Abundance determination in H ii regions from spectra without the [O ii]lambda 3727+lambda 3729 line
2011 (English)In: Monthly notices of the Royal Astronomical Society, ISSN 0035-8711, E-ISSN 1365-2966, Vol. 412, no 2, 1145-1150 p.Article in journal (Refereed) Published
We suggest an empirical calibration for the determination of oxygen and nitrogen abundances and electron temperature in H ii regions in which the [O ii]lambda 3727+lambda 3729 line (R-2) is not available. The calibration is based on the strong emission lines of O++, N+ and S+ (NS calibration) and derived using the spectra of H ii regions with measured electron temperatures as calibration data points. The NS calibration makes it possible to derive abundances for H ii regions in nearby galaxies from Sloan Digital Sky Survey (SDSS) spectra in which the R-2 line is out of the measured wavelength range, but it can also be used for oxygen and nitrogen abundance determinations in any H ii region independently of whether the nebular oxygen line [O ii]lambda 3727+lambda 3729 is available or not. The NS calibration provides reliable oxygen and nitrogen abundances for H ii regions over the whole range of metallicities.
Place, publisher, year, edition, pages
2011. Vol. 412, no 2, 1145-1150 p.
ISM: abundances, H ii regions, galaxies: abundances
IdentifiersURN: urn:nbn:se:uu:diva-152780DOI: 10.1111/j.1365-2966.2010.17970.xISI: 000288549900033OAI: oai:DiVA.org:uu-152780DiVA: diva2:414083