Observations of 10 tailed radio sources at 10.6 GHz

Details Observations of 10 tailed radio sources at 10.6 GHz Observations of 10 tailed radio sources at 10.6 GHz

Dec 1993

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1993a%26a...280...63m&link_type=abstract

Astronomy and Astrophysics (ISSN 0004-6361), vol. 280, no. 1, p. 63-75

Astronomy and Astrophysics

Astronomy

7

Continuous Spectra, Intergalactic Media, Interstellar Magnetic Fields, Polarization (Waves), Radio Astronomy, Radio Galaxies, Radio Jets (Astronomy), Radio Spectra, Centimeter Waves, Elliptical Galaxies, Spectral Energy Distribution, Superhigh Frequencies

Scientific paper

We have used the Effelsberg 100-m telescope to map ten tailed radio sources at 10.6 GHz (lambda 2.8 cm). We find extended emission at the outskirts of the tails, with degrees of linear polarization as high as the theoretically expected values in some cases. At the sources' heads we generally find low degrees of polarization, most likely as result of strong beam depolarization caused by the strong initial bending of the jets along with magnetic fields. The orientation of the magnetic field is mostly along the tails in their outer reaches, and in some cases transverse closer to the central sources. We have detected some pronounced asymmetries of the polarization between the two lateral halves of the tails, which is interpreted as an intrinsic difference in the degree of ordering of the magnetic field. The total radio spectra of the radio galaxies in this sample are found to show a high-frequency steepening, consistent with aging of radiating electrons.

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