ACP Seminar (Astronomy - Cosmology - Particle Physics)

Speaker: Ravi Sheth (ICTP)
Title: Cosmology with clusters, voids and their profiles
Date (JST): Thu, Apr 24, 2014, 13:30 - 15:00
Place: Seminar Room A
Related File: 1184.pdf
Abstract: I will summarize recent progress in our understanding of how the abundance and spatial distribution of clusters and voids in the large scale galaxy distribution constrain the nature of the initial fluctuation field, the expansion history of the universe and the nature of gravity. Along the way I will describe a class of non Markovian random walks which turns out to be useful for understanding the phenomenon of Assembly Bias, which some believe will be an important systematic in the next generation of galaxy surveys. I will also describe the close connection between the abundance of such objects and their density profiles, outlining some new relations between observables which this analysis uncovers.