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Artículo

Nonthermal processes in hot accretion flows onto supermassive black holes: an inhomogeneous model

Gutiérrez, Eduardo MarioIcon ; Vieyro, Florencia LauraIcon ; Romero, Gustavo EstebanIcon
Fecha de publicación: 05/2021
Editorial: EDP Sciences
Revista: Astronomy and Astrophysics
ISSN: 0004-6361
Idioma: Inglés
Tipo de recurso: Artículo publicado
Clasificación temática:
Astronomía

Resumen

Context. Many low-redshift active galactic nuclei harbor a supermassive black hole accreting matter at low or medium rates. At such rates, the accretion flow usually consists of a cold optically thick disk, plus a hot, low density, collisionless corona. In the latter component, charged particles can be accelerated to high energies by various mechanisms. Aims. We aim to investigate, in detail, nonthermal processes in hot accretion flows onto supermassive black holes, covering a wide range of accretion rates and luminosities. Methods. We developed a model consisting of a thin Shakura-Sunyaev disk plus an inner hot accretion flow or corona, modeled as a radiatively inefficient accretion flow, where nonthermal processes take place. We solved the transport equations for relativistic particles and estimated the spectral energy distributions resulting from nonthermal interactions between the various particle species and the fields in the source. Results. We covered a variety of scenarios, from low accretion rates up to 10% of the Eddington limit, and identified the relevant cooling mechanisms in each case. The presence of hadrons in the hot flow is decisive for the spectral shape, giving rise to secondary particles and gamma-ray cascades. We applied our model to the source IC 4329A, confirming earlier results which showed evidence of nonthermal particles in the corona.
Palabras clave: ACCRETION, ACCRETION DISKS , BLACK HOLE PHYSICS , GALAXIES: ACTIVE , RADIATION MECHANISMS: NON-THERMAL , RELATIVISTIC PROCESSES
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info:eu-repo/semantics/openAccess Excepto donde se diga explícitamente, este item se publica bajo la siguiente descripción: Creative Commons Attribution-NonCommercial-ShareAlike 2.5 Unported (CC BY-NC-SA 2.5)
Identificadores
URI: http://hdl.handle.net/11336/146037
DOI: http://dx.doi.org/10.1051/0004-6361/202039671
URL: https://www.aanda.org/articles/aa/abs/2021/05/aa39671-20/aa39671-20.html
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Articulos(IAR)
Articulos de INST.ARG.DE RADIOASTRONOMIA (I)
Citación
Gutiérrez, Eduardo Mario; Vieyro, Florencia Laura; Romero, Gustavo Esteban; Nonthermal processes in hot accretion flows onto supermassive black holes: an inhomogeneous model; EDP Sciences; Astronomy and Astrophysics; 649; A87; 5-2021; 1-15
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