A nonthermal bomb explains the near-infrared superflare of Sgr A*

The Galactic center supermassive black hole, Sgr A*, has experienced a strong, unprecedented flare in May 2019 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...

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Detalles Bibliográficos
Autores principales: Gutiérrez, Eduardo Mario, Nemmen, Rodrigo S., Cafardo, Fabio
Formato: Articulo Preprint
Lenguaje:Inglés
Publicado: 2020
Materias:
Astronomía
Galactic center
Black hole physics
Non-thermal radiation sources
Accretion
Acceso en línea:http://sedici.unlp.edu.ar/handle/10915/139207
Aporte de:
SEDICI (UNLP) de Universidad Nacional de La Plata
id I19-R120-10915-139207
record_format dspace
institution Universidad Nacional de La Plata
institution_str I-19
repository_str R-120
collection SEDICI (UNLP)
language Inglés
topic Astronomía
Galactic center
Black hole physics
Non-thermal radiation sources
Accretion
spellingShingle Astronomía
Galactic center
Black hole physics
Non-thermal radiation sources
Accretion
Gutiérrez, Eduardo Mario
Nemmen, Rodrigo S.
Cafardo, Fabio
A nonthermal bomb explains the near-infrared superflare of Sgr A*
topic_facet Astronomía
Galactic center
Black hole physics
Non-thermal radiation sources
Accretion
description The Galactic center supermassive black hole, Sgr A*, has experienced a strong, unprecedented flare in May 2019 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-IR 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.
format Articulo
Preprint
author Gutiérrez, Eduardo Mario
Nemmen, Rodrigo S.
Cafardo, Fabio
author_facet Gutiérrez, Eduardo Mario
Nemmen, Rodrigo S.
Cafardo, Fabio
author_sort Gutiérrez, Eduardo Mario
title A nonthermal bomb explains the near-infrared superflare of Sgr A*
title_short A nonthermal bomb explains the near-infrared superflare of Sgr A*
title_full A nonthermal bomb explains the near-infrared superflare of Sgr A*
title_fullStr A nonthermal bomb explains the near-infrared superflare of Sgr A*
title_full_unstemmed A nonthermal bomb explains the near-infrared superflare of Sgr A*
title_sort nonthermal bomb explains the near-infrared superflare of sgr a*
publishDate 2020
url http://sedici.unlp.edu.ar/handle/10915/139207
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