Impact of baryonic feedback on HSC Y1 weak lensing non-Gaussian statistics

Understand

Baryonic feedback is a major systematic in weak lensing cosmology.

• Its most studied effect is the suppression of the lensing power spectrum, a second-order statistic, on small scales.
• Motivated by the growing interest in statistics beyond the second order, we investigate the effect of baryons on lensing non-Gaussian statistics and the resulting biases in the matter clustering amplitude $S_8 = \sigma_8\sqrt{\Omega_m/0.3}$.
• We focus on the Subaru Hyper Suprime-Cam Year 1 (HSC-Y1) data which, with its high source number density, closely resembles those expected from the upcoming Euclid and Rubin LSST.