Home > 国立天文台談話会 | 国立天文台野辺山談話会 > 2019.04.01-04.7

2019.04.01-04.7

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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