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Astrophysics Luncheon Seminar

Abundance of Halos and Voids in the Excursion Set Approach
Presented by Ixandra Achitouv
University Observatory Munich

Monday, November 11, 2013
12:00 noon in 169-336

Abstract
Our picture of the present universe is mainly composed of voids and dark matter halos, the building blocks of cosmic structure. The halo mass function quantifies their number density as function of mass, and it is a key quantity to predicting several large-scale-structure observables. In this talk, I will review the latest theoretical advancements on the derivation of a halo mass function which encodes physical aspects of the halo formation process and is capable of reproducing numerical N-body simulation results with unprecedented accuracy. Finally I will apply the same formalism to compute void abundances and I will discuss current limitations of the void hierarchy model.

JPL Contact: Julian Merten (626-375-4366)


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