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http://hdl.handle.net/10773/15045
Title: | Maxwell perturbations on asymptotically Anti-de-Sitter spacetimes: generic boundary conditions and a new branch of quasinormal modes |
Author: | Wang, Mengjie Herdeiro, Carlos Sampaio, Marco O. P. |
Issue Date: | 1-Dec-2015 |
Publisher: | American Physical Society |
Abstract: | Perturbations of asymptotically Anti-de-Sitter (AdS) spacetimes are often considered by imposing field vanishing boundary conditions (BCs) at the AdS boundary. Such BCs, of Dirichlet-type, imply a vanishing energy flux at the boundary, but the converse is, generically, not true. Regarding AdS as a gravitational box, we consider vanishing energy flux (VEF) BCs as a more fundamental physical requirement and we show that these BCs can lead to a new branch of modes. As a concrete example, we consider Maxwell perturbations on Kerr-AdS black holes in the Teukolsky formalism, but our formulation applies also for other spin fields. Imposing VEF BCs, we find a set of two Robin BCs, even for Schwarzschild-AdS black holes. The Robin BCs on the Teukolsky variables can be used to study quasinormal modes, superradiant instabilities and vector clouds. As a first application, we consider here the quasinormal modes of Schwarzschild-AdS black holes. We find that one of the Robin BCs yields the quasinormal spectrum reported in the literature, while the other one unveils a new branch for the quasinormal spectrum. |
Peer review: | yes |
URI: | http://hdl.handle.net/10773/15045 |
DOI: | 10.1103/PhysRevD.92.124006 |
ISSN: | 1550-2368 |
Appears in Collections: | CIDMA - Artigos DFis - Artigos GGDG - Artigos |
Files in This Item:
File | Description | Size | Format | |
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1510.04713v2.pdf | Main article | 582.93 kB | Adobe PDF | View/Open |
Maxwell perturbations.pdf | 352.27 kB | Adobe PDF |
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