Precision Cosmology with Voids

PATIRI, SANTIAGO

Buenos Aires

Congreso; Gravitation, Astrophysics, and Cosmology II Argentinian-Brazilian Meeting; 2014

Múltiples

In recent years, significant progress has been made in the accuracy of measurements of cosmologicalparameters, thanks mainly to new CMB experiments and large scale galaxy surveys, resulting in a newera for Cosmology known as ?Precision Cosmology?. In order to keep improving results, it is essentialto measure the parameters with different techniques and data.In this presentation I discuss a novel method to constrain cosmological parameters using the largeunderdensities found in the large scale structure of the Universe, the so-called voids. In particular,I show how to constrain the values of Sigma_8 and Omega_m h, and present results obtained using datafrom the Sloan Digital Sky Survey. I also discuss work in progress on constraining other parameterssuch as the equation of state for Dark Energy and non-Gaussianity.