Cosmic acceleration through a new lens: synergies between galaxy surveys and the CMB

by Dr Antón Baleato

Monday Dec 15, 2025, 3:00 PM → 4:00 PM Europe/Madrid

C7b/058 - Seminar (IFAE Main Building C7b)

Two puzzling periods of accelerated expansion are bookend the timeline of our Universe: cosmic inflation in the beginning, and dark energy domination in recent times. New observations from experiments such as DESI and the Simons Observatory are enabling unprcedented insights into both of these epochs. In this talk, I will highlight the critical and cross-cutting role of gravitational lensing in realizing this scientific promise, focusing on recent joint analyses of CMB lensing and galaxy clustering in redshift space, as well as delensing of CMB B-mode polarization. Along the way, I will discuss several enabling methodological developments, including a new understanding of extragalactic CMB foregrounds, fingers-of-god, pixel-free estimators, and more.