Astronomy and Astrophysics – Astronomy
Scientific paper
Dec 1980
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1980natur.288..459u&link_type=abstract
Nature, vol. 288, Dec. 4, 1980, p. 459-461.
Astronomy and Astrophysics
Astronomy
4
Astronomical Maps, Galactic Structure, Optical Properties, Radio Galaxies, Radio Spectra, Radiant Flux Density, Radio Astronomy, Red Shift
Scientific paper
Observations of the giant radio galaxy B2 1141+37, which has a widely separated two-component radio structure and is optically identified with a tight chain of galaxies, are reported. The source was observed at 4900 MHz with the VLA at an effective integration time of 17 min. The map obtained shows two radio lobes with maxima coinciding with those in a previous 1415 MHz map and intensities about 1.5 times smaller than those obtained by extrapolating the spectrum defined by the flux density at 408 and 1415 MHz. Measurements of the redshifts of the two brightest galaxies identified with the radio source with an image intensified dissector scanner result in values of 0.1145 and 0.1155, which imply, with a Hubble constant of 50 km/sec per Mpc, a distance of 687 Mpc to the radio source and a separation of 1.0 Mpc between the lobes making it one of the largest radio sources known.
Butcher Harvey
Meier David L.
Ulrich Marie-Helene
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