December 12 Tue 10:00-11:30 太陽系小天体セミナー
Zoom
December 13 Wed 10:30-12:00 SOKENDAI Colloquium
Large Seminar Room in Subaru Building and Zoom (hybrid)
December 13 Wed 15:30-16:30 NAOJ Science Colloquium
Large Seminar Room in Subaru Building and Zoom (hybrid)
詳細は下記からご覧ください。
=============== December 12 Tue ===============
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：12月12日（火曜日）10時00分～11時30分
場所：zoom
講演者：古荘玲子
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
=============== December 13 wed===============
Campus：Mitaka
Seminar：SOKENDAI Colloquium
Regularly Scheduled/Sporadic：Regular
Date and time：December 13, 2023 10:30-12:00
Place：Large Seminar Room in Subaru Building and Zoom
Speaker: Shun Hatano
Affiliation: SOKENDAI 2nd year (M2) (Supervisor: Masami Ouchi, Yusei Koyama, Takashi Moriya)
Title: Supermassive black holes at high redshifts explored with James Webb Space Telescope
Speaker: Shun Ishigami
Affiliation: SOKENDAI 3rd year (D1) (Supervisor: Hirohisa Hara, Yukio Katsukawa, Masahito Kubo)
Title: Estimating the filling factor of coronal loops using EUV spectroscopic data
Facilitator
-Name：Matsuda, Graduate Student Affairs Unit
=============== December 13 wed==============
Campus: Mitaka
Seminar: NAOJ Science Colloquium
Date and time: 2023 Dec. 13 (Wed.), 15:30-16:30
Place: the large seminar room / Zoom (hybrid)
Speaker: Kensuke Kakiuchi
Affiliation: The University of Tokyo
Title: MHD Simulation of The Inner Galaxy with Radiative Cooling and Heating
Abstract:
Magnetic field is supposed to play a key role in the interstellar gas of the Galactic Center region (inner Galactic Bulge region).
Observations show that the strength of the magnetic field within the central few hundred parsecs of the Galaxy is stronger than in the Galactic disk region, and its magnetic energy is comparable poor even surpasses the thermal and kinetic energy of the interstellar gas.
Therefore, it is essential to study the role of the magnetic field to understand the behavior of the interstellar gas in the Galactic center region.
In this talk, we will present the results of 3D global magnetohydrodynamical simulations in the Galactic center region. A notable distinction from previous simulations is the inclusion of radiative cooling and heating effects. We found the formation of a mid-latitude low-plasma beta zone (dominated by magnetic field pressure), which would not have appeared in the model without radiative heating and cooling. While the thermal energy of the interstellar gas is lost because of radiative heating and cooling effects, the magnetic energy is independent of this direct effect and can contribute to the thickness that supports the interstellar gas clouds above the Galactic plane.In fact, it is difficult to explain the thickness of gas clouds in the Galactic center using only gas pressure scale heights, suggesting that the contribution of the magnetic field is important as an interpretation of this thickness.
Facilitator
-Name: Doris Arzoumanian
Comment: English