APEC Seminar (Astronomy - Particle Physics - Experimental Physics - Cosmology)

Speaker: Marchel Schmittfull (IAS, Princeton)
Title: Prospects for CMB lensing-galaxy clustering cross-correlations and modeling biased tracers
Date (JST): Thu, Oct 31, 2019, 13:30 - 14:30
Place: Seminar Room A
Related File: 2391.pdf
Abstract: The lensing convergence measurable with future CMB experiments will be highly correlated with the clustering of galaxies that will be observed by deep imaging surveys such as LSST. I will discuss prospects for using that cross-correlation signal to constrain inflation models (fnl) and the sum of neutrino masses. A key limitation of such large-scale structure analyses is that dark matter halos and the galaxies within them only form at peaks of the dark matter density distribution, which is challenging to model. I will present recent work on this, where we found that a new basis of operators that account for large bulk flows successfully describes simulated halos at the field level over a surprisingly wide range of scales.