Co emission from Seyfert galaxies

Journal Article · Wed Jul 15 04:00:00 EDT 1981 · Astrophys. J.; (United States)

DOI:https://doi.org/10.1086/159052· OSTI ID:5959281

Bieging, J H; Blitz, L; Lada, C J; Stark, A A

We report the detction of millimeter-wave CO emission from two Seyfert galaxies, NGC 3227 and NGC 4051, at levels of 0.012 K and 0.020 K., respectively. The widths of the CO lines were found to be smaller than those of corresponding Hi profiles. Estimates of the molecular mass suggest that the surface density of molecules in the disks of these two galaxies is comparable to that found in the molecular ring of the Milky Way. Sensitive upper limits for CO emission toward four other Seyfert galaxies (NGC 1275, NGC 4151, NGC 4439, and NGC 6764) are also reported. Scaling the CO detections and upper limits by Hi and 10 ..mu..m emission shows that neither of these quantities correlates well with the CO emission. We give values expected for the flux densities of the 100 ..mu..m emission from the observed Seyfert galaxies, assuming that the far-infrared emission scales with CO emission as for Galactic molecular clouds.

• Research Organization: Radio Astronomy Laboratory, University of California, Berkeley
• OSTI ID: 5959281
• Journal Information: Astrophys. J.; (United States), Journal Name: Astrophys. J.; (United States) Vol. 247:2; ISSN ASJOA
• Country of Publication: United States
• Language: English

Related Subjects

640105* -- Astrophysics & Cosmology-- Galaxies
71 CLASSICAL AND QUANTUM MECHANICS
GENERAL PHYSICS
CARBON COMPOUNDS
CARBON MONOXIDE
CARBON OXIDES
CHALCOGENIDES
COSMIC RADIO SOURCES
ELEMENTS
EMISSION
GALAXIES
H1 REGIONS
HYDROGEN
INFRARED SPECTRA
INTERSTELLAR SPACE
LINE WIDTHS
NONMETALS
OXIDES
OXYGEN COMPOUNDS
SEYFERT GALAXIES
SPACE
SPECTRA