Asymmetric depolarization in double low-luminosity radio galaxies.

Details Asymmetric depolarization in double low-luminosity radio galaxies. Asymmetric depolarization in double low-luminosity radio galaxies.

Oct 1997

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1997a%26a...326..919m&link_type=abstract

Astronomy and Astrophysics, v.326, p.919-923

Astronomy and Astrophysics

Astrophysics

23

Radio Continuum: Galaxies, Galaxies: Active, Polarization, Galaxies: Jets

Scientific paper

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.

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