タイトル：Can we use weak lensing to directly probe the baryonic content of galaxies?
アブストラクト：To understand galaxy formation and evolution, it is essential to reveal the interplay between baryons and dark matter. Weak lensing measurements are a powerful tool to measure total mass profiles directly. However, weak lensing measurements are typically limited to scales above a few tens of kpc where mass profiles are dominated by the dark matter component. If weak lensing measurement can be pushed to smaller scales, it might be possible to use weak lensing to also directly probe masses due to the baryonic components of galaxies. In this talk, I would like to present several results of my analysis of Hubble Space Telescope (HST) ACS data from the COSMOS field, which brings us to discuss 1) on what small scale we can push weak lensing and 2) the possibility of future surveys to detect weak lensing signal that comes from not only dark matter but stellar mass in galaxies.