Cosmology at redshifts 50 and 1100

Apr 29, 2024 - 11:00 am to 12:00 pm

Campus, Varian 355

Zack Li (UC Berkeley) In Person and zoom

Zoom info:

At high redshift, we can cleanly separate physics from astrophysics. Things were simpler back then! I'll discuss two upcoming experiments that chase those good old days before star formation changed everything.

LuSEE-Night is a pathfinder 21 cm experiment with four monopoles headed to the lunar farside in 2026, seeking the redshifted 21 cm line from the Dark Ages. In a similar timeframe, the Simons Observatory will make incredibly precise maps of the Cosmic Microwave Background from the Atacama Desert. I'll discuss the status of these experiments and the challenges they face in uncovering new physics.