Faint radio sources and gravitational lensing
- 1. MIT, Cambridge, MA (USA)
- 2. E. O. Hulburt Center for Space Research, Washington, DC (USA)
Description
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. 28 refs
Additional details
Publishing Information
- Journal Title
- Astrophysical Journal
- Journal Volume
- 353
- Series
- Astrophys. J.
- Journal Page Range
- 34-38
- ISSN
- 0004-637X
- CODEN
- ASJOA
INIS
- Country of Publication
- United States
- Country of Input or Organization
- United States
- INIS RN
- 21069448
- Subject category
- S79: ASTROPHYSICS, COSMOLOGY AND ASTRONOMY; S79: ASTROPHYSICS, COSMOLOGY AND ASTRONOMY;
- Descriptors DEI
- ALIGNMENT; BRIGHTNESS; COSMIC RADIO SOURCES; COSMOLOGICAL MODELS; DENSITY; EMISSION; GRAVITATIONAL LENSES; RADIOWAVE RADIATION
- Descriptors DEC
- ELECTROMAGNETIC RADIATION; LENSES; MATHEMATICAL MODELS; OPTICAL PROPERTIES; PHYSICAL PROPERTIES; RADIATIONS