CMB lensing and the WMAP cold spot

International audience Cosmologists have suggested a number of intriguing hypotheses for the origin of the ``WMAP cold spot,'' the coldest extended region seen in the cosmic microwave background (CMB) sky, including a very large void and a collapsing texture. Either hypothesis predicts a d...

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Bibliographic Details
Published in:Physical Review D
Main Authors: Das, Sudeep, Spergel, David N.
Other Authors: Princeton University, AstroParticule et Cosmologie (APC (UMR_7164)), Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Observatoire de Paris, Université Paris sciences et lettres (PSL)-Université Paris sciences et lettres (PSL)-Université Paris Diderot - Paris 7 (UPD7)-Centre National de la Recherche Scientifique (CNRS)
Format: Article in Journal/Newspaper
Language:English
Published: HAL CCSD 2009
Subjects:
[PHYS.ASTR]Physics [physics]/Astrophysics [astro-ph]
South Pole
South pole
Online Access:https://hal.science/hal-03732918
https://doi.org/10.1103/PhysRevD.79.043007
Description
Summary:International audience Cosmologists have suggested a number of intriguing hypotheses for the origin of the ``WMAP cold spot,'' the coldest extended region seen in the cosmic microwave background (CMB) sky, including a very large void and a collapsing texture. Either hypothesis predicts a distinctive CMB lensing signal. We show that the upcoming generation of high resolution CMB experiments such as Atacama Cosmology Telescope and the South Pole Telescope should be able to detect the signatures of either textures or large voids. If either signal is detected, it will have profound implications for cosmology.

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