Cosmology from Cosmic Shear Power Spectra with Hyper Suprime-Cam Year 3 Data

Speaker: Roohi Dalal (Princeton)
Title: Cosmology from Cosmic Shear Power Spectra with Hyper Suprime-Cam Year 3 Data

Abstract:
The Hyper Suprime-Cam (HSC) survey is the deepest Stage III weak lensing experiment, going to ~26 mag with exquisite seeing. The depth and image quality achieved by HSC allow us to probe cosmology using weak lensing upto high redshifts, and the analyses serve as important preparatory studies for the next generation of weak lensing surveys. I will discuss our constraints on cosmological parameters using weak lensing cosmic shear power spectra measured from the Year 3 shear catalog of HSC. The shear catalog, prepared by Li et al. 2022, covers 416 square degrees of the northern sky, with a mean i-band seeing of 0.59 arcsec and an effective galaxy number density of 15 arcmin^-2. With an i-band magnitude limit of 24.5 mag, and four tomographic redshift bins spanning 0.3