Year: 2026
Type: article
Abstract: We investigate quasiperiodic oscillations (QPOs) from X-ray binaries as probes of rotating Ayón-Beato-García black hole (ABG) regular black holes. Within the relativistic precession model, we use Bayesian Markov Chain Monte Carlo (MCMC) analysis to constrain the black hole spin a / M , orbital radius r / M , mass M , and ABG charge parameter Q / M for five well studied X-ray binary systems: GRO J1655–40, GRS 1915+105, XTE J1550-564, H1743–322, and XTE J1859+226. Our results show that the dimensionless spin parameter is confined to a / M ∈ [0.15, 0.34], while the preferred orbital radius lies in the range r / M ∈ [5.45, 6.81]. The inferred black hole masses are consistent with the corresponding observational estimates for all five sources. We further obtain source-dependent upper limits on the ABG charge parameter. Under the baseline prior configuration, the smallest 95% credible upper endpoint is obtained for GRO J1655–40, Q / M < 0.1645, while the broad-prior analysis gives the conservative bound Q / M < 0.3951. Among the five systems, GRO J1655–40 exhibits the clearest posterior contraction and provides the strongest information on Q / M .
Source: Physics Letters B
Authors: Meng-He Wu, Xiao-Mei Kuang
Institutions: Neijiang Normal University, Yangzhou University
Language: English
Subfield: Astronomy and Astrophysics
Field: Physics and Astronomy
Domain: Physical Sciences
Open Access status: diamond
Awards: G2871406696, G4182537444, G7041550476
OpenAlex ID: W7221188467