Faraday rotation in Magellanic Bridge Virtual Observatory Resource

Authors
  1. Kaczmarek J.F.
  2. Purcell C.R.
  3. Gaensler B.M.
  4. McClure-Griffiths N.M.,Stevens J.
  5. Published by
    CDS
Abstract

We present an investigation into the magnetism of the Magellanic Bridge, carried out through the observation of Faraday rotation towards 167 polarized extragalactic radio sources spanning the continuous frequency range of 1.3-3.1GHz with the Australia Telescope Compact Array. Comparing measured Faraday depth values of sources 'on' and 'off' the Bridge, we find that the two populations are implicitly different. Assuming that this difference in populations is due to a coherent field in the Magellanic Bridge, the observed Faraday depths indicate a median line-of-sight coherent magnetic-field strength of B||~=0.3uG directed uniformly away from us. Motivated by the varying magnitude of Faraday depths of sources on the Bridge, we speculate that the coherent field observed in the Bridge is a consequence of the coherent magnetic fields from the Large and Small Magellanic Clouds being pulled into the tidal feature. This is the first observation of a coherent magnetic field spanning the entirety of the Magellanic Bridge and we argue that this is a direct probe of a 'pan-Magellanic' field.

Keywords
  1. Magellanic Clouds
  2. Magnetic fields
  3. Polarimetry
Bibliographic source Bibcode
2017MNRAS.467.1776K
See also HTML
https://cdsarc.cds.unistra.fr/viz-bin/cat/J/MNRAS/467/1776
IVOA Identifier IVOID
ivo://CDS.VizieR/J/MNRAS/467/1776

Access

Web browser access HTML
http://vizier.cds.unistra.fr/viz-bin/VizieR-2?-source=J/MNRAS/467/1776
https://vizier.iucaa.in/viz-bin/VizieR-2?-source=J/MNRAS/467/1776
http://vizieridia.saao.ac.za/viz-bin/VizieR-2?-source=J/MNRAS/467/1776
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/MNRAS/467/1776/tableb1?
https://vizier.iucaa.in/viz-bin/conesearch/J/MNRAS/467/1776/tableb1?
http://vizieridia.saao.ac.za/viz-bin/conesearch/J/MNRAS/467/1776/tableb1?

History

2019-12-06T16:17:40Z
Resource record created
2019-12-06T16:17:40Z
Created
2020-04-08T10:59:49Z
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