Abstract
We present a sample of 22 blue [(B - V)AB < 0.45], luminous (MB,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] λ4363 auroral line, the [OII] λλ3726, 3729 doublet and the strong nebular [O III] λλ4959, 5007 emission lines. The ionized gas-phase oxygen abundances of these galaxies lie between 7.62 < 12 + logO/H < 8.19, i.e., between 1/10 Z⊙ and 1/3 Z⊙. We find that galaxies in our sample have comparablemetallicities 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.
| Original language | English (US) |
|---|---|
| Pages (from-to) | 3359-3366 |
| Number of pages | 8 |
| Journal | Monthly Notices of the Royal Astronomical Society |
| Volume | 455 |
| Issue number | 3 |
| DOIs | |
| State | Published - Jan 21 2016 |
Keywords
- Galaxies: abundances
- Galaxies: evolution
- Galaxies: high-redshift
ASJC Scopus subject areas
- Astronomy and Astrophysics
- Space and Planetary Science