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Colloquium のバックアップ(No.3)


理論コロキウム2016

理論コロキウムは原則として毎週水曜日の午後13:30から開催しています。
原則として英語で講演していただきますが、 講師・参加者が日本人だけの場合は日本語に切り替えてくださって結構です。
台内・台外また分野を問わず広く発表者(台外の方には旅費・謝金あり)を募集しています。
お問い合わせは以下のコロキウム係までお願いします(_AT_を@に変更してください)。

  • 滝脇知也 takiwaki.tomoya_AT_nao.ac.jp
  • 守屋 尭 takashi.moriya_AT_nao.ac.jp
  • Kenneth Wong ken.wong ATM nao.ac.jp
  • 高橋 博之 takahashi ATM cfca.jp
  • 平居 悠 yutaka.hirai ATM nao.ac.jp

Schedule & History

2010年度 2011年度 2012年度 2013年度 2014年度 2015年度

DateSpeakerTitlePlace/Timeremarks
4/6all internal membersself-introductionConference room, Cosmos Lodge / 13:30
4/13Tomoya Takiwaki (NAOJ DTA)A Clockwork Supernova: precision numerical experiments and their applicationsConference room, Cosmos Lodge / 13:30
4/20Yuki Tanaka (NAOJ CfCA)Magnetically Driven Wind from Hot Gaseous PlanetsConference room, Cosmos Lodge / 13:30
4/25Kohei Inayoshi (Columbia University)Hyper-Eddington accretion flows onto massive black holesLecture Room/ 13:30
4/27Tetsuo Taki (NAOJ CfCA)TBAConference room, Cosmos Lodge / 13:30
5/11Masahiro Ogihara (NAOJ DTA)TBAConference room, Cosmos Lodge / 13:30
5/18Takashi Moriya(NAOJ DTA)TBALarge seminar room / 13:30
5/25Yukari Ohtani (NAOJ CfCA)TBAConference room, Cosmos Lodge / 13:30
6/1Shogo Tachibana (Hokkaido University)TBAConference room, Cosmos Lodge / 13:30
6/8Alessandro Sonnenfeld(IPMU)TBAConference room, Cosmos Lodge / 13:30
6/15Makoto Takamoto (Tokyo University)TBAConference room, Cosmos Lodge / 13:30

Confirmed speakers

  • 住 貴宏さん(大阪大)

Abstract

4/13 Tomoya Takiwaki (NAOJ DTA) A Clockwork Supernova: precision numerical experiments and their applications
Core-collapse supernovae are flamboyant explosions at death of massive stars. They control the circulation of matter in the universe, and inevitably they affect or are affected by a lot of astrophysical objects, such as supernova remnants, neutron stars, black holes, interplanetary disks and stars. The central engine of the explosion, however, remains in mystery. Elaborate numerical experiments try to uncover that. Stimulated by such precise simulations, phenomenological approaches are recently developed.In this seminar, I introduce the status of the supernova simulations and broaden applications of them.
4/20 Yuki Tanaka (NAOJ CfCA) Magnetically Driven Wind from Hot Gaseous Planets
Several transit observations in the UV band have been suggested that hot Jupiters have high-temperature hydrogen upper atmospheres, and the existence of a large amount of atmospheric escape from the upper atmospheres. For example, a mass-loss rate from the hot Jupiter HD 209458b is estimated to be at least 10^10 g/s. It is thought that heating by the XUV radiation from central stars is the main mechanism to drive the atmospheric escape, but a driving mechanism of atmospheric escape that includes planetary magnetic fields has not been investigated so far. Here I propose a new mechanism in which the atmospheric escape is driven by the dissipation of magnetohydrodynamic (MHD) waves. I performed MHD simulations and show that the dissipation of MHD waves in the upper atmosphere can drive a large amount of atmospheric escape and also can heat up the upper atmosphere. I also discuss parameter dependence of the mass-loss rate and atmospheric structures.
4/25 Kohei Inayoshi (Columbia University) Hyper-Eddington accretion flows onto massive black holes
Abstract
4/27 Tetsuo Taki (NAOJ CfCA) title
Abstract