J/MNRAS/362/1143 Emission-line galaxies [OII]/Hα ratio (Mouhcine+, 2005)
The [OII]λ3727/Hα ratio of emission-line galaxies in the
2dF Galaxy Redshift Survey.
Mouhcine M., Lewis I., Jones B., Lamareille F., Maddox S.J., Contini T.
<Mon. Not. R. Astron. Soc., 362, 1143-1156 (2005)>
=2005MNRAS.362.1143M 2005MNRAS.362.1143M (SIMBAD/NED BibCode)
ADC_Keywords: Galaxy catalogs ; Abundances
Keywords: surveys - galaxies: fundamental parameters - galaxies: general -
galaxies: statistics
Abstract:
We investigate the systematic variation of the [OII]3727/Hα flux line
ratio as a function of various galaxy properties, i.e. luminosity,
metallicity, reddening and excitation state, for a sample of 1124
emission-line galaxies, with a mean redshift z∼0.06, drawn from the
2dF Galaxy Redshift Survey. The mean observed and extinction-corrected
emission-line flux ratios agree well with the values derived from the
B-band selected Nearby Field Galaxy Survey galaxy sample, but are
significantly different from the values obtained from the Hα-selected
Universidad Complutense de Madrid Survey galaxy sample. This is
because the different selection criteria applied in these surveys lead
to a significant difference in the mean extinction and metallicity of
different samples.
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Authors' address: Mustapha Mouhcine,
(End) Patricia Vannier [CDS] 11-May-2006