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The inner jet of an active galactic nucleus as revealed by a radio-to-gamma-ray outburst

dc.contributor.authorMarscher, Alan P.en_US
dc.contributor.authorJorstad, Svetlana G.en_US
dc.contributor.authorD'Arcangelo, Francesca D.en_US
dc.contributor.authorSmith, Paul S.en_US
dc.contributor.authorWilliams, G. Granten_US
dc.contributor.authorLarionov, Valeri M.en_US
dc.contributor.authorOh, Harukien_US
dc.contributor.authorOlmstead, Alice R.en_US
dc.contributor.authorAller, Margo F.en_US
dc.contributor.authorAller, Hugh D.en_US
dc.contributor.authorMcHardy, Ian M.en_US
dc.contributor.authorLahteenmaki, Anneen_US
dc.contributor.authorTornikoski, Merjaen_US
dc.contributor.authorValtaoja, Eskoen_US
dc.contributor.authorHagen-Thorn, Vladimir A.en_US
dc.contributor.authorKopatskaya, Eugenia N.en_US
dc.contributor.authorGear, Walter K.en_US
dc.contributor.authorTosti, Ginoen_US
dc.contributor.authorKurtanidze, Omaren_US
dc.contributor.authorNikolashvili, Mariaen_US
dc.contributor.authorSigua, Loranden_US
dc.contributor.authorMiller, H. Richarden_US
dc.contributor.authorRyle, Wesley T.en_US
dc.date.accessioned2009-06-01T17:35:16Z
dc.date.available2009-06-01T17:35:16Z
dc.date.issued2008-04-24en_US
dc.identifier.citationMarscher, Alan P.; Jorstad, Svetlana G.; D'Arcangelo, Francesca D.; Smith, Paul S.; Williams, G. Grant; Larionov, Valeri M.; Oh, Haruki; Olmstead, Alice R.; Aller, Margo F.; Aller, Hugh D.; McHardy, Ian M.; Lahteenmaki, Anne; Tornikoski, Merja; Valtaoja, Esko; Hagen-Thorn, Vladimir A.; Kopatskaya, Eugenia N.; Gear, Walter K.; Tosti, Gino; Kurtanidze, Omar; Nikolashvili, Maria; Sigua, Lorand; Miller, H. Richard; Ryle, Wesley T.. (2008) "The inner jet of an active galactic nucleus as revealed by a radio-to-gamma-ray outburst." Nature 452(7190): 966-969. <http://hdl.handle.net/2027.42/62749>en_US
dc.identifier.issn0028-0836en_US
dc.identifier.urihttps://hdl.handle.net/2027.42/62749
dc.identifier.urihttp://www.ncbi.nlm.nih.gov/sites/entrez?cmd=retrieve&db=pubmed&list_uids=18432239&dopt=citationen_US
dc.description.abstractBlazars are the most extreme active galactic nuclei. They possess oppositely directed plasma jets emanating at near light speeds from accreting supermassive black holes. According to theoretical models, such jets are propelled by magnetic fields twisted by differential rotation of the black hole's accretion disk or inertial-frame-dragging ergosphere(1-3). The flow velocity increases outward along the jet in an acceleration and collimation zone containing a coiled magnetic field(4,5). Detailed observations of outbursts of electromagnetic radiation, for which blazars are famous, can potentially probe the zone. It has hitherto not been possible to either specify the location of the outbursts or verify the general picture of jet formation. Here we report sequences of high- resolution radio images and optical polarization measurements of the blazar BL Lacertae. The data reveal a bright feature in the jet that causes a double flare of radiation from optical frequencies to TeV gamma-ray energies, as well as a delayed outburst at radio wavelengths. We conclude that the event starts in a region with a helical magnetic field that we identify with the acceleration and collimation zone predicted by the theories. The feature brightens again when it crosses a standing shock wave corresponding to the bright 'core' seen on the images.en_US
dc.format.extent776614 bytes
dc.format.extent2489 bytes
dc.format.mimetypeapplication/pdf
dc.format.mimetypetext/plain
dc.publisherNature Publishing Groupen_US
dc.sourceNatureen_US
dc.titleThe inner jet of an active galactic nucleus as revealed by a radio-to-gamma-ray outbursten_US
dc.typeArticleen_US
dc.subject.hlbtoplevelScienceen_US
dc.description.peerreviewedPeer Revieweden_US
dc.contributor.affiliationumAller, Hugh D.] Univ Michigan, Dept Astron, Ann Arbor, MI 48109 USAen_US
dc.contributor.affiliationother[Marscher, Alan P.en_US
dc.contributor.affiliationotherJorstad, Svetlana G.en_US
dc.contributor.affiliationotherD'Arcangelo, Francesca D.en_US
dc.contributor.affiliationotherOh, Harukien_US
dc.contributor.affiliationotherOlmstead, Alice R.] Boston Univ, Inst Astrophys Res, Boston, MA 02215 USAen_US
dc.contributor.affiliationother[Jorstad, Svetlana G.en_US
dc.contributor.affiliationotherLarionov, Valeri M.en_US
dc.contributor.affiliationotherHagen-Thorn, Vladimir A.en_US
dc.contributor.affiliationotherKopatskaya, Eugenia N.] St Petersburg State Univ, Astron Inst, St Petersburg 198504, Russiaen_US
dc.contributor.affiliationother[Smith, Paul S.] Univ Arizona, Steward Observ, Tucson, AZ 85721 USAen_US
dc.contributor.affiliationother[Williams, G. Grant] Univ Arizona, Multiple Mirror Telescope Observ, Tucson, AZ 85721 USAen_US
dc.contributor.affiliationother[Aller, Margo F.en_US
dc.contributor.affiliationother[McHardy, Ian M.] Univ Southampton, Dept Phys & Astron, Southampton SO17 1BJ, Hants, Englanden_US
dc.contributor.affiliationother[Lahteenmaki, Anneen_US
dc.contributor.affiliationotherTornikoski, Merja] Helsinki Univ Technol, TKK, Metsahovi Radio Observ, Kylmala 02540, Finlanden_US
dc.contributor.affiliationother[Valtaoja, Esko] Tuorla Observ, Piikkio 21500, Finlanden_US
dc.contributor.affiliationother[Valtaoja, Esko] Univ Turku, Dept Phys, Turku 20014, Finlanden_US
dc.contributor.affiliationother[Gear, Walter K.] Cardiff Univ, Sch Phys & Astron, Cardiff CF24 3YB, Walesen_US
dc.contributor.affiliationother[Tosti, Gino] Univ Perugia, Dept Phys, I-06123 Perugia, Italyen_US
dc.contributor.affiliationother[Kurtanidze, Omaren_US
dc.contributor.affiliationotherNikolashvili, Mariaen_US
dc.contributor.affiliationotherSigua, Lorand] Abastumani Astrophys Observ, Mt Kanobili, Abastumani, Rep of Georgiaen_US
dc.contributor.affiliationother[Miller, H. Richarden_US
dc.contributor.affiliationotherRyle, Wesley T.] Georgia State Univ, Dept Phys & Astron, Atlanta, GA 30303 USAen_US
dc.identifier.pmid18432239en_US
dc.description.bitstreamurlhttp://deepblue.lib.umich.edu/bitstream/2027.42/62749/1/nature06895.pdf
dc.identifier.doihttp://dx.doi.org/10.1038/nature06895en_US
dc.identifier.sourceNatureen_US
dc.contributor.authoremailmarscher@bu.eduen_US
dc.owningcollnameInterdisciplinary and Peer-Reviewed


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