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Astrophysics Luncheon Seminar

Intrinsic Alignments: Cosmology from the Large Scales and Constraining the Non-linear Regime
Presented by Elisa Chisari
Princeton University

Monday, November 18, 2013
12:00 noon in 169-336

While intrinsic alignments are usually regarded as a contaminant of cosmic shear measurements, they encode cosmological information and information about the formation history of galaxies. In the first part of the talk, I will discuss the tidal alignment model, which has been shown to reproduce the intrinsic alignments of Luminous Red Galaxies on large scales. I will present prospects of using the intrinsic alignments of Luminous Red Galaxies as a probe of baryon acoustic oscillations and primordial non-gaussianity with ongoing and upcoming surveys. In the second part of the talk, I will focus on the alignment of galaxies in non-linear scales, within clusters of galaxies. I will discuss our ongoing effort to constrain the intrinsic alignment of cluster galaxies in the Sloan Digital Sky Survey "Stripe 82".

JPL Contact: Jason Rhodes (4-3304)

SVCP Astrophysics

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