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東京大学・天文学教育研究センターでは2003年4月から談話会を開いています。
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専門的な研究と教育を目的として開催されています。
一般の方は公開講座・講演会などにご参加いただければ幸いです。
ML: semiadm _at_ ioa.s.u-tokyo.ac.jp
please replace _at_ with @
Language: English
Abstract: The discovery of complex organic molecules (COMs) in solar-type protostars highlights the extensive chemical evolution at the onset of planet formation. These molecules, which are potential precursors to pre-biotic molecules, are also found in comets that contain the most pristine matter in the solar system. In recent years, the increasing detection of COMs by interferometric sub-mm/mm observations, such as ALMA and VLA, suggest a common presence of COMs in the early stage of star formation. However, the formation pathways of COMs and whether most protostars undergo similar chemical evolution remain open questions with incomplete observational constraints. It is thought that COMs form in the ice mantles on dust grains followed by thermal sublimation near protostars, but direct observational constraints are scarce. While ALMA provides sub-100 au resolution, a resolution necessary to resolve sites of planet formation, to characterize gaseous COMs in nearby embedded protostars, measurements of chemical composition in ices had been limited by low-resolution and limited sensitivity spectroscopy until JWST, which can probe ices at a spatial scale comparable to that by ALMA with unprecedented sensitivity. In this talk, I will highlight the frontier of complex chemistry from observations of COMs in both gas- and ice-phase. Particularly, I will discuss the recent JWST results on ice in protostellar environments, especially focusing on the latest results of the CORINOS program. We have found potential signatures of icy COMs in a young embedded protostar. I will also discuss the prospects of a holistic chemical analysis of both ice and gas in the era of JWST and ALMA.
| # | Date | Speaker | Title | Chair |
| 401 | 2023年4月20日(木) | Yao-Lun Yang (RIKEN) | Complex chemistry in the era of JWST and ALMA | 天文センター |
| 402 | 2023年5月26日(木) | 藤田真司 (IoA/UT) | TBA | 天文センター |
詳細はこちら: 令和5(2023)年度談話会
| # | Date | Speaker | Title | Chair |
| 400 | 2023年4月6日(木) | Doug Johnstone (National Research Council Canada) | What the Variability of Embedded Protostars Tells Us about Accretion: Past, Present, and Future | K. Kohno |
