Constraints on black-hole charges with the 2017 EHT observations of M87∗
Journal article, 2021
Our understanding of strong gravity near supermassive compact objects has recently improved thanks to the measurements made by the Event Horizon Telescope (EHT). We use here the M87∗ shadow size to infer constraints on the physical charges of a large variety of nonrotating or rotating black holes. For example, we show that the quality of the measurements is already sufficient to rule out that M87∗ is a highly charged dilaton black hole. Similarly, when considering black holes with two physical and independent charges, we are able to exclude considerable regions of the space of parameters for the doubly-charged dilaton and the Sen black holes.
Author
Prashant Kocherlakota
Goethe University Frankfurt
Luciano Rezzolla
Goethe University Frankfurt
Trinity College Dublin
Heino Falcke
Radboud University
Christian M. Fromm
Harvard University
Goethe University Frankfurt
Harvard-Smithsonian Center for Astrophysics
John Conway
Chalmers, Space, Earth and Environment, Onsala Space Observatory
Michael Lindqvist
Chalmers, Space, Earth and Environment, Onsala Space Observatory
Physical Review D
2470-0010 (ISSN) 2470-0029 (eISSN)
Vol. 103 10 104047Subject Categories
Subatomic Physics
Astronomy, Astrophysics and Cosmology
DOI
10.1103/PhysRevD.103.104047