CMB Lensing and the WMAP Cold Spot

Details CMB Lensing and the WMAP Cold Spot CMB Lensing and the WMAP Cold Spot

2008-09-26

arxiv.org/abs/0809.4704v2

Phys.Rev.D79:043007,2009

Astronomy and Astrophysics

Astrophysics

5 pages, 2 figures, a bug in Fig.2 fixed

Scientific paper

10.1103/PhysRevD.79.043007

Cosmologists have suggested a number of intriguing hypotheses for the origin of the "WMAP cold spot", the coldest extended region seen in the 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 ACT and SPT should be able to detect the signatures of either textures or large voids. If either signal is detected, it would have profound implications for cosmology.

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