Direct determination of oxygen abundances in line emitting star-forming galaxies at intermediate redshift
- Author(s)
- José Manuel Pérez Martinez, Carlos Hoyos, Angeles I. Diaz, David C. Koo, Christopher N. A. Willmer
- 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.
- Organisation(s)
- Department of Astrophysics
- External organisation(s)
- Universidad Autónoma de Madrid, University of Arizona, University of California Observatories/Lick Observatory, University of California
- Journal
- Monthly Notices of the Royal Astronomical Society
- Volume
- 455
- Pages
- 3359 - 3366
- No. of pages
- 8
- ISSN
- 0035-8711
- DOI
- https://doi.org/10.1093/mnras/stv1949
- Publication date
- 01-2016
- Peer reviewed
- Yes
- Austrian Fields of Science 2012
- 103003 Astronomy, 103004 Astrophysics
- Keywords
- ASJC Scopus subject areas
- Astronomy and Astrophysics, Space and Planetary Science
- Portal url
- https://ucrisportal.univie.ac.at/en/publications/23d8e34e-e6b9-45b4-8357-8b18ae1713b4