NASA/IPAC EXTRAGALACTIC DATABASE
Date and Time of the Query: 2019-06-15 T19:53:16 PDT
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For refcode 1997A&A...326..919M:
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Copyright by European Southern Observatory (ESO). Reproduced by permission
1997A&A...326..919M Asymmetric depolarization in double low-luminosity radio galaxies. Morganti R., Parma P., Capetti A., Fanti R., de Ruiter H.R. Received 2 January 1997/Accepted 13 May 1997 Abstract. To investigate the presence of the Laing-Garrington effect (i.e. the lobe containing the jet more depolarized than that containing the counter-jet), we analyse polarization data at 6 and 20cm for a sample of double low-luminosity radio galaxies. The effect is well visible, although not very strong. We therefore confirm what was inferred in a previous paper based on data at one frequency (20cm) only. Furthermore, we find that radio galaxies with strong radio cores show a more pronounced asymmetry in depolarization. We conclude that the presence of the Laing-Garrington effect in our sample is a indication that relativistic motions do occur on the kpc scale of low-luminosity radio galaxies as recently suggested by theoretical arguments and observational evidence. Key words: radio continuum: galaxies - galaxies: active - polarization - galaxies: jets
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