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Methods to Calibrate Oxygen Abundances of Star-Forming Galaxies and the Recent Results from the Large Sample of SDSS Galaxies Galaxies

Published online by Cambridge University Press:  01 August 2006

Y. C. Liang ,
S. Y. Yin  and
F. Hammer
Y. C. Liang
Affiliation:
National Astronomical Observatories, Chinese Academy of Sciences, 20A Datun Road, Chaoyang District, Beijing 100012, China; email: ycliang@bao.ac.cn
S. Y. Yin
Affiliation:
National Astronomical Observatories, Chinese Academy of Sciences, 20A Datun Road, Chaoyang District, Beijing 100012, China; email: ycliang@bao.ac.cn Department of Physics, Hebei Normal University, Shijiazhuang 050016, China
F. Hammer
Affiliation:
GEPI, Observatoire de Paris-Meudon, 92195 Meudon, France
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Abstract

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Using a large sample of ~40,000 star-forming galaxies selected from the SDSS, we derive oxygen abundance calibrations from strong-line ratios, such as [N II]/Hα, [O III]/[N II], [N II]/[O II], [N II]/[S II], [S II]/Hα, and [O III]/Hβ. The derived analytic calibrations cover a quite wide range of metallicity, from 12+log(O/H)= 7.1 to 9.3. These calibrations can be used as calibration references for the future studies about metallicities of star-forming galaxies.

Keywords

galaxies: abundancesevolutionISMspiralstarburst
Type
Contributed Papers
Information
Proceedings of the International Astronomical Union , Volume 2 , Symposium S235: Galaxy Evolution Across the Hubble Time , August 2006 , pp. 319
Copyright
Copyright © International Astronomical Union 2007