Multi-tracer cosmology at high redshift using galaxies and lensing

Apr 22, 2024 - 11:00 am to 12:00 pm

Campus, Varian 355

Haruki Ebina (UC Berkeley) In Person and zoom

Zoom info:

Near-future facilities observing the high-redshift universe (2<z<5) will have an opportunity to take advantage of multi-tracer cosmology by observing multiple tracers of the matter density field: Lyman alpha emitters (LAE), Lyman break galaxies (LBG), and CMB lensing. Using Fisher forecasts, I will show the benefits of multi-tracer for these facilities, highlighting the degeneracy breaking that sources the constraint improvements along the way. The forecast includes a preliminary approach towards modelling the impact of radiative transfer (RT) on constraints involving LAEs by introducing a simplified model at linear theory level. I will discuss how multi-tracers will be able to limit RT effects at the level of this model.