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Active galactic nuclei on parsec scales

AuthorsAgudo, Iván ; Alberdi, Antxón ; Alonso-Herrero, A. ; Gómez Fernández, J. L. ; Márquez, Isabel ; Masegosa, Josefa ; Prieto, Almudena; Ramos-Almeida, Cristina; Ros, Eduardo
Issue Date2015
PublisherSociedad Española de Astronomía
CitationThe Spanish Square Kilometre Array White Book: 88-100 (2015)
AbstractThe nuclei of active galaxies are the most powerful long-lived sources of radiation in the Universe. They often outshine the host galaxy in which they reside and are able to eject outflows or jets of relativistic plasma that emit all the way from radio waves to the highest energetic gamma rays. To understand the mechanisms that govern AGN we have to go down to parsec or sub-parsec scales, where a central engine formed by a supermassive black hole and a surrounding accretion disc produces helical magnetic fields in which jets are thought to originate. The exact role of the magnetic field and its structure, the composition and dynamics of the ejected jets, as well as the feedback effect of the jets on the gas and dust that surrounds the central engine are however still far from understood. The SKA, with its superb sensitivity and polarization capabilities, will allow for a relevant advance on the field of relativistic jets and in active galactic nuclei and their connexion with the fueling material and star formation present in the vicinity of the central supermassive black hole.
Descriptionet al.
Identifiersisbn: 978-84-606-8955-3
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(IFCA) Libros y partes de libros
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