Metallicity Gradients in Simulated Disk Galaxies
  The stellar metallicity and abundance ratio gradients from the fiducial
late-type galaxy simulation of Stinson et al. (2010) are presented. Over 1-3
scalelengths, gradients are shown to flatten with time, consistent with
empirical evidence at high- and low-redshifts. Kinematic effects, including
radial migration, though, flatten these intrinsicly steep gradients such that
by redshift z=0, the measured gradients of these (now) old stars are flatter
than their young counterparts, in contradiction to what is observed locally.
Conversely, the stellar [O/Fe] gradient is (to first order) robust against
migration, remaining fairly flat for both young and old populations today.
