MOJAVE IX. Core shift effects Virtual Observatory Resource

Authors
  1. Pushkarev A.B.
  2. Hovatta T.
  3. Kovalev Y.Y.
  4. Lister M.L.
  5. Lobanov A.P.,Savolainen T.
  6. Zensus J.A.
  7. Published by
    CDS
Abstract

We have investigated a frequency-dependent shift in the absolute position of the optically thick apparent origin of parsec-scale jets ("core shift" effect) to probe physical conditions in ultra-compact relativistic outflows in active galactic nuclei. We used multi-frequency Very Long Baseline Array (VLBA) observations of 191 sources carried out in 12 epochs in 2006 within the Monitoring Of Jets in Active galactic nuclei with VLBA Experiments (MOJAVE) program. The observations were performed at 8.1, 8.4, 12.1, and 15.4GHz. We implemented a method of determining the core shift vector based on (i) image registration by two-dimensional normalized cross-correlation and (ii) model-fitting the source brightness distribution to take into account a non-zero core component offset from the phase center.

Keywords
  1. Active galactic nuclei
  2. Quasars
  3. Magnetic fields
Bibliographic source Bibcode
2012A&A...545A.113P
See also HTML
https://cdsarc.cds.unistra.fr/viz-bin/cat/J/A+A/545/A113
IVOA Identifier IVOID
ivo://CDS.VizieR/J/A+A/545/A113
Document Object Identifer DOI
doi:10.26093/cds/vizier.35450113

Access

Web browser access HTML
http://vizier.cds.unistra.fr/viz-bin/VizieR-2?-source=J/A+A/545/A113
https://vizier.iucaa.in/viz-bin/VizieR-2?-source=J/A+A/545/A113
http://vizieridia.saao.ac.za/viz-bin/VizieR-2?-source=J/A+A/545/A113
IVOA Table Access TAP
http://tapvizier.cds.unistra.fr/TAPVizieR/tap
Run SQL-like queries with TAP-enabled clients (e.g., TOPCAT).
IVOA Cone Search SCS
For use with a cone search client (e.g., TOPCAT).
http://vizier.cds.unistra.fr/viz-bin/conesearch/J/A+A/545/A113/table1?
https://vizier.iucaa.in/viz-bin/conesearch/J/A+A/545/A113/table1?
http://vizieridia.saao.ac.za/viz-bin/conesearch/J/A+A/545/A113/table1?

History

2012-12-28T12:07:08Z
Resource record created
2012-12-28T12:07:08Z
Created
2017-10-18T08:23:52Z
Updated

Contact

Name
CDS support team
Postal Address
CDS, Observatoire de Strasbourg, 11 rue de l'Universite, F-67000 Strasbourg, France
E-Mail
cds-question@unistra.fr