On the universality of luminosity-metallicity and mass-metallicity relations for compact star-forming galaxies at redshifts 0 < z < 3
Abstract
We study relations between global characteristics of low-redshift (0 < z < 1) compact star-forming galaxies, including absolute optical magnitudes, H β emission-line luminosities (or equivalently star formation rates), stellar masses, and oxygen abundances. The sample consists of 5182 galaxies with high-excitation H II regions selected from the SDSS DR7 and SDSS/BOSS DR10 surveys adopting a criterion [O III] λ4959/H β ≥ 1. These data were combined with the corresponding data for high-redshift (2 ≲ z ≲ 3) star-forming galaxies. We find that in all diagrams low-z and high-z star-forming galaxies are closely related indicating a very weak dependence of metallicity on stellar mass, redshift, and star formation rate. This finding argues in favour of the universal character of the global relations for compact star-forming galaxies with high-excitation H II regions over redshifts 0 < z < 3.
- Publication:
-
Monthly Notices of the Royal Astronomical Society
- Pub Date:
- August 2015
- DOI:
- 10.1093/mnras/stv1115
- arXiv:
- arXiv:1505.05853
- Bibcode:
- 2015MNRAS.451.2251I
- Keywords:
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- galaxies: abundances;
- galaxies: dwarf;
- galaxies: fundamental parameters;
- galaxies: ISM;
- galaxies: starburst;
- Astrophysics - Astrophysics of Galaxies
- E-Print:
- 13 pages, 10 figures, accepted for publication in MNRAS