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DTSTART:20230101T000000
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DTSTART;TZID=UTC:20230518T160000
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UID:2268-1684425600-1684429200@rpm.physics.lbl.gov
SUMMARY:Speaker: Frank Qu (Cambridge University) - Title: Cosmology from high-precision CMB lensing measurements with the Atacama Cosmology Telescope
DESCRIPTION:This is an In-Person [HYBRID] Event \nDate: MAY 18\, 2023 \nLocation: Sessler Conference Room – 50A-5-5132 \nSPEAKER: Frank Qu (Cambridge University) \nTITLE: Cosmology from high-precision CMB lensing measurements with the Atacama Cosmology Telescope \nABSTRACT: \nThe cosmic microwave background provides a unique backlight for illuminating the growth of structures in our universe. Measuring the arcminute-scale lensing deflections experienced by the CMB photons as they travel to our telescopes enables the mapping of the matter distribution to very high redshifts. This lensing signal provides a clean window for constraining fundamental physics\, such as the sum of neutrino masses\, and enables powerful tests of the standard cosmological model via comparison of high-precision measurements of structure growth at late times with early-time predictions. \n  \nIn this talk\, I will present new CMB lensing measurements derived from data release 6 of the Atacama Cosmology Telescope. Our work provides a state-of-the-art lensing power spectrum measurement and an associated signal-dominated lensing mass map that enable a host of cosmological and astrophysical science goals. I will first discuss the novel methods used to tackle key systematics affecting precision CMB lensing. I will then explore the implications of our measurements for tests of cosmic structure growth and the S8 tension. \nJoin Zoom Meeting\nhttps://lbnl.zoom.us/j/98854322464?pwd=K2tKUm1VZjRlV1J5RHE3cXdHQzRxdz09 \nMeeting ID: 988 5432 2464\nPasscode: 142239
URL:https://rpm.physics.lbl.gov/event/speaker-frank-qu-cambridge-university-title-tba/
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