Weak lensing constraints on splashback around massive clusters

  title={Weak lensing constraints on splashback around massive clusters},
  author={Omar Contigiani and Henk Hoekstra and Yannick M Bah{\'e}},
  journal={Monthly Notices of the Royal Astronomical Society},
The splashback radius $r_\text{sp}$ separates the physical regimes of collapsed and infalling material around massive dark matter haloes. In cosmological simulations, this location is associated with a steepening of the spherically averaged density profile $\rho(r)$. In this work, we measure the splashback feature in the stacked weak gravitational lensing signal of $27$ massive clusters from the Cluster Canadian Comparison Project with a careful control of residual systematics effects. We find… 

Figures and Tables from this paper

The Splashback Radius of Planck SZ Clusters
We present evidence for the existence of the splashback radius in galaxy clusters selected using the Sunyaev-Zel'dovich effect. We show that the deprojected cross-correlation of galaxy clusters found
How accurately can we detect the splashback radius of dark matter haloes and its correlation with accretion rate?
The splashback radius ($R_{\rm sp}$) of dark matter halos has recently been detected using weak gravitational lensing and cross-correlations with galaxies. However, different methods have been used
The splashback radius of optically selected clusters with Subaru HSC Second Public Data Release
Recent constraints on the splashback radius around optically selected galaxy clusters from the redMaPPer cluster-finding algorithm in the literature have shown that the observed splashback radius
Stellar splashback: the edge of the intracluster light
We examine the outskirts of galaxy clusters in the C-EAGLE simulations to quantify the "edges" of the stellar and dark matter distribution. The radius of the steepest slope in the dark matter,
Splashback radius in symmetron gravity
The splashback radius rsp has been identified in cosmological N-body simulations as an important scale associated with gravitational collapse and the phase-space distribution of recently accreted
Discovery of a possible splashback feature in the intracluster light of MACS J1149.5+2223
We present an analysis of the intracluster light (ICL) in the Frontier Field Cluster MACS J1149.5+2223 (z = 0.544), which combines new and archival Hubble WFC3/IR imaging to provide continuous
Mass accretion rates of clusters of galaxies: CIRS and HeCS
We use a new spherical accretion recipe tested on N-body simulations to measure the observed mass accretion rate (MAR) of 129 clusters in the CIRS and HeCS. The observed clusters cover the redshift
Evolution of splashback boundaries and gaseous outskirts: insights from mergers of self-similar galaxy clusters
A self-similar spherical collapse model predicts a dark matter (DM) splashback and accretion shock in the outskirts of galaxy clusters while misses a key ingredient of structure formation – processes
Probing Galaxy Evolution in Massive Clusters Using ACT and DES: Splashback as a Cosmic Clock
We measure the projected number density profiles of galaxies and the splashback feature in clusters selected by the Sunyaev–Zel’dovich effect from the Advanced Atacama Cosmology Telescope (AdvACT)
Measurement of the splashback feature around SZ-selected Galaxy clusters with DES, SPT, and ACT
We present a detection of the splashback feature around galaxy clusters selected using the Sunyaev–Zel’dovich (SZ) signal. Recent measurements of the splashback feature around optically selected


The Splashback Feature around DES Galaxy Clusters: Galaxy Density and Weak Lensing Profiles
Splashback refers to the process of matter that is accreting onto a dark matter halo reaching its first orbital apocenter and turning around in its orbit. The clustercentric radius at which this
The splashback radius as a physical halo boundary and the growth of halo mass
The boundaries of cold dark matter halos are commonly defined to enclose a density contrast $\Delta$ relative to a reference (mean or critical) density. We argue that a more physical boundary of
Lensing Constraints on the Mass Profile Shape and the Splashback Radius of Galaxy Clusters
The lensing signal around galaxy clusters can, in principle, be used to test detailed predictions for their average mass profile from numerical simulations. However, the intrinsic shape of the
The outer profile of dark matter haloes: an analytical approach
A steepening feature in the outer density profiles of dark matter halos indicating the splashback radius has drawn much attention recently. Possible observational detections have even been made for
Weak Lensing Analysis of Cl 1358+62 Using Hubble Space Telescope Observations*
We report on the detection of weak gravitational lensing of faint, distant background objects by Cl 1358+62, a rich cluster of galaxies at a redshift of z = 0.33. The observations consist of a large,
Splashback in galaxy clusters as a probe of cosmic expansion and gravity
The splashback radius is a physical scale in dark matter halos that is set by the gravitational dynamics of recently accreted shells. We use analytical models and N-body simulations to study the
On the Level of Cluster Assembly Bias in SDSS
Recently, several studies have discovered a strong discrepancy between the large-scale clustering biases of two subsamples of galaxy clusters at the same halo mass, split by their average projected
We outline our methods for obtaining high-precision mass profiles, combining independent weak-lensing distortion, magnification, and strong-lensing measurements. For massive clusters, the strong- and
How well can we determine cluster mass profiles from weak lensing
Weak gravitational lensing provides a direct way to study the mass distribution of clusters of galaxies at large radii. Unfortunately, large-scale structure along the line of sight also contributes
CLASH: Joint analysis of strong-lensing, weak-lensing shear, and magnification data for 20 galaxy clusters*
We present a comprehensive analysis of strong-lensing, weak-lensing shear and magnification data for a sample of 16 X-ray-regular and 4 high-magnification galaxy clusters at 0.19 ≾ z ≾ 0.69 selected