A rediscussion of sulfur abundances in Magellanic Clouds and galactic H II regions

Details A rediscussion of sulfur abundances in Magellanic Clouds and galactic H II regions A rediscussion of sulfur abundances in Magellanic Clouds and galactic H II regions

Feb 1983

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1983a%26a...118..234d&link_type=abstract

Astronomy and Astrophysics, vol. 118, no. 2, Feb. 1983, p. 234-244.

Astronomy and Astrophysics

Astronomy

71

Abundance, H Ii Regions, Infrared Astronomy, Magellanic Clouds, Milky Way Galaxy, Sulfur, Chemical Evolution, Compact Galaxies, Galactic Evolution, Infrared Spectra, Interstellar Matter, Near Infrared Radiation, Oxygen Ions, Planetary Nebulae, Visible Spectrum

Scientific paper

Near infrared spectra obtained with the ESO Reticon are presented for 23 H II regions in the Galaxy and the Magellanic Clouds and for one blue compact galaxy from which S(2+) abundances are derived. The optical spectra of these objects, taken from the literature, are reduced, using the most recent atomic data. The problem of correction for unseen ions of sulfur is reexamined, and the sulfur abundances in the sample are determined. Some implications on the chemical evolution of galaxies are presented, and the possibility of deriving sulfur abundances without the help of (S III) measurements is discussed in an appendix. The average S/O ratio is found to be roughly the same in all the galaxies considered, close to the solar value of 2.04 x 10 to the -2 and compatible with a production of oxygen and sulfur in massive stars.

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