Stratification in polarization and Faraday rotation in the jet of 3C 120

5 pages, 3 figures.

Detalles Bibliográficos
Autores: Gómez Fernández, José L., Agudo, Iván, Marscher, Alan P., Jorstad, Svetlana G., Roca-Sogorb, Mar
Tipo de recurso: artículo
Fecha de publicación:2008
País:España
Institución:Consejo Superior de Investigaciones Científicas (CSIC)
Repositorio:DIGITAL.CSIC. Repositorio Institucional del CSIC
OAI Identifier:oai:digital.csic.es:10261/20584
Acceso en línea:http://hdl.handle.net/10261/20584
Access Level:acceso abierto
Palabra clave:Galaxies: active
Galaxies: individual (3C 120)
Galaxies: jets
Polarization
Radio continuum: galaxies
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repository_id_str
spelling Stratification in polarization and Faraday rotation in the jet of 3C 120Gómez Fernández, José L.Agudo, IvánMarscher, Alan P.Jorstad, Svetlana G.Roca-Sogorb, MarGalaxies: activeGalaxies: individual (3C 120)Galaxies: jetsPolarizationRadio continuum: galaxies5 pages, 3 figures.Very long baseline interferometric observations of the radio galaxy 3C 120 show a systematic presence of gradients in Faraday rotation and degree of polarization across and along the jet. These are revealed by the passage of multiple superluminal components throughout the jet as they move out from the core in a sequence of 12 monthly polarimetric observations taken with the VLBA at 15, 22, and 43 GHz. The degree of polarization has an asymmetric profile in which the northern side of the jet is more highly polarized. The Faraday rotation measure is also stratified across the jet width, with larger values for the southern side. Superposed on this structure we find a localized region of high Faraday rotation measure ( 6000 rad m2) between approximately 3 and 4 mas from the core. This region of enhanced Faraday rotation may result from the interaction of the jet with the ambient medium, which may also explain the stratification in degree of polarization. The data are also consistent with a helical magnetic field in a two-fluid jet model, consisting of an inner emitting jet and a sheath of nonrelativistic electrons.This research has been supported by the Spanish Ministerio de Educación y Ciencia and the European Fund for Regional Development through grants AYA2004-08067-C03- 03 and AYA2007-67627-C03-03, and by National Science Foundation grant AST-0406865. I. A. acknowledges support by an I3P contract by the Spanish Consejo Superior de Investigaciones Científicas.Peer reviewedSocietà astronomica italiana201020102008info:eu-repo/semantics/articlehttp://purl.org/coar/resource_type/c_6501566322 bytesapplication/pdfhttp://hdl.handle.net/10261/20584reponame:DIGITAL.CSIC. Repositorio Institucional del CSICinstname:Consejo Superior de Investigaciones Científicas (CSIC)Ingléshttp://sait.oat.ts.astro.it/MSAIt790408/index.htmlinfo:eu-repo/semantics/openAccessoai:digital.csic.es:10261/205842026-05-22T06:33:51Z
dc.title.none.fl_str_mv Stratification in polarization and Faraday rotation in the jet of 3C 120
title Stratification in polarization and Faraday rotation in the jet of 3C 120
spellingShingle Stratification in polarization and Faraday rotation in the jet of 3C 120
Gómez Fernández, José L.
Galaxies: active
Galaxies: individual (3C 120)
Galaxies: jets
Polarization
Radio continuum: galaxies
title_short Stratification in polarization and Faraday rotation in the jet of 3C 120
title_full Stratification in polarization and Faraday rotation in the jet of 3C 120
title_fullStr Stratification in polarization and Faraday rotation in the jet of 3C 120
title_full_unstemmed Stratification in polarization and Faraday rotation in the jet of 3C 120
title_sort Stratification in polarization and Faraday rotation in the jet of 3C 120
dc.creator.none.fl_str_mv Gómez Fernández, José L.
Agudo, Iván
Marscher, Alan P.
Jorstad, Svetlana G.
Roca-Sogorb, Mar
author Gómez Fernández, José L.
author_facet Gómez Fernández, José L.
Agudo, Iván
Marscher, Alan P.
Jorstad, Svetlana G.
Roca-Sogorb, Mar
author_role author
author2 Agudo, Iván
Marscher, Alan P.
Jorstad, Svetlana G.
Roca-Sogorb, Mar
author2_role author
author
author
author
dc.subject.none.fl_str_mv Galaxies: active
Galaxies: individual (3C 120)
Galaxies: jets
Polarization
Radio continuum: galaxies
topic Galaxies: active
Galaxies: individual (3C 120)
Galaxies: jets
Polarization
Radio continuum: galaxies
description 5 pages, 3 figures.
publishDate 2008
dc.date.none.fl_str_mv 2008
2010
2010
dc.type.none.fl_str_mv info:eu-repo/semantics/article
http://purl.org/coar/resource_type/c_6501
format article
dc.identifier.none.fl_str_mv http://hdl.handle.net/10261/20584
url http://hdl.handle.net/10261/20584
dc.language.none.fl_str_mv Inglés
language_invalid_str_mv Inglés
dc.relation.none.fl_str_mv http://sait.oat.ts.astro.it/MSAIt790408/index.html
dc.rights.none.fl_str_mv info:eu-repo/semantics/openAccess
eu_rights_str_mv openAccess
dc.format.none.fl_str_mv 566322 bytes
application/pdf
dc.publisher.none.fl_str_mv Società astronomica italiana
publisher.none.fl_str_mv Società astronomica italiana
dc.source.none.fl_str_mv reponame:DIGITAL.CSIC. Repositorio Institucional del CSIC
instname:Consejo Superior de Investigaciones Científicas (CSIC)
instname_str Consejo Superior de Investigaciones Científicas (CSIC)
reponame_str DIGITAL.CSIC. Repositorio Institucional del CSIC
collection DIGITAL.CSIC. Repositorio Institucional del CSIC
repository.name.fl_str_mv
repository.mail.fl_str_mv
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score 15,812429

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