Journal
MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY
Volume 468, Issue 3, Pages 2605-2613Publisher
OXFORD UNIV PRESS
DOI: 10.1093/mnras/stx517
Keywords
gravitational lensing: weak; galaxies: elliptical and lenticular, cD; dark matter; large-scale structure of Universe
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Funding
- NSERC
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In the standard model of non-linear structure formation, a cosmic web of dark-matterdominated filaments connects dark matter haloes. In this paper, we stack the weak lensing signal of an ensemble of filaments between groups and clusters of galaxies. Specifically, we detect the weak lensing signal, using CFHTLenS galaxy ellipticities, from stacked filaments between Sloan Digital Sky Survey (SDSS)-III/Baryon Oscillation Spectroscopic Survey luminous red galaxies (LRGs). As a control, we compare the physical LRG pairs with projected LRG pairs that are more widely separated in redshift space. We detect the excess filament mass density in the projected pairs at the 5s level, finding a mass of (1.6 +/- 0.3) x 10(13) M-circle dot for a stacked filament region 7.1 h(-1) Mpc long and 2.5 h(-1) Mpc wide. This filament signal is compared with a model based on the three-point galaxy-galaxy-convergence correlation function, as developed in Clampitt et al., yielding reasonable agreement.
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