3月15日13時に第15期公募情報を公開いたしました。
4月1日13時より応募者登録サイトへの登録が可能です。
Information on the 15th call for applications was opened at 13:00 on 15 March.
Applicants can register on the registration website from 1 April at 13:00.
Past Activity of the Central Region in the Milky Way Galaxy with X-ray Observation
A super-massive black hole, Sagittarius A* (A-star), whose mass is 4 million times larger than the Sun, sits on the center of the Milky Way Galaxy including the Sun system. Huge gravity of Sagittarius A* binds dynamics of the Milky Way Galaxy and attracts many stars and gases in the surrounding area. However, it has been a mystery that Sagittarius A* is less active than other super-massive black holes. We have observed the vicinity of Sagittarius A* using an X-ray scientific satellite Suzaku since the launch on 2005. As a result, we discovered molecular clouds emitting intense X-rays 300 hundred light-years apart from Sagittarius A*. From the detailed study, we revealed that the molecular clouds reflected X-rays which Sagittarius A* had emitted 300 hundreds years ago. In the Hakubi seminar, I would like to introduce X-ray observations, and we will discuss the high activity in the central region of the Milky Way Galaxy.