Origin of the structures and polarization in the classical double 3C 219

Details Origin of the structures and polarization in the classical double 3C 219 Origin of the structures and polarization in the classical double 3C 219

Jan 1992

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1992apj...385..173c&link_type=abstract

Astrophysical Journal, Part 1 (ISSN 0004-637X), vol. 385, Jan. 20, 1992, p. 173-187.

Astronomy and Astrophysics

Astronomy

63

Galactic Structure, Polarization Characteristics, Radio Galaxies, Radio Jets (Astronomy), Continuous Radiation, Data Reduction, Interstellar Magnetic Fields, Very Large Array (Vla)

Scientific paper

High dynamic range VLA images of the radio source 3C 219 are derived at four frequencies with 1.4-arcsec resolution in order to determine the polarimetric properties of the source. The extended emission of the lobes is filamentary, as in other well-resolved radio galaxies. A second type of filamentation, spatially independent of the total intensity filaments, is found in the depolarization distribution of the source. The depolarization filaments are associated with strong local gradients in the rotation measure and may indicate that a clumpy magnetoionic medium surrounds the radio galaxy. Two interpretations of the abbreviated nature of the jets of 3C 219 are considered. The 'born-again relativistic jet' model assumes an episodic behavior in the relativistic outflow from the radio core. The 'passive magnetic field' model relates the observed asymmetries between the two jets to different orientations of the passive magnetic field that they transport. The strengths and weaknesses of each model as applied to 3C 219 are discussed.

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