Tessellating the Universe: the Zel'dovich and Adhesion tiling of space

Understand

The adhesion approximation is a simple analytical model suggested for explanation of the major geometrical features of the observed structure in the galaxy distribution on scales from 1 to (a few)x100/h Mpc.

• It is based on Burgers' equation and therefore allows analysis in considerable detail.
• A particular version of the model that assumes the infinitesimal viscosity naturally results in irregular tessellation of the universe.
• Generic elements of the tessellation: vertices, edges, faces and three-dimensional tiles can be associated with astronomical objects of different kinds: clusters, superclusters and voids of galaxies.