High-resolution observations of millijansky radio sources - The run of median angular size at low flux densities

Details High-resolution observations of millijansky radio sources - The run of median angular size at low flux densities High-resolution observations of millijansky radio sources - The run of median angular size at low flux densities

Mar 1988

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1988a%26a...193....5o&link_type=abstract

Astronomy and Astrophysics (ISSN 0004-6361), vol. 193, no. 1-2, March 1988, p. 5-14.

Astronomy and Astrophysics

Astronomy

14

Astronomical Maps, Radiant Flux Density, Radio Sources (Astronomy), Astronomical Catalogs, Bandwidth, Centimeter Waves

Scientific paper

The author presents high resolution (1arcsec) maps of 31 radio sources with total flux densities between 0.3 and 10 mJy, made with the VLA at 20 cm in the A-configuration. Seven sources were mapped individually with snapshots. These sources were selected from the 21 cm WSRT Leiden Berkeley Deep Survey (Windhorst et al., 1984) source list. The other 24 sources were detected in five fields situated in the area of the, at present, deepest Westerbork 21 cm survey (Oort, 1987). 25 sources are used to determine the median angular size in the flux density range between 0.4 and 1.0 mJy. The median angular size of these sources is smaller than 1arcsec, since more than half of the sources remain unresolved with the VLA A-array at 20 cm. All the high resolution information available on WSRT 21 cm deep survey radio sources is combined to determine the run of the median angular size below 50 mJy. It is found that θmed(S) decreases steadily toward lower flux densities, to under 1arcsec below 1 mJy.

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