General parametrization of wormhole spacetimes

@proceedings{53602,
   author = {Pappas, Thomas and Bronnikov, Kirill and Konoplya, Roman},
   booktitle = {RAGtime 23: 6-10 September, 2021 - Workshop on Black Holes and Neutron Stars},
   language = {eng},
   title = {General parametrization of wormhole spacetimes},
   url = {https://indico.slu.cz/event/8/contributions/94/},
   year = {2021}
}

TY  - CONF
ID  - 53602
AU  - Pappas, Thomas - Bronnikov, Kirill - Konoplya, Roman
PY  - 2021
TI  - General parametrization of wormhole spacetimes
UR  - https://indico.slu.cz/event/8/contributions/94/
N2  - 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.
ER  - 

PAPPAS, Thomas, Kirill BRONNIKOV a Roman KONOPLYA. General parametrization of wormhole spacetimes. In \textit{RAGtime 23: 6-10 September, 2021 - Workshop on Black Holes and Neutron Stars}. 2021.