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Date and Time of the Query: 2019-05-23 T02:06:04 PDT
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For refcode 2014AJ....147..131P:
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2014AJ....147..131P The Abundance Properties of Nearby Late-type Galaxies. I. The Data Pilyugin, L. S.; Grebel, E. K.; Kniazev, A. Y. Abstract. We investigate the oxygen and nitrogen abundance distributions across the optical disks of 130 nearby late-type galaxies using around 3740 published spectra of H II regions. We use these data in order to provide homogeneous abundance determinations for all objects in the sample, including H II regions in which not all of the usual diagnostic lines were measured. Examining the relation between N and O abundances in these galaxies we find that the abundances in their centers and at their isophotal R_25_ disk radii follow the same relation. The variation in N/H at a given O/H Is around 0.3 dex. We suggest that the observed spread in N/H may be partly caused by the time delay between N and O enrichment and the different star formation histories in galaxies of different morphological types and dimensions. We study the correlations between the abundance properties (central O and N abundances, radial O and N gradients) of a galaxy and its morphological type and dimension. Key words: galaxies: abundances, galaxies: irregular, galaxies: ISM, galaxies: spiral
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