Theory-agnostic parametrization of wormhole spacetimes

Abstract

We present a generalization of the Rezzolla-Zhidenko theory-agnostic parametrization of black-hole spacetimes to accommodate spherically-symmetric Lorentzian, traversable wormholes (WHs) in an arbitrary metric theory of gravity. By applying our parametrization to various known WH metrics and performing calculations involving shadows and quasinormal modes, we show that only a few parameters are important for finding potentially observable quantities in a WH spacetime.

16 pages, 5 tables, 1 figure; contribution to the proceedings of the RAGtime conference in Opava. v2: Extended discussion, version to match the one to appear in Proceedings of RAGtime 23-25