Faint radio sources and gravitational lensing

Details Faint radio sources and gravitational lensing Faint radio sources and gravitational lensing

Apr 1990

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1990apj...353...34l&link_type=abstract

Astrophysical Journal, Part 1 (ISSN 0004-637X), vol. 353, April 10, 1990, p. 34-38. Research supported by NSF and National Resea

Astronomy and Astrophysics

Astronomy

12

Faint Objects, Gravitational Lenses, Radio Sources (Astronomy), Density Distribution, Radio Emission, Very Large Array (Vla)

Scientific paper

Measurements of the surface density of radio sources resulting from a deep VLA integration at 5 GHz and the MIT-Green Bank (MG) II 5 GHz survey are summarized. The faint source counts are combined with previous observations and fitted to a power-law function of surface density vs. limiting flux density. The surface density of radio sources brighter than 1 mJy is k = 0.019 + or - 0.004/arcmin. The power-law exponent is best fit by -0.93 + or - 0.14. Between 15 and 100 mJy, the surface density of radio sources varies nearly as predicted by Euclidian models of the universe. Estimates are given for the number of chance alignments of radio sources in the VLA snapshot observations of the MIT-Princeton-Caltech gravitational lens search. The probability of lens candidate configurations occurring by chance alignment is calculated.

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