8-13 August 2011
Rhode Island Convention Center
US/Eastern timezone

Testing Inflation with Dark Matter Halos (Primordial Non-Gaussianity in Large-scale Structure)

12 Aug 2011, 08:40
20m
556 (Rhode Island Convention Center)

556

Rhode Island Convention Center

Parallel contribution Particle Astrophysics and Cosmology Particle Astrophysics and Cosmology

Speaker

Dr Marilena Loverde (Institute for Advanced Study)

Description

Cosmic inflation provides a mechanism for generating the early density perturbations that seeded the large-scale structures we see today. Primordial non-Gaussianity is among the most promising of few observational tests of physics at this epoch. At present non-Gaussianity is best constrained by the cosmic microwave background, but in the near term large-scale structure data may be competitive so long as the effects of primordial non-Gaussianity can be modeled through the non-linear process of structure formation. I will discuss recent work modeling effects of a few types of primordial non-Gaussianity on the large-scale halo clustering and the halo mass function. More specifically, I will compare analytic and N-body results for two variants of the curvaton model of inflation: (i) a ``tau_NL" scenario in which the curvaton and inflaton contribute equally to the primordial curvature perturbation and (ii) a ``g_NL'' model where cancellations vanish the usual quadratic f_NL term in the potential, but give rise to a large cubic term.

Primary author

Dr Marilena Loverde (Institute for Advanced Study)

Presentation Materials