IAR 05382
INSTITUTO ARGENTINO DE RADIOASTRONOMIA
Unidad Ejecutora - UE
artículos
Título:
A Nonthermal Bomb Explains the Near-infrared Superflare of Sgr A&z.ast
Autor/es:
CAFARDO, FABIO; NEMMEN, RODRIGO; GUTIÉRREZ, EDUARDO M.
Revista:
Astrophysical Journal Letters
Editorial:
Institute of Physics Publishing
Referencias:
Año: 2020 vol. 891
ISSN:
2041-8205
Resumen:
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.
