The Evolution of the Mass-Metallicity Relation

Details The Evolution of the Mass-Metallicity Relation The Evolution of the Mass-Metallicity Relation

Dec 2004

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2004aas...205.3805m&link_type=abstract

American Astronomical Society Meeting 205, #38.05; Bulletin of the American Astronomical Society, Vol. 36, p.1405

Astronomy and Astrophysics

Astronomy

Scientific paper

We investigate the star-formation and chemical-abundance properties of ˜3500 field galaxies at 0< z<0.4 from the AGN and Galaxy Evolution Survey (AGES). AGES has obtained spectrophotometry for ˜10,000 galaxies brighter than R=19.2 in the NOAO Deep Wide-Field Survey (NDWFS) Bootes field, which has existing BwRIK and Spitzer 3.6-160-micron imaging. We use population synthesis to derive accurate stellar absorption corrections and estimates of the dust reddening from the Balmer decrement. We study the metallicity, excitation, and star-formation properties of our sample as a function of luminosity and stellar mass. We quantify the evolution in the mass-metallicity relation over the past ˜4 Gyr by comparing our results with the mass-metallicity relation derived locally from the Sloan Digital Sky Survey. Observations reported here were obtained at the MMT Observatory, a joint facility of the Smithsonian Institution and the University of Arizona.

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