Astronomy and Astrophysics – Astronomy
Scientific paper
Dec 1984
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1984apj...287l..65y&link_type=abstract
Astrophysical Journal, Part 2 - Letters to the Editor (ISSN 0004-637X), vol. 287, Dec. 15, 1984, p. L65-L68.
Astronomy and Astrophysics
Astronomy
90
Carbon Monoxide, Galaxies, Infrared Astronomy Satellite, Interstellar Gas, Molecular Clouds, Chemiluminescence, Far Infrared Radiation, Molecular Spectra, Radio Astronomy
Scientific paper
The results of a search for CO emission in 20 galaxies in the IRAS circulars are presented. The observations were carried out using the 14-m millimeter telescope of the Five College Radio Astronomy Observatory (FCRAO) at a half-power beam width of 45 arcsec. CO was detected in 10 of the galaxies, including Arp 220 and NGC 6240. A rough correlation was found between CO and 10-micron luminosities, although a wide scatter was observed in the relation. The very luminous far-IR galaxies Arp 220 and NGC 6240 contain 3 x 10 to the 10th solar mass of H2, or a factor of 3 more molecular gas than was found in the luminous spiral galaxies NGC and M51. It is shown that if the far-IR emission originated in a region much smaller than 45 arcsec, the surface density of the molecular hydrogen in Arp 220 may exceed that observed in any Sc galaxy.
Kenney Jeff
Lord Steve D.
Schloerb Peter F.
Young John S.
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