Astronomy and Astrophysics – Astronomy
Scientific paper
Sep 1990
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1990a%26a...236..327m&link_type=abstract
Astronomy and Astrophysics (ISSN 0004-6361), vol. 236, no. 2, Sept. 1990, p. 327-332. Research supported by NSF.
Astronomy and Astrophysics
Astronomy
54
Carbon Monoxide, Emission Spectra, Infrared Sources (Astronomy), Luminosity, Spiral Galaxies, Infrared Astronomy Satellite, Infrared Radiation, Molecular Clouds, Molecular Gases, Southern Sky
Scientific paper
CO (1-0) emission was detected from 28 high luminosity IRAS galaxies in the southern sky, selected from a sample of galaxies with 60 micron IRAS fluxes over 4.5 Jy and IR luminosities over 10 to the 11th solar. These galaxies have total masses of H2 in the range of 0.6-6 x 10 to the 10th solar mass, namely 2-20 times the mass of molecular gas in the Galaxy. The IR luminosities per nucleon of molecular gas, L(IR)/M (H2), are in the range of 10-80 L(solar)/M(solar). This is 5-40 times the global value of this ratio in the Galaxy averaged over the whole disk. The optical morphology and the large masses of molecular gas found among the 12 galaxies of this sample with L(IR) over 10 to the 12th L(solar) suggest that ultraluminous IR galaxies are mergers of giant spiral galaxies.
Booth Roy S.
Garay Guido
Johansson Lars E. B.
Mirabel Felix I.
Sanders David B.
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