The Diffuse Light Envelope of Luminous Red Galaxies
  We use a stacking method to study the radial light profiles of luminous red
galaxies (LRGs) at redshift $\sim 0.62$ and $\sim 0.25$, out to a radial range
of 200 kpc. We do not find noticeable evolution of the profiles at the two
redshifts. The LRG profiles appear to be well approximated by a single Sersic
profile, although some excess light can be seen outside 60 kpc. We quantify the
excess light by measuring the integrated flux and find that the excess is about
10\% -- a non-dominant but still nonnegligible component.
