Quantum Gravity Effects around Sagittarius A*

Abstract

Recent VLBI observations have resolved Sagittarius A* at horizon scales. The Event Horizon Telescope is expected to provide increasingly good images of the region around the Schwarzschild radius $r_S$ of Sgr A* soon. A number of authors have recently pointed out the possibility that non-perturbative quantum gravitational phenomena could affect the space surrounding a black hole. Here we point out that the existence of a region around $\frac{7}{6}{r}_S$ where these effects should be maximal.

5 pages; Received honorable mention in the Gravity Research Foundation 2016 Awards for Essays on Gravitation

References in corpus (17)

• Black Holes: Complementarity or Firewalls?
• Viewing the Shadow of the Black Hole at the Galactic Center
• The fuzzball proposal for black holes: an elementary review
• Event-horizon-scale structure in the supermassive black hole candidate at the Galactic Centre
• Gravitational Vacuum Condensate Stars
• Testing the No-Hair Theorem with Observations in the Electromagnetic Spectrum: II. Black-Hole Images
• Black hole fireworks: quantum-gravity effects outside the horizon spark black to white hole tunneling
• Planck stars
• Testing the No-Hair Theorem with Event Horizon Telescope Observations of Sagittarius A*
• Realistic Observable in Background-Free Quantum Gravity: the Planck-Star Tunnelling-Time
• Fast Radio Bursts and White Hole Signals
• Possible observational windows for quantum effects from black holes
• Planck star phenomenology
• Phenomenology of bouncing black holes in quantum gravity: a closer look
• Bouncing black holes in quantum gravity and the Fermi gamma-ray excess
• High-Angular-Resolution and High-Sensitivity Science Enabled by Beamformed ALMA
• Black Hole Type Quantum Computing in Critical Bose-Einstein Systems

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• Phenomenological aspects of black holes beyond general relativity
• White Holes as Remnants: A Surprising Scenario for the End of a Black Hole
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• On the geometry of the black-to-white hole transition within a single asymptotic region
• The End of a Black Hole's Evaporation -- Part I
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• Constraints on self-dual black hole in loop quantum gravity with S0-2 star in the Galactic Center
• The End of a Black Hole's Evaporation -- Part II
• Interior metric and ray-tracing map in the firework black-to-white hole transition
• Quantum-induced trans-Planckian energy near horizon
• Black to white transition of a charged black hole
• Quantum gravity lights up spinning black holes
• Quasinormal modes of black holes in a toy-model for cumulative quantum gravity
• Fast radio bursts and the stochastic lifetime of black holes in quantum gravity
• Quantum fields in the background spacetime of a loop quantum gravity black hole
• Effects of primordial black holes quantum gravity decay on galaxy clustering
• The Good, the Bad, and the Ugly of Gravity and Information
• Measuring the last burst of non-singular black holes
• Suppression of proton decay in quantum gravity
• Constraints on the Scale Parameter of Regular Black Hole in Asymptotically Safe Gravity from Extreme Mass Ratio Inspirals