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(Reference retrieved automatically from Web of Science through information on FAPESP grant and its corresponding number as mentioned in the publication by the authors.)

A Nonthermal Bomb Explains the Near-infrared Superflare of Sgr A{*}

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Gutierrez, Eduardo M. [1] ; Nemmen, Rodrigo [2] ; Cafardo, Fabio [2]
Total Authors: 3
[1] CONICET CIC, CCT La Plata, IAR, CC 5, RA-1984 Buenos Aires, DF - Argentina
[2] Univ Sao Paulo, Inst Astron Geofis & Ciencias Atmosfer, Dept Astron, BR-05508090 Sao Paulo, SP - Brazil
Total Affiliations: 2
Document type: Journal article
Source: Astrophysical Journal Letters; v. 891, n. 2 MAR 10 2020.
Web of Science Citations: 0

The Galactic center supermassive black hole, Sgr A{*}, has experienced a strong, unprecedented flare in 2019 May when its near-infrared luminosity reached much brighter levels than ever measured. We argue that an explosive event of particle acceleration to nonthermal energies in the innermost parts of the accretion flow-a nonthermal bomb-explains the near-infrared light curve. We discuss potential mechanisms that could explain this event such as magnetic reconnection and relativistic turbulence acceleration. Multiwavelength monitoring of such superflares in radio, infrared, and X-rays should allow a concrete test of the nonthermal bomb model and put better constraints on the mechanism that triggered the bomb. (AU)

FAPESP's process: 17/01461-2 - The extreme universe: black holes and the Fermi telescope
Grantee:Rodrigo Nemmen da Silva
Support type: Research Grants - Young Investigators Grants