Epicyclic Oscillations around Simpson-Visser Regular Black Holes and Wormholes

TL;DR

This paper investigates epicyclic oscillations around Simpson-Visser regular black holes and wormholes, analyzing their potential to explain high-frequency quasi-periodic oscillations observed in astrophysical systems.

Contribution

It introduces a model of epicyclic frequencies in Simpson-Visser geometries and tests their effectiveness in fitting HF QPO observational data, especially for wormholes with high length parameter l.

Findings

Frequencies of orbital and epicyclic motion are derived for these geometries.

The model can improve HF QPO data fitting for wormholes with sufficiently high l.

Simpson-Visser geometries can potentially explain observed QPO phenomena.

Abstract

We study epicyclic oscillatory motion along circular geodesics of the Simpson--Visser meta-geometry describing in a unique way regular black-bounce black holes and reflection-symmetric wormholes by using a length parameter $l$. We give the frequencies of the orbital and epicyclic motion in a Keplerian disc with inner edge at the innermost circular geodesic located above the black hole outer horizon or on the our side of the wormhole. We use these frequencies in the epicyclic resonance version of the so-called geodesic models of high-frequency quasi-periodic oscillations (HF QPOs) observed in microquasars and around supermassive black holes in active galactic nuclei to test the ability of this meta-geometry to improve the fitting of HF QPOs observational data from the surrounding of supermassive black holes. We demonstrate that this is really possible for wormholes with sufficiently high length parameter $l$.