Peak-background split and scale-dependent bias

by Prof. Vincent Desjacques (UniGe)

Wednesday 7 Dec 2011, 11:00 → 12:00 Europe/Zurich

4/2-011 - TH common room (CERN)

Understanding the scale-dependence of galaxy bias is crucial to extract meaningful constraints on, e.g., primordial non-Gaussianity. In this week's Cosmo Coffee, we will discuss how the peak-background split argument can be extended to derive scale-dependent bias corrections for Gaussian and generic non-Gaussian initial conditions. We will identify an important, but previously overlooked correction to the non-Gaussian bias, which yields theoretical predictions in much better agreement with the numerical data.

Suggested reading:

 

• R. Sheth & G. Tormen, 1999, MNRAS, 308, 119
• N. Dalal et al., 2008, PRD, 77, 3514
• A. Slosar et al., 2008, JCAP, 80, 031
• V. Desjacques et al., 2010, PRD, 82, 3529
• V. Desjacques, D. Jeong & F. Schmidt, 2011, PRD, 84, 3512