VLA observations of the inner lobes of Centaurus A

Details VLA observations of the inner lobes of Centaurus A VLA observations of the inner lobes of Centaurus A

Aug 1992

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1992apj...395..444c&link_type=abstract

Astrophysical Journal, Part 1 (ISSN 0004-637X), vol. 395, no. 2, Aug. 20, 1992, p. 444-452.

Astronomy and Astrophysics

Astronomy

56

Active Galactic Nuclei, Intergalactic Media, Interstellar Matter, Radio Galaxies, Very Large Array (Vla), Depolarization, Galactic Structure, Radio Astronomy, Radio Sources (Astronomy)

Scientific paper

VLA observations of Centaurus A have been used to derive the spectral and polarimetric properties of its inner radio lobes. The extended emission of the lobes is filamentary and two compact radio features are detected in the southern lobe which are roughly aligned with the main jet axis. This may indicate a counterjet in Centaurus A. New high-resolution 2 cm data show that parts of the inner jet may be overpressured relative to a plausible ISM by as much as a factor of 30. The rotation measure and the depolarization of the inner lobe are highly correlated. The RM data for most of the northern lobe and the southeastern half of the southern lobe are consistent with no significant depolarization between 6 and 18 cm, while the RM in the central region indicates high depolarization and a fractional polarization at 18 cm which is less than half that at 6 cm.

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