VLA observations of the radio galaxy Hydra A (3C 218)

Details VLA observations of the radio galaxy Hydra A (3C 218) VLA observations of the radio galaxy Hydra A (3C 218)

Sep 1990

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1990apj...360...41t&link_type=abstract

Astrophysical Journal, Part 1 (ISSN 0004-637X), vol. 360, Sept. 1, 1990, p. 41-54.

Astronomy and Astrophysics

Astronomy

89

Radio Galaxies, Radio Jets (Astronomy), Very Large Array (Vla), Astronomical Maps, Galactic Rotation, Magnetic Field Configurations, Radio Astronomy

Scientific paper

An extensive series of observations of the radio galaxy Hydra A using the VLA is reported. The radio emission consists of two components: (1) a pair of well-collimated, curved jets with S-symmetry, each of which makes a turn through about 40 deg between the core and the lobe, and (2) diffuse radio lobes, also rotation-symmetric, although straighter, which extend north out to 5 arcmin (420 kpc) and south out to 3 arcmin (250 kpc). Rotation measures (RMs) ranging from -1000 to +3300 rad/sq m are found in the northern lobe with gradients in the RM of up to 1000 rad/sq m/arcsec. In the southern lobe the RM gradients are probably in excess of + or - 3750 rad/sq m, the maximum value that can be unambiguously determined here.

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