Oxygen abundance in the Sloan Digital Sky Survey
Oxygen abundance in the Sloan Digital Sky Survey
复制标题
斯隆数字巡天中的氧气丰度
DOI:
10.1051/0004-6361:20054524
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发表时间:
2006-03
影响因子:
6.5
通讯作者:
Kong, X
中科院分区:
文献类型:
--
作者:
Shi, F;Cheng, FZ;Kong, X
Aims. To assess the possible systematic differences among different oxygen abundance indicators and understand the origin of nitrogen and the stars responsible for nitrogen production, we present two samples of H II galaxies from the Sloan Digital Sky Survey (SDSS) spectroscopic observations, data release 3. Methods. The electron temperatures (T e ) of 225 galaxies are calculated with the photoionized H II model and T e of 3997 galaxies are calculated with an empirical method. The oxygen abundances from the T e methods of the two samples are determined reliably. The oxygen abundances from a strong line metallicity indicator, such as R 23 , P, N2, and 03N2, are also calculated. We compared oxygen abundances of H II galaxies obtained .with the T e method, R 23 method, P method, N2 method, and O3N2 method. Results. The oxygen abundances derived with the T e method are systematically lower by ∼0.2 dex than those derived with the R 23 method, consistent with previous studies based on H II region samples. No clear offset for oxygen abundance was found between T e metallicity and P, N2 and 03N2 metallicity. When we studied the relation between N/O and O/H, we found that in the metallicity regime of 12 + log(O/H) > 7.95, the large scatter of the relation can be explained by the contribution of small mass stars to the production of nitrogen. In the high metallicity regime, 12 + log(O/H) > 8.2, nitrogen is primarily a secondary element produced by stars of all masses.
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DOI:
10.1086/306708
发表时间:
1998-11
期刊:
The Astrophysical Journal
影响因子:
--
作者:
Y. Izotov;T. Thuan
通讯作者:
Y. Izotov;T. Thuan
影响因子:
3.5
作者:
R. Shaw;R. Dufour
通讯作者:
R. Shaw;R. Dufour
DOI:
10.1007/s001590000005
发表时间:
1999-11
期刊:
The Astronomy and Astrophysics Review
影响因子:
--
作者:
D. Kunth;G. Östlin
通讯作者:
D. Kunth;G. Östlin
DOI:
10.1086/344761
发表时间:
2001-05
期刊:
The Astronomical Journal
影响因子:
--
作者:
M. Blanton;Huan Lin;R. Lupton;F. M. Maley;N. Young;I. Zehavi;J. Loveday
通讯作者:
M. Blanton;Huan Lin;R. Lupton;F. M. Maley;N. Young;I. Zehavi;J. Loveday
DOI:
10.1046/j.1365-8711.2002.05042.x
发表时间:
2001-09
影响因子:
4.8
作者:
T. Contini;M. Treyer;M. Sullivan;R. Ellis
通讯作者:
T. Contini;M. Treyer;M. Sullivan;R. Ellis