Constraints on black-hole charges with the 2017 EHT observations of M87∗

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Journal Title
Journal ISSN
Volume Title
A1 Alkuperäisartikkeli tieteellisessä aikakauslehdessä
Date
2021-05-20
Major/Subject
Mcode
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Language
en
Pages
18
Series
Physical Review D, Volume 103, issue 10
Abstract
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.
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Publisher Copyright: © 2021 authors. Published by the American Physical Society.
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Citation
Kocherlakota, P, Rezzolla, L, Falcke, H, Fromm, C M, Kramer, M, Mizuno, Y, Nathanail, A, Olivares, H, Younsi, Z, Akiyama, K, Alberdi, A, Alef, W, Algaba, J C, Anantua, R, Asada, K, Azulay, R, Baczko, A K, Ball, D, Baloković, M, Barrett, J, Benson, B A, Bintley, D, Blackburn, L, Blundell, R, Boland, W, Bouman, K L, Bower, G C, Boyce, H, Bremer, M, Brinkerink, C D, Brissenden, R, Britzen, S, Broderick, A E, Broguiere, D, Bronzwaer, T, Byun, D Y, Carlstrom, J E, Chael, A, Chan, C K, Chatterjee, S, Chatterjee, K, Chen, M T, Chen, Y, Chesler, P M, Cho, I, Christian, P, Kim, D J, Ramakrishnan, V, Savolainen, T, Wagner, J & Event Horizon Telescope Collaboration 2021, ' Constraints on black-hole charges with the 2017 EHT observations of M87∗ ', Physical Review D, vol. 103, no. 10, 104047 . https://doi.org/10.1103/PhysRevD.103.104047