Constraining Cosmic Topology with CMB Polarization - IN2P3 - Institut national de physique nucléaire et de physique des particules Access content directly
Preprints, Working Papers, ... Year : 2006

Constraining Cosmic Topology with CMB Polarization

Abstract

Multiply connected space sections of the universe on a scale smaller than the horizon size can leave an imprint on cosmic microwave background polarization maps, in such a way that the so-called ''circles-in-the-sky'' method can be used to detect or constrain the topology. We investigate some specific cases, namely toroidal and sixth-turn spaces, in order to show the influence of topology on CMB polarization. The correlation between matched points happens to be always positive and higher than 75% regardless of the angular scale and of the cosmological parameters, except for reionization. This figure is better than what occurs in temperature maps, but is achieved only in the absence of noise. It is only slightly reduced by the filtering scheme.

Dates and versions

in2p3-00183307 , version 1 (29-10-2007)

Identifiers

Cite

Alain Riazuelo, Samuel Caillerie, M. Lachièze-Rey, Roland Lehoucq, Jean-Pierre Luminet. Constraining Cosmic Topology with CMB Polarization. 2007. ⟨in2p3-00183307⟩
22 View
0 Download

Altmetric

Share

Gmail Mastodon Facebook X LinkedIn More