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Oxygen and nitrogen abundances in Virgo and field spirals
L. S. Pilyugin, Mercedes Molla, Federico Ferrini +1
The oxygen and nitrogen abundances in the HII regions of the nine Virgo spirals of the sample from Skillman et al (1996) and in nine field spiral galaxies are re-determined with th…
Oxygen abundances in dwarf irregular galaxies and the metallicity - luminosity relationship
L. S. Pilyugin
The low-luminosity dwarf irregular galaxies are considered. The oxygen abundances in HII regions of dwarf irregular galaxies were recalculated from published spectra through the re…
The oxygen abundance distribution in M101
L. S. Pilyugin
The well-observed spiral galaxy M101 was considered. The radial distributions of oxygen abundances determined in three different ways (with the classic Te - method, with the R23 -…
On the oxygen abundance determination in HII regions: High - metallicity regions
L. S. Pilyugin
This is our second paper devoted to the problem of line intensity - oxygen abundance calibration starting from the idea of McGaugh (1991) that the strong oxygen lines contain the n…