The Metallicity History of Disk Galaxies
Institute for Astronomy
University of Hawaii
University of Wyoming
We present results of our investigation into the metallicity history of disk
galaxies between redshifts 0<z<3. Theory predicts
that metallicity changes less rapidly than star formation rate as a
function of redshift, but until now, there has been no observational
foundation for the metallicity history of star-forming galaxies.
Our local comparison samples include the
Nearby Field Galaxy Survey (NFGS) and an objectively selected sample of
We find that the central metallicities in close pairs are affected by gas flows triggered
by an interaction. We compare the metallicity properties of our local field galaxies
with a large sample of galaxies from the GOODS Field North and the Lyman Break Galaxies.
In our preliminary analysis, we observe metallicity evolution of 0.15 dex per