Low Metallicity Galaxies at z ~ 0.7: Keys to the Origins of Metallicity Scaling Laws
Abstract
We present a study of remarkably luminous and unique dwarf galaxies at redshifts of 0.5 < z < 0.7, selected from the DEEP2 Galaxy Redshift survey by the presence of the temperature sensitive [OIII]λ4363 emission line. Measurements of this important auroral line, as well as other strong oxygen lines, allow us to estimate the integrated oxygen abundances of these galaxies accurately without being subject to the degeneracy inherent in the standard R23 system used by most studies. [O/H] estimates range between 1/5-1/10 of the solar value. Not surprisingly, these systems are exceedingly rare and hence represent a population that is not typically present in local surveys such as SDSS, or smaller volume deep surveys such as GOODS.
- Publication:
-
Low-Metallicity Star Formation: From the First Stars to Dwarf Galaxies
- Pub Date:
- December 2008
- DOI:
- 10.1017/S1743921308025143
- Bibcode:
- 2008IAUS..255..397R
- Keywords:
-
- surveys;
- galaxies: abundances;
- galaxies: kinematics;
- galaxies: starburst