January 30 Tue 10:00-16:40
SOKENDAI Progress Report Defense in the second semester, AY2023
2023年度後期 総研大研究中間レポート発表会
hybrid; 中央棟(北)1階 講義室およびZoom
January 30 Tue 10:00-11:30
太陽系小天体セミナー
Zoom
January 31 Wed 10:00-12:00
SOKENDAI Doctoral Thesis Dissertation review
総研大博士学位論文予備審査会
hybrid; Lecture Room and Zoom
January 31 Wed 10:30-12:00
SOKENDAI Colloquium
hybrid; Large Seminar Room in Subaru Building and Zoom
January 31 Wed 15:30-16:30
NAOJ Science Colloquium
hybrid; the 3F seminar room in Instrument Development Building No.3 and Zoom
February 1 Thu 14:00-15:00
Tea Talk
Zoom
詳細は下記からご覧ください。
=============== January 30 Tue ===============
キャンパス：三鷹
セミナー名：2023年度後期 総研大研究中間レポート発表会
(SOKENDAI Progress Report Defense in the second semester, AY2023)
定例・臨時の別：臨時
日時：2023年1月30日（火） 10:00～16:40
場所：中央棟(北)1階 講義室およびZoom
講演者：柿元 拓実（10:00～）(Takumi Kakimoto)
所属：総研大 天文科学専攻 (the Department of Astronomical Science, SOKENDAI)
タイトル：The formation history of a massive quiescent galaxy in a group environment at z = 4.53
講演者：中野 すずか（10:50～）(Suzuka Nakano)
所属：総研大 天文科学専攻 (the Department of Astronomical Science, SOKENDAI)
タイトル：塵に埋もれた活動的な超巨大ブラックホールの発掘を可能とするサブミリ波帯熱源診断法の開発
講演者：渡辺 くりあ（13:00～)（Kuria Watanabe）
所属：総研大 天文科学専攻 (the Department of Astronomical Science, SOKENDAI)
タイトル：Uncovering the Physical Origin of Elemental Abundances in Early Galaxies Formation through Observations and Modeling
講演者：波多野 駿（13:50～）（Shun Hatano）
所属：総研大 天文科学専攻 (the Department of Astronomical Science, SOKENDAI)
タイトル：Exploring for Intermediate Mass Black Holes with Optical Spectra and Near-infrared Luminosity Variability Data.
講演者：内藤 由浩（15:00～）（Yoshihiro Naito）
所属：総研大 天文科学専攻 (the Department of Astronomical Science, SOKENDAI)
タイトル：Spectroscopic study of Alfvén waves in coronal holes as an energy source for the fast solar wind acceleration
講演者：佐藤 慶暉（15:50～）（Yoshiaki Sato）
所属：総研大 天文科学専攻 (the Department of Astronomical Science, SOKENDAI)
タイトル：Study of Electron Acceleration in Solar Flares with X-ray Focusing-Imaging Spectroscopy and Test-Particle Simulation
世話人の連絡先
-名前：大学院係 松田
=============== January 30 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：1月30日（火曜日）10時00分～11時30分
場所：zoom
講演者：紅山仁
所属：東京大学
タイトル：地球接近小惑星の観測計画2024
Abstract：発表者が2024年に実施する二件の地球接近小惑星の観測計画について発表します。多くの方々のコメントを歓迎いたします。
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
=============== January 31 Wed===============
Campus：Mitaka
Seminar：SOKENDAI Doctoral Thesis Dissertation review 総研大博士学位論文予備審査会
Regularly Scheduled/Sporadic：Sporadic
Date and time：January 31, 2024 10:00-12:00
Place ：Lecture Room and Zoom
Speaker：Yui Kasagi
Title：Unveiling Atmospheric Features of Faint Substellar Companions from High-Resolution Near-Infrared Spectra
Facilitator
-Name：Nozomu Tominaga, Hideyuki Kobayashi, Kaya Kitabayashi (Graduate Student Affairs Unit)
Comment:
https://guas-astronomy.jp/CampusLife/doctor_report.html
=============== January 31 Wed==============
Campus：Mitaka
Seminar：SOKENDAI Colloquium
Regularly Scheduled/Sporadic：Regular
Date and time：January 31, 2024 10:30-12:00
Place：Large Seminar Room in Subaru Building and Zoom
Speaker: Shubham Bhardwaj
Affiliation: SOKENDAI 4th year (D2) (Supervisor: Maria Dainotti, Nozomu Tominaga, Kazunari Iwasaki)
Title: GRB Redshift Estimation Using Machine Learning
Facilitator
-Name：Matsuda, Graduate Student Affairs Unit
=============== January 31 Wed==============
Campus: Mitaka
Seminar: NAOJ Science Colloquium
Date and time: 2023 Jan. 31 (Wed.), 15:30-16:30
Place: the 3F seminar room in Instrument Development Building No.3 / Zoom (hybrid)
Speaker: Shun Hatano
Affiliation: NAOJ (M2)
Title: Origin of high-ionization lines found in extremely metal poor galaxies.
Abstract:
The extreme metal poor galaxies (EMPG) exhibit intense high-ionization emission lines, such as He II4686, unexplained by stellar synthesis models. Umeda et al. (2022) employed CLOUDY and MCMC to reproduce the observed spectrum, revealing an unidentified non-thermal radiation source. In this study, we introduce [Ne V]3426 emission (97.1 eV) and estimate spectral indices and luminosities for EMPGs in the 54.4-97.1 eV range. Confirming that non-thermal radiation dominates the 54.4-97.1 eV range for all the galaxies with [Ne V]3426 detections, we discuss the origin of the non-thermal radiation.
Speaker: Ryota Hatami
Affiliation: NAOJ (M1)
Title: Synthesis of Sc, Ti, and V in core-collapse supernovae
Abstract:
A supernova explosion is an explosive phenomenon that occurs at the end of the life of a massive star. However, the explosion mechanism has not yet been clarified. As a clue to investigate the explosion mechanism, we focused on nucleosynthesis. Metal-poor stars reflect the result of explosive nucleosynthesis in supernova explosions of first stars, and reproducing the chemical abundances of metal-poor stars is one of the important issues in the nucleosynthetic calculation. Recently correlations among Sc, Ti, and V are observationally identified.
Nevertheless, the abundances of Sc, Ti, and V in metal-poor stars have not been reproduced by nucleosynthesis calculations based on the results of hydrodynamical simulation. This is because one of the possible causes is that the explosion mechanism is not yet understood. Then, we attempted to constrain the explosion mechanism by (1) performing nucleosynthesis calculations with setting temperature, density, neutrino flux, etc. as parameters to find physical conditions which reproduce the observed chemical composition of metal-poor stars, and (2) examining the feasibility of these conditions by comparing them with 2D explosion simulations. In this talk, the progress of (1) and (2) will be discussed.
Facilitator
-Name: Masamitsu Mori
Comment: English
=============== February 1 Thu==============
キャンパス：三鷹 野辺山 水沢 岡山 ハワイ
セミナー名：Tea Talk
定例・臨時の別：臨時
日時：2/1（木）14：00～15：00
場所：Zoom
講演者：平松 正顕
所属：天文情報センター周波数資源保護室
タイトル：世界無線通信会議とドバイ4週間の旅
言語：日本語（PPTは英語も併記）
世話人の連絡先：
-名前：藤田登起子
備考：
参加方法：Zoom