Gas-phase metallicity of 27 galaxies at intermediate redshift
Abstract
Aims: The purpose of this work is to make available new gas-phase oxygen abundance measurements for a serendipitous sample of 27 galaxies with redshifts 0.35 ≤ z ≤ 0.52.
Methods: We measured the equivalent widths of the [O ii]λ3727, Hβ, and [O iii]λλ4959,5007 emission lines observed in the galaxy spectra obtained with the Visible Multi-Object Spectrograph mounted at the Very Large Telescope. For each galaxy, we derived the metallicity-sensitive emission-line ratio R23, ionization-sensitive emission-line ratio O32, and gas-phase oxygen abundance 12 + log (O/H).
Results: The values of the gas-phase oxygen abundance 12 + log (O/H) that we obtained for all the sample galaxies are consistent with previous findings for galaxies at intermediate redshift.
- Publication:
-
Astronomy and Astrophysics
- Pub Date:
- August 2012
- DOI:
- 10.1051/0004-6361/201219316
- arXiv:
- arXiv:1206.6300
- Bibcode:
- 2012A&A...544A..74M
- Keywords:
-
- galaxies: distances and redshifts;
- galaxies: evolution;
- galaxies: formation;
- galaxies: fundamental parameters;
- galaxies: ISM;
- Astrophysics - Cosmology and Nongalactic Astrophysics
- E-Print:
- 5 pages, 3 postscript figures and 3 tables. A&