http://arxiv.org/abs/1402.3302
We search for the lensing signal of massive filaments between 220,000 pairs of Luminous Red Galaxies (LRGs) from the Sloan Digital Sky Survey. We use a nulling technique to remove the contribution of the LRG halos, resulting in a $10 \sigma$ detection of the filament lensing signal. We compare the measurements with halo model predictions based on a calculation of 3-point halo-halo-mass correlations. Comparing the “thick” halo model filament to a “thin” string of halos, thick filaments larger than a Mpc in width are clearly preferred by the data.
J. Clampitt, B. Jain and M. Takada
Mon, 17 Feb 14
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