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

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dc.contributor.author Kudryavtseva, N. A.
dc.contributor.author Gabuzda, Denise
dc.contributor.author Aller, M. F.
dc.contributor.author Aller, H. D.
dc.date.accessioned 2017-11-07T09:38:55Z
dc.date.available 2017-11-07T09:38:55Z
dc.date.issued 2011
dc.identifier.citation Kudryavtseva, N. A., Gabuzda, D. C., Aller, M. F. and 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), pp. 1631-1637. doi: 10.1111/j.1365-2966.2011.18808.x en
dc.identifier.volume 415
dc.identifier.issued 2
dc.identifier.startpage 1631
dc.identifier.endpage 1637
dc.identifier.issn 0035-8711
dc.identifier.uri http://hdl.handle.net/10468/4963
dc.identifier.doi 10.1111/j.1365-2966.2011.18808.x
dc.description.abstract We 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 similar or equal to 0.1 G and magnetic field at 1 pc similar or equal to 0.4 G. en
dc.description.sponsorship Rheinische Friedrich-Wilhelms-Universität Bonn/Universität zu Köln (International Max Planck Research School (IMPRS) for Radio and Infrared Astronomy)
dc.format.mimetype application/pdf en
dc.language.iso en en
dc.publisher Oxford University Press en
dc.relation.uri https://academic.oup.com/mnras/article-lookup/doi/10.1111/j.1365-2966.2011.18808.x
dc.rights © 2011, the Authors. Monthly Notices of the Royal Astronomical Society © 2011, RAS en
dc.subject Galaxies en
dc.subject Active en
dc.subject Individual en
dc.subject 3C 345 en
dc.subject Jets en
dc.subject Magnetic fields en
dc.title A new method for estimating frequency-dependent core shifts in active galactic nucleus jets en
dc.type Article (peer-reviewed) en
dc.internal.authorcontactother Denise Gabuzda, Physics, University College Cork, Cork, Ireland. +353-21-490-3000 Email: d.gabuzda@ucc.ie en
dc.internal.availability Full text available en
dc.description.version Published Version en
dc.contributor.funder University of Michigan
dc.contributor.funder National Aeronautics and Space Administration
dc.contributor.funder National Science Foundation
dc.contributor.funder Science Foundation Ireland
dc.contributor.funder Universität zu Köln
dc.contributor.funder Rheinische Friedrich-Wilhelms-Universität Bonn
dc.description.status Peer reviewed en
dc.identifier.journaltitle Monthly Notices of the Royal Astronomical Society en
dc.internal.IRISemailaddress d.gabuzda@ucc.ie en

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