Date & Time: 2025/October/9 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.

Title: Discovery of Jet-Bubble-Disk Interaction: Jet Feedback on a Protoplanetary Disk via an Expanding Bubble in WSB 52

Speaker: Masataka Aizawa (Ibaraki University) / 逢澤正嵩 (茨城大学)

Abstract:

While stellar jets and outflows are fueled by accretion from disks, their direct influence on disks remain unexplored. Here we revisit ALMA observations of CO(2-1) line emission for the young stellar object WSB 52. We identify an expanding bubble that interacts with its protoplanetary disk. Given that the disk axis points toward the bubble center and the kinetic energy of the bubble is roughly 10^41 erg, we postulate that stellar jets, aligned with the disk axis, have triggered the bubble. The bubble morphology is consistent with uniform expansion with partial concavity, implying the bubble-disk interaction. Correspondingly, the shape and the velocity field of protoplanetary disk appear to be deformed and exhibit high-velocity components, suggesting strong interactions and mass loss from the disk. The discovery of jet feedback onto the disk via the bubble---which we term the jet-bubble-disk interaction---sheds new light on the dynamical processes governing star and planet formation.

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:44,  Affiliations:15

Participants list:

ASIAA PD Yuya Fukuhara

Hosei P Tomoaki Matsumoto

Ibaraki P Munetake Momose, P Toru Tsuribe, A Masataka Aizawa

Kagoshima AP Hiroko Shinnaga, A Daisuke Takaishi, D3 Miyu Kido

Kindai Masayoshi Kiguchi

Kobe A Yuji Matsumoto

Kyushu PD Jihye Hwang, D2 Shingo Nozaki, D2 Ayumu Shoshi, D1 Itsuki Murakoso, M1 Takehiro Tsugeki 

Musashino Univ. AP Aya Higuchi

Nagoya P Shu-ichiro Inutsuka, AP Hiroshi Kobayashi, PD Kanta Kitajima, D2 Izumi Seno, D2 Riona Yamada, D1 Kenshin Onogawa, M2 Hayato Shimizu, M2 Kota Kobayashi, M2 Shusuke Utsumi, M2 Yuji Miko, M1 Kohsei Nozaki, M1 Kanaho Imata, M1 Yuki Tamaki, M1 Akihito Asai, M1 Taisei Shioya

NDA A Kenji Kurosaki

Osaka B4 Jaeseong Lee, B4 Hiroki Kitagawa

RIKEN PD Yoshihide Yamato

Science Tokyo D2 Shintaro Taira, D2 Ryota Yamamuro, M2 Haruto Oshiro

Tohoku U P Misato Fukagawa

UTokyo P Yuri Aikawa, A Shota Notsu, PD Naoto Harada, PD Ryuta Orihara, D2 Yuto Komichi

次回：2025/November/13 17:00-

連絡世話人：冨永遼佑（東京科学大学） tominaga.r.aa[at]m.titech.ac.jp