CO emission from IRAS galaxies

Journal Article · Sat Dec 15 04:00:00 EST 1984 · Astrophys. J., Lett. Ed.; (United States)

DOI:https://doi.org/10.1086/184399· OSTI ID:6132054

Young, J S; Kenney, J; Lord, S D; Schloerb, F P

We have searched for CO emission in 20 galaxies listed in the IRAS circulars using the 14 m millimeter telescope of the FCRAO (HPBW = 45''). CO was detected in 10 of these galaxies, including Arp 220 and NGC 6240. We find a rough correlation between CO and 100 ..mu..m luminosities, although a wide scatter is observed in this relation. The very luminous far-infrared galaxies Arp 220 and NGC 6240 contain 3 x 10/sup 10/ M/sub sun/ of H/sub 2/, or a factor of 3 more molecular gas than is found in luminous spirals such as NGC 6946 and M51. However, if the far-IR emission originates in a region much smaller than 45'', the surface density of molecular hydrogen in Arp 220 may exceed that observed in any Sc galaxy.

• Research Organization: Department of Physics and Astronomy, University of Massachusetts; and Five College Radio Astronomy Observatory
• OSTI ID: 6132054
• Journal Information: Astrophys. J., Lett. Ed.; (United States), Journal Name: Astrophys. J., Lett. Ed.; (United States) Vol. 287:2; ISSN AJLEA
• 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
ELECTROMAGNETIC RADIATION
EMISSION
FAR INFRARED RADIATION
GALAXIES
INFRARED RADIATION
INFRARED SPECTRA
INTERSTELLAR GRAINS
LUMINOSITY
OPTICAL PROPERTIES
OXIDES
OXYGEN COMPOUNDS
PARTICLES
PHYSICAL PROPERTIES
RADIATIONS
SPECTRA