Astronomy and Astrophysics – Astrophysics
Scientific paper
Feb 1986
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1986a%26a...156..386v&link_type=abstract
Astronomy and Astrophysics (ISSN 0004-6361), vol. 156, no. 1-2, Feb. 1986, p. 386-390.
Astronomy and Astrophysics
Astrophysics
40
Extragalactic Radio Sources, Faraday Effect, Galactic Clusters, Intergalactic Media, Interstellar Magnetic Fields, Linear Polarization, Galactic Rotation, Magnetic Field Configurations
Scientific paper
The authors report the discovery of a large-scale magnetic feature in the cluster of galaxies Abell 2319, which has been observed from a programme to determine accurate Faraday rotation measures (RM) from a large sample of extragalactic radio sources. In the case of A 2319, the radio sources chosen are located far behind the galaxy cluster, with their lines of sight through or adjacent to the galaxy cluster. An average excess Faraday RM ≈ 120 rad m-2 is observed for these radio sources behind the galaxy cluster but shining through the cluster, as opposed to the sources adjacent to the galaxy cluster. The authors propose an optical identification for the composite radio source system 13W 315 - 13W 318. A faint optical object is seen at the location of a newly discovered weak radio source at ≈19h21m30s.7+43°43arcmin08arcsec, peaking near the center of an elongated radio source system.
Broten N. W.
MacLeod John M.
Vallee Jacques P.
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