Towards understanding the structure of voids in the cosmic web

Understand

Our goal is to see how density waves of different scale combine to form voids between galaxy systems of various scale.

• We perform numerical simulations of structure formation in cubes of size 100 and 256 Mpc/h, with resolutions 256^3 and 512^3 particles and cells.
• To understand the role of density perturbations of various scale we cut power spectra at scales from 8 to 128 Mpc/h, using in all series identical initial random realisations.
• We find that small haloes and short filaments form all over the simulation box, if perturbations only up to scale 8 Mpc/h are present.