Sep 7 Tue 10:00～11:30 Solar System Minor Body Seminar zoom
Sep 8 Wed 15:00～16:00 ALMA-J seminar zoom
詳細は以下をご覧下さい
9月7日（火）
キャンパス：三鷹
セミナー名：太陽系小天体セミナー
定例・臨時の別：定例
日時：9月7日（火曜日）10時00分～11時30分
場所：zoom
世話人: 渡部 潤一
備考：テレビ会議またはスカイプによる参加も可
9月8日（水）
Campus: Mitaka
Seminar: ALMA-J seminar
Regularly Scheduled/Sporadic: Every Wednesday Date and Time: 2021 Sept 8 15:00-16:00
Place: Zoom
Speaker：Yu-Ting Wu (NAOJ/ALMA)
Title: Morphology and Kinematics of Double-barred Galaxies
Abstract:
About one-third of barred-galaxies have smaller secondary bars embedded within outer primary bars, and therefore are called double-barred galaxies. The inner bar is expected to drive gas inflow to the nucleus of galaxies to feed supermassive black holes, which in turn affect the evolution of galaxies dramatically due to their feedback. The high occurrence of double-barred galaxies, together with the effects of the inner bar on the redistribution of angular momentum and matter, lead us to believe that double-barred galaxies play an important role in the evolution of the Universe. However, to investigate the inner bars, which have relatively smaller size and shorter dynamical time, the major challenge in simulation and observation is to achieve high resolutions in terms of space, velocity and time. In this talk, I will present what we know so far about double-barred galaxies and show the evolution of double-barred galaxies in our N-body simulations. In addition, I will present the morphology and kinematics of the double-barred galaxy NGC 3504, as seen by ALMA in CO (2-1) emission. Finally, I will describe our on-going pilot project to systematically study CO emission of double-barred galaxies.
Facilitator: Yoshito Shimajiri , Shun Ishii