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dc.contributor.authorBianchi, Stefano
dc.contributor.authorMaiolino, Roberto
dc.contributor.authorRisaliti, Guido
dc.date.accessioned2017-10-03T07:42:37Z
dc.date.available2017-10-03T07:42:37Z
dc.date.issued2012-2-16
dc.identifier.citationStefano Bianchi, Roberto Maiolino, and Guido Risaliti, “AGN Obscuration and the Unified Model,” Advances in Astronomy, vol. 2012, Article ID 782030, 17 pages, 2012. doi:10.1155/2012/782030
dc.identifier.urihttps://www.repository.cam.ac.uk/handle/1810/267590
dc.description.abstractUnification Models of Active Galactic Nuclei postulate that all the observed differences between type 1 and type 2 objects are due to orientation effects with respect to the line of sight to the observer. The key ingredient of these models is the obscuring medium, historically envisaged as a toroidal structure on a parsec scale. However, many results obtained in the last few years are clearly showing the need for a more complex geometrical distribution of the absorbing media. In this paper, we review the various pieces of evidence for obscuring media on different scales, from the vicinity of the black hole to the host galaxy, in order to picture an updated unification scenario explaining the complex observed phenomenology. We conclude by mentioning some of the open issues.
dc.rightsAll Rights Reserveden
dc.rights.urihttps://www.rioxx.net/licenses/all-rights-reserved/en
dc.titleAGN Obscuration and the Unified Model
dc.typeArticle
dc.date.updated2017-07-13T08:37:40Z
dc.description.versionPeer Reviewed
dc.language.rfc3066en
dc.rights.holderCopyright © 2012 Stefano Bianchi et al. This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.
dc.identifier.doi10.17863/CAM.13529
rioxxterms.versionofrecord10.1155/2012/782030


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