Astronomy and Astrophysics – Astrophysics
Scientific paper
Sep 1982
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1982apj...260l..11y&link_type=abstract
Astrophysical Journal, Part 2 - Letters to the Editor, vol. 260, Sept. 1, 1982, p. L11-L17.
Astronomy and Astrophysics
Astrophysics
95
Carbon Monoxide, Interstellar Gas, Spiral Galaxies, Star Formation, Stellar Luminosity, Galactic Nuclei, Galactic Rotation, Hydrogen, Molecular Gases, Star Formation Rate
Scientific paper
CO observations of the nuclei and disks of a sample of eight normal Sc galaxies are presented in order to determine the relative CO content in galaxies of a similar type, with a wide range in size, mass, and luminosity. Results show an approximately linear correlation between the CO and blue luminosities measured for the same regions in both the nuclei and the inner disks, which implies that the low-luminosity regions have little H2 while high luminosity regions have large amounts. Within this sample, the molecular masses out to a fixed radius of less than or equal to 2.5 kpc are found to range from less than six times 10 to the 7th solar masses for M33 to approximately two times 10 to the 9th solar masses for NGC 6946, while the ratio of H2 mass to blue luminosity is relatively constant. These results suggest that the star formation rate per nucleon in Sc galaxies is constant.
Scoville Nick
Young John S.
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