Nonexistence of quasinormal modes in the extremal BTZ black hole

Details Nonexistence of quasinormal modes in the extremal BTZ black hole Nonexistence of quasinormal modes in the extremal BTZ black hole

2011-09-24

arxiv.org/abs/1109.5221v2

Astronomy and Astrophysics

Astrophysics

General Relativity and Quantum Cosmology

13 pages, 2 figures, references added

Scientific paper

We show that quasinormal modes cannot exist in the extremal BTZ black hole. For this purpose, we consider propagations of a minimally coupled scalar and a single massive graviton obtained from the cosmological topologically massive gravity on the extremal BTZ black hole. The would-be quasinormal modes for a scalar and graviton could not exist because it is impossible to make an ingoing flux into the extremal (degenerate) horizon. This is consistent with the argument that there is no propagating dynamics in the self-dual orbifold of AdS(3) which is just the near-horizon limit of the extremal BTZ black hole.

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