.)

Dirac quasinormal modes of Chern-Simons and BTZ black holes with torsion    [PDF]

Ramon Becar, P. A. Gonzalez, Y. Vasquez
We study Chern-Simons black holes in d-dimensions and we calculate analytically the quasinormal modes of fermionic perturbations. Also, we consider as background five-dimensional Chern-Simons black hole with torsion and BTZ black hole with torsion. We have found that the quasinormal modes depend on the highest power of curvature present in the Chern-Simons theory, such as occurs for the quasinormal modes of scalar perturbations. The effect of the torsion is to modify the real part of the quasinormal frequencies, which modify the oscillation frequency of the field, for the five-dimensional case. However, for BTZ black hole with torsion, the effect is to modify the imaginary part of these frequencies, that is the relaxation time for the decay of the black hole perturbation.
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