4月5日（金）16：00～17：00 国立天文台談話会 大セミナー室
Apr 5 Fri NAOJ Seminar Large Seminar Room
4月4日（木）16：00～17：00 国立天文台野辺山談話会 野辺山宇宙電波観測所 本館 輪講室
Apr 4 Thu NRO seminar Seminar Room, Nobeyama
詳細は以下をご覧下さい。
4月5日（金）
- Campus
- Mitaka
- Seminar
- NAOJ seminar
- Regularly Scheduled/Sporadic
- Scheduled
- Date and time
- Friday,Apr.5 16:00-17:00
- Place
- Large Seminar Room
- Speaker
- 谷口 琴美 Kotomi Taniguchi
- Affiliation
- University of Virginia
- Title
- ” Theoretical Studies on Chemical Diversity around Massive Young Stellar Objects”
「大質量原始星周辺の化学的多様性に関する化学反応ネットワークシミュレーション」 - Abstract
- Chemical composition is a powerful tool to investigate the physical conditions and dynamical evolution of star-forming regions. However, relationships between physics and chemistry in high-mass star-forming regions have not been revealed yet. We have carried out radio astronomical observations and found that HC5N, the second shortest cyanopolyyne (HC2n+1N), is abundant around some massive young stellar objects (MYSOs), which was not predicted by classical carbon-chain chemistry. We also suggested chemical diversity around MYSOs. In this talk, I will present recent our chemical simulations of hot-core models with a warm-up period. We find that cyanopolyynes are formed in the lukewarm gas (25 < T 100 K). Moreover, we propose the different warm-up timescale as a possible origin of chemical diversity around MYSOs, based on our simulations. Chemical diversity around MYSOs may reflect a variety of massive star formation process.
- Facilitator
- -Name： Narukage, Noriyuki
4月4日（木）
- Campus
- Nobeyama
- Seminar
- NRO Colloquium
- Regularly Scheduled/Sporadic
- Sporadic
- Date and time
- April 4, 2019 16:00-17:00
- Place
- Seminar room (野辺山宇宙電波観測所 本館 輪講室)
- Speaker
- Iwata Yuhei
- Affiliation
- Keio University
- Title
- High-velocity Molecular Cloud near the Galactic Center
- Abstract
- The central region of our Galaxy contains a huge amount of molecular gas. This region is often referred to as the “central molecular zone (CMZ)”. High-velocity compact cloud (HVCC) is a peculiar population of molecular cloud found in the CMZ of our Galaxy. HVCCs are characterized by their compact sizes and large velocity widths. CO 0.02?0.02 is one of the most energetic HVCCs located at 5′ Galactic east of Sgr A*. This cloud is supposed to be accelerated by a series of supernova explosions because of its morphology and the association of a group of point-like IR sources. In this seminar, I will introduce the recent studies related to CO 0.02?0.02, including the spectral line surveys which have been performed by using the NRO 45-m radio telescope.
- Facilitator
- -Name：Gwanjeong KIM
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