VLA observations of the extended radio core in 3C 236

Details VLA observations of the extended radio core in 3C 236 VLA observations of the extended radio core in 3C 236

Jun 1979

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1979a%26a....76..106f&link_type=abstract

Astronomy and Astrophysics, vol. 76, no. 1, June 1979, p. 106-108.

Astronomy and Astrophysics

Astrophysics

13

Antenna Arrays, Astronomical Maps, Galactic Nuclei, Radio Galaxies, Collimation, Cores, Energy Transfer, Radiative Transfer

Scientific paper

Observations of the extended radio core in the giant radio galaxy 3C 236 were made at the VLA at 4.9, 14.8, and 22.5 GHz with a 10.6-km four-element array. It is found that the spectral-index distribution across the 2-kpc radio core is remarkably uniform and follows a power law. A flat-spectrum compact radio core was not detected at the 100 mJy level; hence the precise location of the nuclear region in the extended core is not known. The absence of a cutoff in the spectrum of the 2-kpc core at frequencies below 22.5 GHz implies that the electron age of less than 10 million yr is much less than the light travel time across the extended emission associated with 3C 236. This 2-kpc emission may be associated with the energy transport from the galactic nucleus to the outer lobes.

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