Date & Time: 2025/November/13 17:00-18:00, Venue: Zoom TV Conference System. This is an informal seminar on the formation of stars and planets. We welcome anyone interested in the subject.
Abstract:
High-resolution optical, infrared, and (sub-)millimeter observations have revealed cavities, rings, and spirals in many protoplanetary disks. In transition disks, a compact inner disk can persist inside the cavity; when it is misaligned with the outer disk, shadows appear on the outer disk. These shadows carry geometric information about both the inner and outer disks, and their positions and widths respond sensitively to the underlying parameters. We present a shadow-based framework that directly infers the three-dimensional geometry of transition disks—with mutually misaligned inner and outer components—from scattered light images. The method uses two key observables: (i) the horizon of the outer scattering surface (the boundary between the visible and hidden sides) and (ii) the shadow boundaries cast by the misaligned inner disk. The shapes of these curves encode the inner disk orientation and its thickness (the maximum aspect ratio) as well as the radial variation of the outer surface height, providing geometric leverage. In this presentation, we apply the method to real data and discuss how the resulting insights can inform future applications.
他、会議報告、速報など、飛び入りも歓迎します。今回もしくは次回以降、話題提供できる方は世話人までメールしていただけましたら幸いです。
Participants:24, Affiliations:12
ASIAA PD Yuya Fukuhara
Chiba P Tomoyuki Hanawa
Kagoshima M2 Shu Ishibashi
Kobe A Yuji Matsumoto
Kyoto A Yuri Fujii
Kyushu D2 Ayumu Shoshi, D1 Mitsuki Omura
Nagoya P Shu-ichiro Inutsuka, D2 Riona Yamada, D2 Izumi Seno, D1 Kenshin Onogawa
NAOJ A Kazunari Iwasaki, PD Tomohiro Yoshida
Princeton PD Nadine Soliman
RIKEN PD Yoshihide Yamato
Science Tokyo PD Ryosuke Tominaga, D2 Ryota Yamamuro, D2 Shintaro Taira, M2 Haruto Oshiro, M2 Shuji Ichikawa, M1 Atsuki Tezawa
UTokyo PD Tetsuo Taki, PD Ryuta Orihara, M1 Shogo Moro
次回：TBD
連絡世話人：冨永遼佑（東京科学大学） tominaga.r.aa[at]m.titech.ac.jp