Oxygen and nitrogen abundances of Hii regions in six spiral galaxies

Spectroscopic observations of 63 Hii regions in six spiral galaxies (NGC628, NGC783, NGC2336, NGC6217, NGC7331 and NGC7678) were carried out with the 6-m telescope (BTA) of Russian Special Astrophysical Observatory with the Spectral Camera attached to the focal reducer SCORPIO in multislit mode with...

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Published inMonthly notices of the Royal Astronomical Society Vol. 424; no. 3; p. 1930
Main Authors Gusev, A. S, Pilyugin, L. S, Sakhibov, F, Dodonov, S. N, Ezhkova, O. V, Khramtsova, M. S
Format Journal Article
LanguageEnglish
Published London Oxford University Press 11.08.2012
Subjects
Astrophysics
Nitrogen
Oxygen
Spectrum analysis
Stars & galaxies
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Summary:Spectroscopic observations of 63 Hii regions in six spiral galaxies (NGC628, NGC783, NGC2336, NGC6217, NGC7331 and NGC7678) were carried out with the 6-m telescope (BTA) of Russian Special Astrophysical Observatory with the Spectral Camera attached to the focal reducer SCORPIO in multislit mode with a dispersion of 2.1Åpixel-1 and a spectral resolution of 10Å. These observations were used to estimate the oxygen and nitrogen abundances and the electron temperatures in Hii regions through the recent variant of the strong-line method (NS calibration). The parameters of the radial distribution (the extrapolated central intercept value and the gradient) of the oxygen and nitrogen abundances in the discs of spiral galaxies NGC628, NGC783, NGC2336, NGC7331 and NGC7678 have been determined. The abundances in NGC783, NGC2336, NGC6217 and NGC7678 are measured for the first time. Galaxies from our sample follow well the general trend in the luminosity-central metallicity diagram for spiral and irregular galaxies. [PUBLICATION ABSTRACT]
ISSN:0035-8711
1365-2966
DOI:10.1111/j.1365-2966.2012.21322.x