A multi-frequency polarization study of 3 C 66 B

Details A multi-frequency polarization study of 3 C 66 B A multi-frequency polarization study of 3 C 66 B

Feb 1986

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1986a%26a...156..234l&link_type=abstract

Astronomy and Astrophysics (ISSN 0004-6361), vol. 156, no. 1-2, Feb. 1986, p. 234-251.

Astronomy and Astrophysics

Astronomy

38

Galactic Rotation, Polarimetry, Radio Galaxies, Radio Jets (Astronomy), Astronomical Maps, Depolarization, Faraday Effect, Interstellar Magnetic Fields, Radio Spectra

Scientific paper

The nearby twin-jet radio source 3C 66B has been studied in total intensity and polarization at 5 frequencies and at resolutions ranging from 30arcsec to 0arcsec.35. The authors derive the distribution of spectral index, projected magnetic field and Faraday rotation across the source. For the first time a correlation is detected between depolarization and rotation measure, implying that some of the rotation must be occurring within the radio-emitting components. There is also good evidence for rotation in a foreground screen localised near the centre of the host galaxy. The minimum densities derived for the extended components are similar to those in the X-ray halo surrounding the radio source, strongly suggesting that matter enters the radio lobes via entrainment from the confining medium. The brighter jet gives text-book examples of the characteristic features known in such low-luminosity sources. Large-scale magnetic-field rings occur where the jets flare into brighter lobes, reinforcing the idea of an abrupt change in the jet flow.

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