Astronomy and Astrophysics – Astronomy
Scientific paper
Oct 1986
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1986pasp...98.1009p&link_type=abstract
Astronomical Society of the Pacific, Publications (ISSN 0004-6280), vol. 98, Oct. 1986, p. 1009-1011.
Astronomy and Astrophysics
Astronomy
13
Abundance, Galaxies, Nebulae, Electron Energy, H Ii Regions, Oxygen Spectra, Stellar Temperature
Scientific paper
Some current problems related to abundances in H II regions are briefly reviewed. For H II regions with measured electron temperatures, the discrepancy in O/H between the sun and the Orion Nebula is stressed. Studies of abundance and temperature variations within H II regions in NGC 604 are summarized. These studies are yielding data on those line ratios which are sufficiently constant to be used as parameters characterizing an H II region as a whole and as potential abundance indicators. Attempts to model low-excitation H II regions are reviewed, and it is concluded that abundances in such regions will be obtained by such modelling in the near future.
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