Oxygen and nitrogen abundances of Hii regions in six spiral galaxiesстатья
Статья опубликована в высокорейтинговом журнале
Информация о цитировании статьи получена из
Web of Science,
Scopus
Статья опубликована в журнале из списка Web of Science и/или Scopus
Дата последнего поиска статьи во внешних источниках: 18 июля 2013 г.
Аннотация:Spectroscopic observations of 63 H ii regions in six spiral galaxies (NGC628, NGC783, NGC2336, NGC6217, NGC?7331 and NGC?7678) 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 2.1angstrom/pixel-1 and a spectral resolution of 10angstrom. These observations were used to estimate the oxygen and nitrogen abundances and the electron temperatures in H ii 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 luminositycentral metallicity diagram for spiral and irregular galaxies.