Is assembly bias driven by the saddle points of the cosmic web?
The mass function of the dark matter halos in which galaxies are
found can be rather well approximated using the excursion set
theory. Using this theory, we are able to predict the mass
ditribution as well as the accretion rates and the formation times
of halos. In this work, we have provided an extension to the
excursion set theory to account for the anisotropy induced by the
cosmic web, and especially the saddle points (center of
We provide two online representation of the typical density (blue) and the specific accretion rate (red) in the frame of a saddle point of the potential before a Zeldovich boost and after a Zeldovich boost.
The paper will be available soon on the Arxiv