Astronomy and Astrophysics – Astronomy
Scientific paper
Jan 1980
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1980apj...235...18k&link_type=abstract
Astrophysical Journal, Part 1, vol. 235, Jan. 1, 1980, p. 18-21.
Astronomy and Astrophysics
Astronomy
10
Galactic Nuclei, Millimeter Waves, Radio Astronomy, Radio Galaxies, Synchrotron Radiation
Scientific paper
Radio galaxies were observed for the first time at 150 GHz. The central sources in Cyg A and 3C 111 were detected, as were the two radio lobes of Cyg A. No emission was found from the central source in 3C 236. The millimeter-wavelength emission from the central sources in Cyg A and 3C 111 is probably due in each case to a compact component that is optically thin to synchrotron radiation above about 35 GHz. These components are similar, although the compact component in 3C 111 is more luminous at both radio and X-ray wavelengths than the one in Cyg A. The 3C 111 central source was much weaker than anticipated on the basis of prior observations at 90 GHz, perhaps due to variability. Even at 150 GHz, there is no evidence of a high-frequency cutoff in the spectrum of the central source in Cyg A, and variability of this source also is expected. The flux densities of the Cyg A lobes are consistent with the power laws derived at lower frequencies, indicating that no steepening occurs in their spectra out to at least 150 GHz. There is no evidence for a compact, optically thick component in 3C 236.
Brown Warren L.
Hobbs Richard W.
Kafatos Menas
Maran Stephen P.
No associations
LandOfFree
150 GHz observations of three radio galaxies does not yet have a rating. At this time, there are no reviews or comments for this scientific paper.
If you have personal experience with 150 GHz observations of three radio galaxies, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and 150 GHz observations of three radio galaxies will most certainly appreciate the feedback.
Profile ID: LFWR-SCP-O-880519