PAPPAS, Thomas, Kirill BRONNIKOV and Roman KONOPLYA. General parametrization of wormhole spacetimes. In RAGtime 23: 6-10 September, 2021 - Workshop on Black Holes and Neutron Stars. 2021.
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Basic information
Original name General parametrization of wormhole spacetimes
Authors PAPPAS, Thomas, Kirill BRONNIKOV and Roman KONOPLYA.
Edition RAGtime 23: 6-10 September, 2021 - Workshop on Black Holes and Neutron Stars, 2021.
Other information
Original language English
Type of outcome Presentations at conferences
Country of publisher Czech Republic
Confidentiality degree is not subject to a state or trade secret
WWW URL
Organization unit Institute of physics in Opava
Tags FÚ, FÚ2021, RAGtime 23
Tags International impact
Changed by Changed by: Ing. Petra Ryšavá, učo 5220. Changed: 12/11/2021 21:38.
Abstract
The general parametrization for spacetimes of spherically symmetric Lorentzian, traversable wormholes in an arbitrary metric theory of gravity is presented. The parametrization is similar in spirit to the post-Newtonian parametrized formalism, but with validity that extends beyond the weak field region and covers the whole space. Our method is based on a continued-fraction expansion in terms of a compactified radial coordinate. Calculations of shadows and quasinormal modes for various examples of parametrization of known wormhole metrics that we have performed show that, for most cases, the parametrization provides excellent accuracy already at the first order. Therefore, only a few parameters are dominant and important for finding potentially observable quantities in a wormhole background. We have also extended the analysis to the regime of slow rotation.
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