Intermediate behavior of Kerr tails - INSU - Institut national des sciences de l'Univers Accéder directement au contenu
Article Dans Une Revue General Relativity and Gravitation Année : 2014

Intermediate behavior of Kerr tails

Résumé

The numerical investigation of wave propagation in the asymptotic domain of Kerr spacetime has only recently been possible thanks to the construction of suitable hyperboloidal coordinates. The asymptotics revealed an apparent puzzle in the decay rates of scalar fields: the late-time rates seemed to depend on whether finite distance observers are in the strong field domain or far away from the rotating black hole, an apparent phenomenon dubbed "splitting". We discuss far-field "splitting" in the full field and near-horizon "splitting" in certain projected modes using horizon-penetrating, hyperboloidal coordinates. For either case we propose an explanation to the cause of the "splitting" behavior, and we determine uniquely decay rates that previous studies found to be ambiguous or immeasurable. The far-field "splitting" is explained by competition between projected modes. The near-horizon "splitting" is due to excitation of lower multipole modes that back excite the multipole mode for which "splitting" is observed. In both cases "splitting" is an intermediate effect, such that asymptotically in time strong field rates are valid at all finite distances. At any finite time, however, there are three domains with different decay rates whose boundaries move outwards during evolution. We then propose a formula for the decay rate of tails that takes into account the inter--mode excitation effect that we study.
Fichier principal
Vignette du fichier
1208.5839v3.pdf (850.11 Ko) Télécharger le fichier
Origine : Fichiers produits par l'(les) auteur(s)
Loading...

Dates et versions

insu-01257902 , version 1 (18-01-2016)

Licence

Paternité - Pas d'utilisation commerciale - Pas de modification

Identifiants

Citer

Anil Zenginoğlu, Gaurav Khanna, Lior M. Burko. Intermediate behavior of Kerr tails. General Relativity and Gravitation, 2014, 46 (3), pp.1672. ⟨10.1007/s10714-014-1672-8⟩. ⟨insu-01257902⟩
269 Consultations
110 Téléchargements

Altmetric

Partager

Gmail Facebook X LinkedIn More