IAU01905
Presentation type requested: POSTER
A DEEP VLA IMAGE COVERING 5 SQUARE DEGREES
J. J Condon
National Radio Astronomy Observatory
An image covering 5 square deg of extragalactic sky at 1.4 GHz with 5.0 arcsec resolution and nearly uniform 23 microJy/beam rms noise was constructed from 35 partially overlapping images made with the VLA B configuration. It contains 3565 radio components brighter than 115 microJy/beam, most of which are marginally resolved faint (S < 1 mJy) radio sources in luminous starburst galaxies at moderate (z ~ 0.5) redshifts. This source population should obey the far-infrared/radio correlation and be nearly identical to the one that will be detected at far-infared wavelengths by the SIRTF First-Look Survey. There are also numerous extended radio sources having the core-jet-lobe morphologies characteristic sources powered by supermassive black holes in active galactic nuclei (AGN). The cosmological evolution of radio sources powered by AGN is so strong that faint radio sources are not more distant than bright ones, only less luminous. Consequently, most of the extended sources have weak FR I jets that are more easily bent and disrupted than the powerful FR 2 jets of classical radio galaxies.
Cotton W. D, Yin Q. F
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