Home > Solar and Space Plasma (SSP) Seminar | その他 > 2020.8.17-8.23

2020.8.17-8.23

8月19日(水) 14:00~15:00  Tea Talk  Zoom  
Aug. 19 Wed. 14:00~15:00  Tea Talk   Zoom 

8月21日(金) 13:30-15:00    Solar and Space Plasma Seminar   Zoom
Aug. 21 Fri. 13:30-15:00   Solar and Space Plasma Seminar  Zoom

詳細は以下をご覧下さい。

8月19日(水)

キャンパス
三鷹 野辺山 水沢 岡山 ハワイ その他
セミナー名
Tea Talk
定例・臨時の別
臨時
日時
8月19日(水曜日) 14:00~15:00
場所
Zoom
講演者
縣 秀彦
所属
天文情報センター
タイトル
ウィズ・コロナ時代の天文教育広報普及―IAU戦略計画2020-2030&「ビッグアイデア」を読み解く―
Astronomy EPO in the With Corona Era-Reading the IAU Strategic Plan 2020-2030 & “Big Ideas in Astronomy”
Abstract
COVID-19感染症拡大に伴って経済規模が縮小するとともに過度な国家主義や個人主義の蔓延が懸念されています。
ウィズ・コロナの時代、なぜ、国際主義やインクルージョンが重要なのでしょうか?本トークでは、21世紀型科学技術の最先端を担うIAUの戦略計画や天文学リテラシー提案からその意味を読み解いていきましょう。
There are concerns about the spread of excessive nationalism and individualism as well as the shrinking size of the economy as the COVID-19 infection spreads. Why is internationalism and inclusion so important in the age of with Corona? In this talk, we will decipher the implications from the IAU strategic plan 2020-2030 and astronomical literacy proposals “Big Ideas in Astronomy”, which are at the forefront of 21st century science and technology.
参考文献:
IAU戦略計画2020-2030(日本語版) https://drive.google.com/file/d/1DwLqjog00EQJHjGrEHuYs98YM986Rtvs/view
Big Ideas in Astronomy(日本語版) https://drive.google.com/file/d/14u3oFpJ7dnb1Vef5w2rCifpcnazPF18U/view

連絡先
名前:藤田登起子
備考
使用する言語 日本語(必要に応じて英語)

8月21日(金)

Campus
Mitaka
Seminar
Solar and Space Plasma Seminar
Regularly Scheduled/Sporadic
Regular
Date and time
21 August (Fri), 13:30-15:00
Place
zoom
Speaker
Masahito Kubo
Affiliation
SSO/NAOJ
Title
Shock waves along recurrent cool jets associated with chromospheric reconnection

Abstract
Chromospheric activities associated with magnetic flux cancellations in emerging active region NOAA 12654 were observed with IRIS, IBIS at the DST, and Hinode on May 2, 2017. IRIS observed the cancellation site with a 4-slit raster mode at a cadence of 12s. Spectro-polarimetric observations of the Ca II 854 nm line were done with IBIS/DST for three hours under good seeing conditions. Hinode/SP repeatedly scanned the same region at 4-minute raster cadence in the Fast map mode. We find that the core intensity of Mg II h & k lines is suddenly blue shifted and then gradually changes to red shift with cool jets ejected from a cancellation site at the center of the active region. Similar behavior is observed in the Ca II 854 nm and Mg II triplet lines, and such phenomena recurrently appear for about 1.5 hours. Two different timescales of the transition from blue shift to red shift are observed. One is of the order of minutes that was observed in Ca II 854 nm, Mg II triplet and Mg II h & k line. It is almost same timescale of the recurrent cool jets observed in Ca II 854 nm images. Another is more frequent transitions on a shorter timescale can be seen only in Mg II h & k line. A signature of magnetic reconnection in the lower atmosphere is also obtained: the intensities of the Ca II 854nm blue wing, AIA 1600A, and IRIS/SJI 140nm are enhanced at the footpoint of the recurrent cool jets. These results suggest that the low frequency transitions from the blue to red shifts are caused by the up and downward motion of the recurrent cool jets due to magnetic reconnection in the lower chromosphere, and the high frequency transitions are related to the shock waves along the cool jets.

Facilitator
Name:Munehito Shoda

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