SEST observations of CO(1-0) emission in ultraluminous infrared galaxies

Details SEST observations of CO(1-0) emission in ultraluminous infrared galaxies SEST observations of CO(1-0) emission in ultraluminous infrared galaxies

Nov 1988

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1988a%26a...206l..20m&link_type=abstract

Astronomy and Astrophysics (ISSN 0004-6361), vol. 206, no. 1, Nov. 1988, p. L20-L22. Research supported by NSF.

Astronomy and Astrophysics

Astronomy

10

Carbon Monoxide, Galactic Radiation, Infrared Sources (Astronomy), Submillimeter Waves, Active Galaxies, Interacting Galaxies, Molecular Clouds, Spiral Galaxies

Scientific paper

The authors report the first observations made with the Swedish-European Submillimeter Telescope (SEST) of CO(1 - 0) emission from distant ultraluminous infrared galaxies. They detected four of the most luminous (LIR ≥ 1012L_sun;) IRAS galaxies in the local Universe (z ≤ 0.1) that are south of declination -40°. The total masses of molecular gas in these galaxies are in the range of 1 - 6×1010M_sun;, and the infrared luminosities per unit mass of molecular gas, LIR/M(H2), are in the range 20 - 80 L_sun;/M_sun;, which is higher than in isolated spirals and classic starburst galaxies. The optical morphology and large masses of molecular gas suggest that ultraluminous infrared galaxies are mergers of giant spiral galaxies.

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