2001/05/21 by L. S. Pilyugin · 4 citations
Physics and Astronomy · #Astronomy and Astrophysical Research #Galaxies: Formation, Evolution, Phenomena #Stellar, planetary, and galactic studies #astro-ph
paper · pdf · doi:10.1051/0004-6361:20010732
9 pages, 5 figures, accepted for publication in Astronomy and Astrophysics
arxiv created 2001/05/21 · openalex publication_date 2001/08/01 · arxiv updated 2009/12/01 · openalex created_date 2016/06/24 · openalex updated_date 2026/07/31
The low-luminosity dwarf irregular galaxies are considered. The oxygen abundances in H ii regions of dwarf irregular galaxies were recalculated from published spectra through the recently suggested P-method. It has been found that the metallicity of low-luminosity dwarf irregular galaxies, with a few exceptions, correlates well with galaxy luminosity. The dispersion of oxygen abundances around the metallicity-luminosity relationship increases with decreasing galaxy luminosity, as was found by Richer & McCall (1995). The absence of a relationship between the oxygen abundance and the absolute magnitude in the blue band for irregular galaxies obtained by Hidalgo-Gámez & Olofsson (1998) can be explained by the large uncertainties in the oxygen abundances derived through the Te-method, that in turn can be explained by the large uncertainties in the measurements of the strengths of the weak oxygen line used in the Te-method.