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 about 67 percent.
The WMAP cold spot
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abstract
The WMAP cold spot was found by applying spherical wavelets to the first year WMAP data. An excess of kurtosis of the wavelet coefficient was observed at angular scales of around 5 degrees. This excess was shown to be inconsistent with Gaussian simulations with a p-value of around 1%. A cold spot centered at (b = -57, l = 209) was shown to be the main cause of this deviation. Several hypotheses were raised to explain the origin of the cold spot. After performing a Bayesian template fit a collapsing cosmic texture was found to be the most probable hypothesis explaining the spot. Here we review the properties of the cold spot and the possible explanations.
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astro-ph.CO 1years
2025 1verdicts
UNVERDICTED 1representative citing papers
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The CMB Cold Spot under the lens II: Lensing signatures in polarization and cosmic texture footprints
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 about 67 percent.