APR 19 Tue 10:00～11:30 太陽系小天体セミナー / Solar System Minor Body Seminar zoom
APR 20 Wed 10:30～12:00 SOKENDAI Colloquium zoom
APR 20 Wed 15:30～17:00 NAOJ Science Colloquium zoom
詳細は以下をご覧下さい
4月19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：4月19日（火曜日）10時00分～11時30分
場所：zoom
講演者：西田信幸
世話人の連絡先
名前：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
4月20日（水）
Campus：Mitaka
Seminar：SOKENDAI Colloquium
Regularly Scheduled/Sporadic：Regular
Date and time：April 20th, 2022 10:30-12:00
Speaker 1：Yui Kasagi
Affiliation：SOKENDAI 4th year (D2) (Supervisor: Takayuki Kotani, Saeko Hayashi, Wako Aoki)
Title：Observation of Brown Dwarfs with IRD and REACH and Analysis of High-dispersion Spectra
Speaker 2：Shunsuke Sasaki
Affiliation：SOKENDAI 3rd year (D1) (Supervisor: Tomoya Takiwaki, Mami Machida, Takashi Moriya)
Title：Progenitor dependence of core collapse supernovae
Facilitator
-Name：Matsuda, Graduate Student Affairs Unit
4月20日（水）
Campus：Mitaka
Seminar：NAOJ Science Colloquium
Regularly Scheduled/Sporadic：Every Wednesday
Date and time：2021 April 20, 15:30-17:00
Place：zoom / Instrument Development Bldg. 3 (hybrid)
Speaker：Yuhei Iwata
Affiliation：NAOJ
Title：Evolution and Activities of the Galactic Nucleus Sgr A*
Abstract：The nucleus of our Galaxy, Sgr A, is one of the most convincing candidates for a supermassive black hole (SMBH). It shows short timescale variations of a few tens of minutes, which are suggested to be related to orbital motions in the vicinity of the SMBH. However, the truth and cause of these variations have remained controversial. Also, as for the formation process of SMBHs, a merger scenario between intermediate-mass black holes (IMBHs) has been proposed, but there are very few promising candidates for IMBHs, and it is insufficient to support this scenario. I have been researching time variations of Sgr A in the mm/submm band and peculiar molecular clouds in the Galactic center having broad velocity widths to which IMBHs may be associated. I will introduce the short-timescale variability of Sgr A* obtained with ALMA and the latest observational results of the high-velocity compact clouds.
Facilitator
-Name：Akimasa Kataoka
Comment：English