Splashback Radius ·
A Cluster's True Edge
un
seel
.com · secondary infall · first-orbit apocenter · caustic
R
sp
/ R
200m
—
Accretion Γ
—
Feature
—
R₂₀₀ₘ (virial convention)
Splashback caustic (R_sp)
Turnaround / cosmic infall
Orbiting matter parcels
Density profile d ln ρ / d ln r
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.com · The Splashback Radius: A Galaxy Cluster's True Edge