VLA high resolution observations of weak Leiden-Berkeley Deep-Survey (LBDS) sources

Astronomy and Astrophysics – Astrophysics

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Galactic Structure, Radio Galaxies, Very Large Array (Vla), Galactic Evolution, Radiant Flux Density, Red Shift

Scientific paper

The majority of the 1-arcsec resolution snapshot maps of 133 radio sources presented from the Leiden-Berkeley Deep Survey (LBDS) indicate that the sources have flux densities in the 1-100 mJy range at 1.4 GHz, with a median flux density of 5 mJy. A combination of all radio-morphological data available for the LBDS, the median angular size of a complete radio sample is found to decrease with decreasing flux density to a value as low as about 2 arcsec between 1 and 10 mJy. Definite indications are found for a decrease of intrinsic size with increasing redshift, with a relation that results in a size decrease of factor 4 with respect to the local value at the same radio power.

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