Constraints on black-hole charges with the 2017 EHT observations of M87*
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Date
Authors
Kocherlakota, Prashant
Rezzolla, Luciano
Falcke, Heino
Fromm, Christian M.
Kramer, Michael
Mizuno, Yosuke
Nathanail, Antonios
Olivares, Hector
Younsi, Ziri
Akiyama, Kazunori
Journal Title
Journal ISSN
Volume Title
Publisher
American Physical Society
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.
Description
This paper has made use of the following APEX data: Project ID T-091.F-0006- 2013. APEX is a collaboration between the Max-Planck- Institut für Radioastronomie (Germany), ESO, and the Onsala Space Observatory (Sweden).
Keywords
Constraints, Black-hole, 2017 EHT, M87, Event Horizon Telescope (EHT)
Sustainable Development Goals
Citation
Kocherlakota, P., Rezzolla, L., Falcke, H. et al. 2021, 'Constraints on black-hole charges with the 2017 EHT observations of M87*', Physical review, vol. 103, no. 10, art. 104047, pp. 1-18, doi : 10.1103/PhysRevD.103.104047.