Sini, R; Kuriakose, V C(Cochin University of Science & Technology, September , 2008)
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Abstract:
The question of stability of black hole was first studied by Regge
and Wheeler who investigated linear perturbations of the exterior Schwarzschild spacetime. Further work on this problem led
to the study of quasi-normal modes which is believed as a characteristic sound of black holes. Quasi-normal modes (QNMs) describe
the damped oscillations under perturbations in the surrounding geometry of a black hole with frequencies and damping times of oscillations entirely fixed by the black hole parameters.In the present
work we study the influence of cosmic string on the QNMs of various
black hole background spacetimes which are perturbed by a massless
Dirac field.
Description:
Department of Physics,
Cochin University of Science and Technology