Charged Simpson-Visser-AdS spacetime: QPOs and observational constraints
Abstract
In this article, we examine particle dynamics and Quasi-periodic oscillations within a charged Simpson-Visser-Anti-de Sitter (AdS) spacetime. We first analyze the behavior of the metric and black hole horizons under the competing impact of electric charge Q, regularization parameter b, and AdS radius l. The roots of the metric function reveal transitions between three distinct topological classes: non-extremal configurations featuring distinct inner and outer horizons, extremal limits with a single degenerate horizon, and strictly positive, horizonless wormhole geometries. By evaluating the effective potential, we determine how this modified geometry shifts the Innermost Stable Circular Orbit (ISCO) and alters the angular momentum and energy of test particles. Moreover, we derive the Keplerian, radial, and vertical frequencies to model quasi-periodic oscillations (QPOs). We show that the interplay between the regularization parameter b and the AdS radius l significantly modifies twin-peak QPOs. In particular, b drives fundamental QPO frequencies higher than those predicted by standard general relativistic backgrounds. Twin-peak high-frequency QPO data from two black-hole binaries disfavor the Schwarzschild limit at ∼ 4σ, but constrain only a degenerate combination of charge and AdS curvature, leaving the regularization parameter entirely unconstrained by the data.
Related
- Dyonic Simpson Visser black-bounce spacetime surrounded by an exotic Einstein cluster in general relativity
- Testing charged Simpson-Visser-AdS spacetimes with twin-peak QPOs
- First-Law Entropy and a Degenerate Extremal Remnant in a Minimal-Length Simpson--Visser-Type Regular Black Hole: Geometrothermodynamics, Phase Structure, and Observational Discriminants
- Horizon Structure and Geodesic Properties of Simpson-Visser Black Holes in Einstein-Euler-Heisenberg Theory
- Shadows and Polarimetric Signatures of Rotating Simpson-Visser Black Holes with Thick Disk Illumination
BibTeX
@misc{khan2026charged,
title = {{Charged Simpson-Visser-AdS spacetime: QPOs and observational constraints}},
author = {Saeed Ullah Khan and Javlon Rayimbaev and Muhammad Zahid and Tolaniddin Nurmukhamedov and Abat Muratov and Weiwei Wang},
howpublished = {arXiv},
year = {2026},
month = sep,
doi = {10.48550/arxiv.2609.34443},
eprint = {2609.34443},
archivePrefix = {arXiv},
url = {https://arxiv.org/abs/2609.34443},
}
RIS
TY - UNPB
TI - Charged Simpson-Visser-AdS spacetime: QPOs and observational constraints
AU - Saeed Ullah Khan
AU - Javlon Rayimbaev
AU - Muhammad Zahid
AU - Tolaniddin Nurmukhamedov
AU - Abat Muratov
AU - Weiwei Wang
PY - 2026
DA - 2026/09/28
PB - arXiv
DO - 10.48550/arxiv.2609.34443
UR - https://arxiv.org/abs/2609.34443
AB - In this article, we examine particle dynamics and Quasi-periodic oscillations within a charged Simpson-Visser-Anti-de Sitter (AdS) spacetime. We first analyze the behavior of the metric and black hole horizons under the competing impact of electric charge Q, regularization parameter b, and AdS radius l. The roots of the metric function reveal transitions between three distinct topological classes: non-extremal configurations featuring distinct inner and outer horizons, extremal limits with a single degenerate horizon, and strictly positive, horizonless wormhole geometries. By evaluating the effective potential, we determine how this modified geometry shifts the Innermost Stable Circular Orbit (ISCO) and alters the angular momentum and energy of test particles. Moreover, we derive the Keplerian, radial, and vertical frequencies to model quasi-periodic oscillations (QPOs). We show that the interplay between the regularization parameter b and the AdS radius l significantly modifies twin-peak QPOs. In particular, b drives fundamental QPO frequencies higher than those predicted by standard general relativistic backgrounds. Twin-peak high-frequency QPO data from two black-hole binaries disfavor the Schwarzschild limit at ∼ 4σ, but constrain only a degenerate combination of charge and AdS curvature, leaving the regularization parameter entirely unconstrained by the data.
ER -