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arxiv: 0809.4704 · v2 · submitted 2008-09-26 · 🌌 astro-ph

CMB Lensing and the WMAP Cold Spot

Sudeep Das , David N. Spergel This is my paper
classification 🌌 astro-ph
keywords eithercoldlargelensingsignalspotwmapable
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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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  1. The CMB Cold Spot under the lens II: Lensing signatures in polarization and cosmic texture footprints

    astro-ph.CO 2025-05 unverdicted novelty 5.0

    Forecasts indicate Simons Observatory could reach 1.5-2.3 sigma sensitivity to sub-10 arcsecond lensing from a cosmic texture using temperature and polarization channels, with polarization boosting signal-to-noise by ...