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Formation times, mass growth histories and concentrations of dark matter haloes
Carlo Giocoli, Giuseppe Tormen, Ravi K. Sheth
We develop a simple model for estimating the mass growth histories of dark matter halos. The model is based on a fit to the formation time distribution, where formation is defined…
The luminosities of the brightest cluster galaxies and brightest satellites in SDSS groups
Aseem Paranjape, Ravi K. Sheth
We show that the distribution of luminosities of Brightest Cluster Galaxies in an SDSS-based group catalog suggests that BCG luminosities are just the statistical extremes of the g…
A hierarchy of voids: More ado about nothing
Aseem Paranjape, Tsz Yan Lam, Ravi K. Sheth
We extend earlier work on the problem of estimating the void-volume function -- the abundance and evolution of large voids which grow gravitationally in an expanding universe -- in…
How unusual are the Shapley Supercluster and the Sloan Great Wall?
Ravi K Sheth, Antonaldo Diaferio
We use extreme value statistics to assess the significance of two of the most dramatic structures in the local Universe: the Shapley supercluster and the Sloan Great Wall. If we as…
Halo bias in the excursion set approach with correlated steps
Aseem Paranjape, Ravi K. Sheth
In the Excursion Set approach, halo abundances and clustering are closely related. This relation is exploited in many modern methods which seek to constrain cosmological parameters…
Halo abundances and counts-in-cells: The excursion set approach with correlated steps
Aseem Paranjape, Tsz Yan Lam, Ravi K. Sheth
The Excursion Set approach has been used to make predictions for a number of interesting quantities in studies of nonlinear hierarchical clustering. These include the halo mass fun…