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A new method for estimating frequency‐dependent core shifts in active galactic nucleus jets

dc.contributor.authorKudryavtseva, N. A.en_US
dc.contributor.authorGabuzda, D. C.en_US
dc.contributor.authorAller, Margo F.en_US
dc.contributor.authorAller, Hugh D.en_US
dc.date.accessioned2011-11-10T15:39:04Z
dc.date.available2012-10-01T18:34:47Zen_US
dc.date.issued2011-08-01en_US
dc.identifier.citationKudryavtseva, N. A.; Gabuzda, D. C.; Aller, M. F.; Aller, H. D. (2011). "A new method for estimating frequency‐dependent core shifts in active galactic nucleus jets." Monthly Notices of the Royal Astronomical Society 415(2). <http://hdl.handle.net/2027.42/87134>en_US
dc.identifier.issn0035-8711en_US
dc.identifier.issn1365-2966en_US
dc.identifier.urihttps://hdl.handle.net/2027.42/87134
dc.description.abstractWe discuss the opacity in the core regions of active galactic nuclei observed with Very Long Baseline Interferometry (VLBI), and describe a new method for deriving the frequency‐dependent shifts of the VLBI core from the frequency‐dependent time lags of flares observed with single‐dish observations. Application of the method to the core shifts of the quasar 3C 345 shows a very good agreement between the core shifts directly measured from VLBI observations and derived from flares in the total flux density using the proposed method. The frequency‐dependent time lags of flares can be used to derive physical parameters of the jets, such as distance from the VLBI core to the base of the jet and the magnetic fields in the core region. Our estimates for 3C 345 indicate core magnetic fields ≃0.1 G and magnetic field at 1 pc ≃ 0.4 G.en_US
dc.publisherBlackwell Publishing Ltden_US
dc.publisherWiley Periodicals, Inc.en_US
dc.subject.otherGalaxies: Activeen_US
dc.subject.otherGalaxies: Individual: 3C 345en_US
dc.subject.otherGalaxies: Jetsen_US
dc.subject.otherGalaxies: Magnetic Fieldsen_US
dc.titleA new method for estimating frequency‐dependent core shifts in active galactic nucleus jetsen_US
dc.typeArticleen_US
dc.rights.robotsIndexNoFollowen_US
dc.subject.hlbsecondlevelAstronomyen_US
dc.subject.hlbtoplevelScienceen_US
dc.description.peerreviewedPeer Revieweden_US
dc.contributor.affiliationumAstronomy Department, University of Michigan, Ann Arbor, MI 48109‐1042, USAen_US
dc.contributor.affiliationotherCurtin Institute of Radio Astronomy, Curtin University, GPO Box U1987, Perth, WA 6845, Australiaen_US
dc.contributor.affiliationotherPhysics Department, University College Cork, Cork, Irelanden_US
dc.description.bitstreamurlhttp://deepblue.lib.umich.edu/bitstream/2027.42/87134/1/j.1365-2966.2011.18808.x.pdf
dc.identifier.doi10.1111/j.1365-2966.2011.18808.xen_US
dc.identifier.sourceMonthly Notices of the Royal Astronomical Societyen_US
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