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The First Detection of the CMB Lensing Power Spectrum with ACT and its implications for Cosmology

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If you have a question about this talk, please contact David Titterington .

I will discuss the first detection of the power spectrum of CMB lensing in temperature maps made by the Atacama Cosmology Telescope. The CMB lensing power spectrum is a direct gravitational probe of dark matter and geometry at redshift ~2. I will demonstrate the power of such CMB lensing measurements by explaining how with our measurements, CMB data alone require the presence of dark energy at above 3-sigma.

This talk is part of the Cavendish Astrophysics Seminars series.

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