Slice of the 3D density field. Upper panels: initial and final density contrast. AGN are shown on top of the final density field. Bottom left panel: different structures defined by a threshold in the density contrast δ = −0.6 following the approach in Constantin et al. (2008). However, Constantin et al. (2008) defined the density field by smoothing the galaxy distribution which might result in thinner structures. Bottom right panel: cosmic web structures according to a web-type classifier based on the tidal shear tensor.
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