Hunting for extra dimensions in black hole shadows

Abstract

Observational data of the Sagittarius A* (Sgr A*) shadow released by the Event Horizon Telescope (EHT) are used to investigate eventual deviations in the black hole shadow radius, aiming to seek physics beyond the Standard Model (SM) coming from extra-dimensional theory. We consider the brane-world scenario described by the Randall-Sundrum model and determine the black hole shadow radius correction owing to the higher dimension. From data of the shadow radius in units of BH mass determined by KECK- and VLTI-based estimates, we imposed restrictions on the deviation obtained, and one sets an upper limit to the curvature radius of Anti-de Sitter ($\mathrm{Ad}{\mathrm{S}}_5$) spacetime $\ell \lesssim 4.3\times 10^{-2}\mathrm{AU}$ (at $95\%$ confidence level).

Latex, 15 pages, 3 figures; version accepted in Physical Review D

References in corpus (13)

• First M87 Event Horizon Telescope Results. I. The Shadow of the Supermassive Black Hole
• First Sagittarius A* Event Horizon Telescope Results. I. The Shadow of the Supermassive Black Hole in the Center of the Milky Way
• First M87 Event Horizon Telescope Results. VI. The Shadow and Mass of the Central Black Hole
• First Sagittarius A* Event Horizon Telescope Results. VI: Testing the Black Hole Metric
• Review of short-range gravity experiments in the LHC era
• Constraints on extra dimensions from precision molecular spectroscopy
• An upper limit on the spin of SgrA${}^{\ast }$ based on stellar orbits in its vicinity
• Hunting extra dimensions in the shadow of Sgr A*
• Polar gravitational perturbations and quasinormal modes of a loop quantum gravity black hole
• Extra dimensions and atomic transition frequencies
• Note on fundamental physics tests from black hole imaging: Comment on "Hunting for extra dimensions in the shadow of Sagittarius A${}^{\ast }$"
• Exploring Extra Dimensions in Spectroscopy Experiments
• Spectroscopic tests for short-range modifications of Newtonian and post-Newtonian potentials