![School of Natural Sciences Event](/sites/default/files/styles/two_column_medium/public/2019-09/sns_default.jpg?itok=IEu1CLXj)
Rutgers University Astrophysics Seminar
New precision cosmological constraints from CMB lensing with the Atacama Cosmology Telescope
The Atacama Cosmology Telescope is a ground-based CMB survey that has mapped half the millimeter sky at significantly higher resolution and sensitivity than the Planck satellite. I will present new ACT results from a 9400 sq.deg. gravitational lensing mass map, including constraints on the amplitude of matter fluctuations as well as the Hubble constant at better than 2%, as well as bounds on the sum of neutrino masses and curvature density. With a consistent re-analysis of galaxy weak lensing from the DES, HSC and KiDS surveys, I will discuss these results in the context of the S8 tension. With an ACT lensing-informed measurement of the Hubble constant independent of the sound horizon, I will discuss implications for the Hubble tension.
Date & Time
April 27, 2023 | 2:00pm – 3:00pm
Location
Serin Hall Rm W330, Rutgers and ZoomSpeakers
Mathew Madhavacheril
Affiliation
University of Pennsylvania