Absorption cross section in warped AdS_3 black hole revisited

Abstract

We investigate the absorption cross section for minimal-coupled scalars in the warped AdS_3 black hole. According to our calculation, the cross section reduces to the horizon area in the low energy limit as usually expected in contrast to what was previously found. We also calculate the greybody factor and find that the effective temperatures for the two chiral CFT's are consistent with that derived from the quasinormal modes. Observing the conjectured warped AdS/CFT correspondence, we suspect that a specific sector of the CFT operators with the desired conformal dimension could be responsible for the peculiar thermal behaviour of the warped AdS_3 black hole.

16+1 pages, typos corrected, references and footnotes added

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• Superradiant instability and charged scalar quasinormal modes for $2+1$-dimensional Coulomb-like AdS black holes from nonlinear electrodynamics
• Real-time correlators in warped AdS/CFT correspondence
• String Theory on Warped AdS_3 and Virasoro Resonances
• Hidden Conformal Symmetry of Self-Dual Warped AdS_3 Black Holes in Topological Massive Gravity
• Hidden Conformal Symmetry of Warped AdS_3 Black Holes
• Area spectra versus entropy spectra in black holes in topologically massive gravity
• Quasinormal Modes, Stability Analysis and Absorption Cross Section for 4-dimensional Topological Lifshitz Black Hole
• Greybody factors for topological massless black holes
• Analytical studies of Hawking radiation and quasinormal modes in rotating linear dilatonic black hole
• Stability of warped AdS3 black holes in Topologically Massive Gravity under scalar perturbations
• Geometric Finiteness, Holography and Quasinormal Modes for the Warped AdS_3 Black Hole
• The Central Charge of the Warped AdS^3 Black Hole