Weak lensing constraints on splashback around massive clusters

Understand

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 careful control of residual systematics effects.
• We find that the shear introduced by the presence of additional structure along the line of sight significantly affects the noise at large clustercentric distances.