The abundance properties of nearby late-type galaxies

• Verfasst von: Pilyugin, Leonid S.
• Verfasst von: Grebel, Eva K.
• Verfasst von: Kniazev, Alexei Y.
• Titel: The abundance properties of nearby late-type galaxies
• Titelzusatz: I. the data
• Verf.angabe: L.S. Pilyugin, E.K. Grebel, and A.Y. Kniazev
• E-Jahr: 2014
• Jahr: 2014 May 1
• Umfang: 24 S.
• Fussnoten: Gesehen am 29.07.2014
• Titel Quelle: In: The astronomical journal
• Ort Quelle: London : Institute of Physics Publ., 1998
• Jahr Quelle: 2014
• Band/Heft Quelle: 147(2014,6) Artikel-Nummer 131, 24 Seiten
• ISSN Quelle: 1538-3881
• DOI: doi:10.1088/0004-6256/147/6/131
• Datenträger: Online-Ressource
• Sprache: eng
• K10plus-PPN: 1480171328

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.