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Recently, Leauthaud et al discovered that the small-scale lensing signal of Baryon Oscillation Spectroscopic Survey (BOSS) galaxies is up to 40% lower than predicted by the standard models of the galaxy-halo connections that reproduced the observed galaxy stellar mass function (SMF) and clustering. We revisit such lensing is low discrepancy by performing a comprehensive Halo Occupation Distribution (HOD) modelling of the SMF, clustering, and lensing of BOSS LOWZ and CMASS samples at Planck cosmology. We allow the selection function of satellite galaxies to vary as a function of stellar mass as well as halo mass. For centrals we assume their selection to depend only on stellar mass, as informed by the directly measured detection fraction of the redMaPPer central galaxies. The best-fitting HOD successfully describes all three observables without over-predicting the small-scale lensing signal. This indicates that the model places BOSS galaxies into dark matter halos of the correct halo masses, thereby eliminating the discrepancy in the one-halo regime where the signal-to-noise of lensing is the highest. Despite the large uncertainties, the observed lensing amplitude above 1 Mpc/h remains inconsistent with the prediction, which is however firmly anchored by the large-scale galaxy bias measured by clustering at Planck cosmology. Therefore, we demonstrate that the lensing is low discrepancy on scales below 1 Mpc/h can be fully resolved by accounting for the halo mass dependence of the selection function. Lensing measurements with improved accuracy is required on large scales to distinguish between deviations from Planck and non-linear effects from galaxy-halo connections.
We present high signal-to-noise galaxy-galaxy lensing measurements of the BOSS CMASS sample using 250 square degrees of weak lensing data from CFHTLenS and CS82. We compare this signal with predictions from mock catalogs trained to match observables
A joint analysis of the clustering of galaxies and their weak gravitational lensing signal is well-suited to simultaneously constrain the galaxy-halo connection as well as the cosmological parameters by breaking the degeneracy between galaxy bias and
We construct cosmic microwave background lensing mass maps using data from the 2014 and 2015 seasons of observations with the Atacama Cosmology Telescope (ACT). These maps cover 2100 square degrees of sky and overlap with a wide variety of optical su
We use subhalo abundance matching (SHAM) to model the stellar mass function (SMF) and clustering of the Baryon Oscillation Spectroscopic Survey (BOSS) CMASS sample at $zsim0.5$. We introduce a novel method which accounts for the stellar mass incomple
General relativistic effects have long been predicted to subtly influence the observed large-scale structure of the universe. The current generation of galaxy redshift surveys have reached a size where detection of such effects is becoming feasible.