Lensing Measurements of the Mass Distribution in SDSS Voids
  We measure weak lensing mass profiles of voids from a volume-limited sample
of SDSS Luminous Red Galaxies (LRGs). We find voids using an algorithm designed
to maximize the lensing signal by dividing the survey volume into 2D slices,
and then finding holes in this 2D distribution of LRGs. We perform a stacked
shear measurement on about 20,000 voids with radii between 15-55 Mpc/h and
redshifts between 0.16-0.37. We measure the characteristic radial shear signal
of voids with a signal-to-noise of 7. The mass profile corresponds to a
fractional underdensity of about -0.4 inside the void radius and a slow
approach to the mean density indicating a partially compensated void structure.
We compare our measured shape and amplitude with the predictions of Krause et
al 2013. Voids in the galaxy distribution have been extensively modeled using
simulations and measured in the SDSS. We discuss how the addition of void mass
profiles can enable studies of galaxy formation and cosmology.
