| Issue |
A&A
Volume 418, Number 2, May I 2004
|
|
|---|---|---|
| Page(s) | 475 - 485 | |
| Section | Extragalactic astronomy | |
| DOI | https://doi.org/10.1051/0004-6361:20035795 | |
| Published online | 09 April 2004 | |
The metallicity-luminosity relation at medium redshift based on faint CADIS emission line galaxies*
1
Max-Planck-Institut für Astronomie, Königstuhl 17, 69117 Heidelberg, Germany
2
Department of Physics, Swiss Federal Institute of Technology (ETH Zürich), ETH Hönggerberg, 8093, Zürich, Switzerland
Corresponding author: C. Maier, chmaier@phys.ethz.ch
Received:
3
December
2003
Accepted:
28
January
2004
The emission line survey within the Calar Alto Deep Imaging
Survey (CADIS) detects galaxies with very low continuum brightness by using an imaging Fabry-Perot interferometer. With spectroscopic follow-up observations of 
CADIS galaxies using FORS2 at the VLT and DOLORES at TNG we obtained oxygen abundances of 5 galaxies at 
and 10 galaxies at 
. Combining these measurements with published oxygen abundances of galaxies with 
we find evidence that a metallicity-luminosity relation exists at medium redshift, but it is displaced to lower abundances and higher luminosities compared to the metallicity-luminosity relation in the local universe.
Comparing the observed metallicities and luminosities of galaxies at 
with Pégase2 chemical evolution models we have found a favoured scenario in which the metallicity of galaxies increases by a factor of ~2 between 
and today, and their luminosity decreases by ~
mag.
Key words: galaxies: high-redshift / galaxies: abundances
© ESO, 2004
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