Astronomy and Astrophysics – Astronomy
Scientific paper
Jul 1981
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1981apj...247..443b&link_type=abstract
Astrophysical Journal, Part 1, vol. 247, July 15, 1981, p. 443-448.
Astronomy and Astrophysics
Astronomy
44
Carbon Monoxide, Galactic Radiation, Interstellar Gas, Microwave Emission, Molecular Clouds, Seyfert Galaxies, Elliptical Galaxies, Emission Spectra, Far Infrared Radiation, Galactic Nuclei, H Lines, Line Spectra, Milky Way Galaxy, Millimeter Waves, Radiant Flux Density, Radio Sources (Astronomy), Spectral Line Width
Scientific paper
Millimeter-wave CO emission from the Seyfert galaxies NGC 3227 and 4051 is detected at 0.012 K and 0.020 K, respectively. Low upper limits for four other galaxies are also reported. The CO linewidths are smaller than those of corresponding H I profiles, and estimates of the molecular mass suggest that the surface density of molecules in the disks is comparable to that found in the Milky Way. Scaling the CO detectors and upper limits by H I and 10 micron emission shows poor correlation between these quantities and CO emission. Expected values of flux densities of the 100 micron emission are also given, and an attempt is made to find CO emission from NGC 4278, NGC 3310, and M87. It is concluded that CO is associated with the galactic disk, and is not directly related to the nuclear activity in the Seyfert galaxies NGC 3227 and 4051.
Bieging John H.
Blitz Leo
Lada Charles J.
Stark Alexander
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