A new method for estimating frequency-dependent core shifts in active galactic nucleus jets
dc.contributor.author | Kudryavtseva, N. A. | |
dc.contributor.author | Gabuzda, Denise | |
dc.contributor.author | Aller, M. F. | |
dc.contributor.author | Aller, H. D. | |
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.date.accessioned | 2017-11-07T09:38:55Z | |
dc.date.available | 2017-11-07T09:38:55Z | |
dc.date.issued | 2011 | |
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.description.status | Peer reviewed | en |
dc.description.version | Published Version | en |
dc.format.mimetype | application/pdf | en |
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.doi | 10.1111/j.1365-2966.2011.18808.x | |
dc.identifier.endpage | 1637 | |
dc.identifier.issn | 0035-8711 | |
dc.identifier.issued | 2 | |
dc.identifier.journaltitle | Monthly Notices of the Royal Astronomical Society | en |
dc.identifier.startpage | 1631 | |
dc.identifier.uri | https://hdl.handle.net/10468/4963 | |
dc.identifier.volume | 415 | |
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 |
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