Astronomy and Astrophysics – Astronomy
Scientific paper
Jan 1976
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1976apj...203..307o&link_type=abstract
Astrophysical Journal, vol. 203, Jan. 15, 1976, pt. 1, p. 307-312.
Astronomy and Astrophysics
Astronomy
35
Astronomical Spectroscopy, Galactic Clusters, Interferometry, Radio Galaxies, Radio Spectra, Radiant Flux Density, Radio Sources (Astronomy), Spectrum Analysis, Tables (Data)
Scientific paper
Observations with the NRAO interferometer at 2695 and 8085 MHz are reported for 16 radio sources with total angular sizes less than 5 sec. These sources are a subset of a larger sample of 94 sources in the directions of rich clusters of galaxies which have been observed with the NRAO interferometer. Flux densities, angular structure down to 0.1 sec, accurate radio positions, and optical identifications are reported. Only one of these compact sources is possibly identified with a cluster galaxy; most of the extended sources in the sample are clearly associated with dominant cluster galaxies. This suggests that all or almost all radio galaxies in rich clusters have extended structure greater than 10 kpc. Compact sources with steep spectra in the sample seem likely to be very distant radio galaxies, while the nature of the sources with flat spectra is unclear, although they may also be background sources.
Owen Frazer N.
Rudnick Lawrence
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