Astronomy and Astrophysics – Astrophysics
Scientific paper
Dec 1989
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1989a%26a...226l...5m&link_type=abstract
Astronomy and Astrophysics (ISSN 0004-6361), vol. 226, no. 1, Dec. 1989, p. L5-L8.
Astronomy and Astrophysics
Astrophysics
42
Abundance, Galactic Nuclei, Galactic Radiation, Millimeter Waves, Molecular Gases, Spiral Galaxies, Carbon Compounds, Emission Spectra, Gas Density, Line Spectra, Sulfides
Scientific paper
Results are presented of a search for CS emissions toward 12 galaxies which are known to be strong CO emitters. Detections of the CS J = 2-1 and 3-2 transitions were obtained for Maffei 2, NGC4945, M83, and NGC6946; there were also marginal detections toward the Seyfert galaxy NGC1068 and toward NGC3079. For the sources with detected 3-2 emission, the CS(3-2)/CO(1-0) intensity ratio lies in the range between 1:15 and 1:68. It was found that there might be a direct relationship between the IR luminosity of a galaxy and the CS/CO intensity ratio, indicating that the fraction of high-density gas becomes larger in nuclei with a high rate of star formation.
Harju Jorma
Henkel Carsten
Mauersberger Rainer
Wilson Thomas L.
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