Astronomy and Astrophysics – Astronomy
Scientific paper
May 1991
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1991a%26a...245..371b&link_type=abstract
Astronomy and Astrophysics (ISSN 0004-6361), vol. 245, no. 2, May 1991, p. 371-392.
Astronomy and Astrophysics
Astronomy
23
Radio Galaxies, Radio Jets (Astronomy), Very Large Array (Vla), Microwave Emission, Polarization Characteristics
Scientific paper
The present study continues a program of imaging extended bright radio galaxies identified with radio sources from the B2 catalog. Images of the radio galaxy B2 0326 + 39 in total and polarized emission at 0.6, 1.4 and 5.0 Ghz, obtained with the Westerbork Synthesis Radio Telescope and the VLA are presented. The radio source contains an unresolved opaque radio core that is linked by two jets to broad lobes with faint S-symmetric elongations. It is suggested that there is a Faraday rotation measure gradient across the source, perhaps as large as 40-60 rad/sq m. Various ways to estimate the Mach number and velocity of the jets are considered. The jets are found to be initially light, confined, and mildly supersonic, but they are decelerated and become denser as they propagate away from the core. It is considered unlikely that the lobes have come to radiative equilibrium with the energy flux provided by the jets.
Baum Stefi A.
Bridle Alan H.
Ekers Ron D.
Fanti Roberto
Fomalont Edward B.
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