Bumblebee black holes in light of Event Horizon Telescope observations

Abstract

We report the existence of novel static spherical black-hole solutions in a vector-tensor gravitational theory called the bumblebee gravity model which extends the Einstein-Maxwell theory by allowing the vector to nonminimally couple to the Ricci curvature tensor. A test of the solutions in the strong-field regime is performed for the first time using the recent observations of the supermassive black-hole shadows in the galaxy M87 and the Milky Way from the Event Horizon Telescope Collaboration. The parameter space is found largely unexcluded and more experiments are needed to fully bound the theory.

7 pages, 3 figures

References in corpus (5)

• First M87 Event Horizon Telescope Results. I. The Shadow of the Supermassive Black Hole
• Electrodynamics with Lorentz-violating operators of arbitrary dimension
• Signals for Lorentz Violation in Post-Newtonian Gravity
• The mass distribution in the Galactic Centre from interferometric astrometry of multiple stellar orbits
• Spontaneous Lorentz and Diffeomorphism Violation, Massive Modes, and Gravity

Cited by in corpus (1)

• Probing the Lorentz Invariance Violation via Gravitational Lensing and Analytical Eigenmodes of Perturbed Slowly Rotating Bumblebee Black Holes