your ID: 0290 
First Name: Yanchun 
Last Name: Liang 
Affiliation: NAOC, China 

Title: The oxygen abundance calibrations from ~40,000 star-forming galaxies 
Authors: Liang Y. C., Yin S. Y., Hammer, F. et al. 
Topic: 9 
Session: oral 

Abstract: We select a large sample of ~40,000 star-forming galaxies 
from the SDSS-DR2, and derive analytical calibrations for oxygen abundances 
from their several metallicity-sensitive emission-line ratios: [N II]/H\\alpha,
 [O III]/[N II], [N II]/[O II], [N II]/[S II], [S II]/H\\alpha, and [O II]/H\\beta. 
This consistent set of strong-line oxygen abundance calibrations will be useful 
for future abundance studies. The observed relations are consistent with those 
expected from the photoionization models of Kewley \\& Dopita (2002), but 
spread in a relative narrower range of ionization parameters than the models.