Can Voids and Superclusters trace Dark Energy?

Dr. Carlos Hernandez-Monteagudo

Abstract

I revisit the claim of Dark Energy detection after stacking CMB data on the angular position of voids and superclusters in Sloan Data. I examine the theoretically expected amplitude for the ISW-induced signal and explore its scale dependence. I next confront these predictions with results obtained from real WMAP data, and evaluate the degree of agreement and the possible presence of contaminants. In a more general context, I address the possibility of unveiling the signature of Dark Energy on the CMB by looking at isolated regions on the sky hosting high-threshold projected under/over-densities: this constitutes a novel approach since it is less sensitive to large angle systematics commonly present in large scale structure surveys.

About the talk

Can Voids and Superclusters trace Dark Energy?
Dr. Carlos Hernandez-Monteagudo
Thursday December 1, 2011
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