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2017.4.3-4.9

4月7日(金)16:00~17:00  国立天文台談話会   大セミナー室
Apr 7 fri           NAOJ Seminar      Large Seminar Room

詳細は以下をご覧下さい。

4月7日(金)

キャンパス
三鷹
セミナー名
国立天文台談話会
定例・臨時の別
定例
日時
4月7日(金) 16:00-17:00
場所
大セミナー室
講演者
Valery Pipin
所属
Russian Academy of Sciences
タイトル
Stellar dynamos: the Sun vs fully convective stars
Abstract
The talk reviews results of the recent and ongoing theoretical works about dynamo models of the large-scale magnetic activity on the Sun and the fully convective stars. I make a detour on the observational results about magnetic activity on the late-type stars. The basic ideas of the mean-field models will be introduced, as well. I discuss results of the mean-field dynamo models for the Sun and some M-dwarfs stars. The discussion concerns similarities and differences of the dynamo processes on the stars. It touches the number of topics? such as, the role of the differential rotation in the dynamo, excitation the non-axisymmetric magnetic field, the magnetic feedback on the global flows and the typical topology of the dynamo generated magnetic field. The topology and strength of the global magnetic field affect the coronal activity. I hope that this discussion can shed some light on the origin of the enhanced coronal and flare activity on the young solar analogs.

連絡先
-名前:久保 雅仁

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