Publication Date:
2015-12-01
Description:
We present a sample of 22 blue [( B – V ) AB 〈 0.45], luminous ( M B , AB 〈 –18.9), metal-poor galaxies in the 0.69 〈 z 〈 0.88 redshift range, selected from the DEEP2 galaxy redshift survey. Their spectra contain the [O iii ] 4363 auroral line, the [O ii ] 3726, 3729 doublet and the strong nebular [O iii ] 4959, 5007 emission lines. The ionized gas-phase oxygen abundances of these galaxies lie between 7.62 〈 12 + log O/H 〈 8.19, i.e., between 1/10 Z and 1/3 Z . We find that galaxies in our sample have comparable metallicities to other intermediate-redshift samples, but are more metal poor than local systems of similar B -band luminosities and star formation activity. The galaxies here show similar properties to the green peas discovered at z ~= 0.2–0.3, though our galaxies tend to be slightly less luminous.
Print ISSN:
0035-8711
Electronic ISSN:
1365-2966
Topics:
Physics
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