現在の位置 : TOPページ談話会案内2015年度 > 第1406回 天文学教室談話会

第1406回 天文学教室談話会

日時

2015年4月6日(月) 15:00

場所

合同C棟N507

講演者

下西 隆(学際研)

題目

Astrochemistry in low metallicity environments probed by infrared and radio observations of the Magellanic Clouds

要旨


Because cosmic metallicity is believed to be increasing in time with the evolution of our universe, interstellar chemistry in low metallicity environments is crucial to understand chemical properties of the past universe. Our Galactic neighbors, the Large and Small Magellanic Clouds, are excellent targets for such studies thanks to their proximity and low metallicity environment. We have been conducting multiwavelength observational studies of molecules in the Magellanic Clouds using various instruments ranging from infrared to radio regions. In this presentation, I am going to discuss characteristics of molecular cloud chemistry in low metallicity environments based on observational data of solid-phase and gas-phase molecules in the Magellanic Clouds. First, I will show infrared spectra of embedded high-mass young stellar objects obtained by AKARI, Spitzer and VLT to discuss chemical compositions of ice mantles in the Magellanic Clouds. Next, I will show (sub-)millimeter spectra of dense molecular clouds obtained by Mopra, ASTE and ALMA to discuss chemical compositions of gas-phase molecules. Finally, I will discuss a possible link between interstellar/circumstellar chemistry and environmental characteristics (particularly metallicity) of the host galaxy based on these observational results and relevant theoretical studies.

ご注意

  • 今後の予定は、都合により、やむを得ず変更される場合がございます。その場合には、このページおよび掲示にておしらせいたしますが、変更の反映まで時間がかかる場合がございます。ご了承ください。
  • 談話会についてのご相談、またはこのPageに関するご意見・ご質問等は下記連絡先までお願いします。
  • 当談話会ではいつでも講演者を募集しております。その際には発表タイトル、連絡先を、二週間前までにお送りくださいますようお願いいたします。

【The Colloquium Committee in 2014】
Shijun Yoshida (yoshida<at>astr.tohoku.ac.jp)
Kimihiro Yamazaki (k.yamazaki<at>astr.tohoku.ac.jp)
Yusuke Okayasu (y.okayasu<at>astr.tohoku.ac.jp)
   <at>-->@

All Rights Reserved. Copyright (c) 2011 Tohoku University Astronomical Institute .