演講資訊

摘要：

The detection of a number of exoplanets has opened up a new era in the study of planetary systems. The best tests for planet formation theories require the observations of circumstellar disks at the time that planetary systems form. Coronagraphic/polarimetric imaging at optical and near-infrared wavelengths has been used extensively, revealing structures in disks at the highest angular resolutions for far (~0.1"). This technique has allowed observations of faint scattered light on dust grains from the star via the disk surface. I present recent studies lead by my group based on near-infrared observations using Subaru-HiCIAO. These include studies of vertical structures of the disks (and therefore how we interpret the observed spiral and ring structures); a discovery of possible tidal tails associated with one of the disks; and amazingly complicated circumstellar environments of some very active young stars, which provides a good hint to solve some of the big mysteries for star and planet formation.