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J-GLOBAL ID：201301054869916564 Update date: Mar. 19, 2025

YASUHIRO OBA

オオバヤスヒロ | YASUHIRO OBA

Affiliation and department：
Homepage URL (1)： http://www.lowtem.hokudai.ac.jp/astro/oba/index.html

Research field (1)： Space and planetary science

Research theme for competitive and other funds (17)：

2023 - 2025 Searching for "proto-nucleobases" in extraterrestrial materials and the elucidation of their formation mechanism
2021 - 2025 原始地球上での核酸合成に関する新展開:地球外からの材料供給の可能性に迫る
2021 - 2023 On the role of hexamethylenetetramine through the molecular evolution from molecular clouds to the solar system
2021 - 2023 Search for unknown processes on molecular evolution in space: photochemical reactions induced by visible light
2017 - 2022 Chemical evolution on cosmic dust: approach from elementary processes

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Papers (89)：

Germán Molpeceres, Joan Enrique-Romero, Atsuki Ishibashi, Yasuhiro Oba, Hiroshi Hidaka, Thanja Lamberts, Yuri Aikawa, Naoki Watanabe. Hydrogenation of HOCO and formation of interstellar CO2: A not so straightforward relation. Monthly Notices of the Royal Astronomical Society. 2025
G. Molpeceres, T. Nguyen, Y. Oba, N. Watanabe. Hydrogenation of acetaldehyde on interstellar ice analogs results in limited destruction. Astronomy & Astrophysics. 2025
Daniel P. Glavin, Jason P. Dworkin, Conel M.O.D. Alexander, José C. Aponte, Allison A. Baczynski, Jessica J. Barnes, Hans A. Bechtel, Eve L. Berger, Aaron S. Burton, Paola Caselli, et al. Abundant ammonia and nitrogen-rich soluble organic matter in samples from asteroid (101955) Bennu. Nature Astronomy. 2025
Thanh Nguyen, Yasuhiro Oba, W. M. C. Sameera, Kenji Furuya, Naoki Watanabe. Chemical Pathways of SO2 with Hydrogen Atoms on Interstellar Ice Analogues. The Astrophysical Journal. 2024
Atsuki Ishibashi, Germán Molpeceres, Hiroshi Hidaka, Yasuhiro Oba, Thanja Lamberts, Naoki Watanabe. Proposed Importance of HOCO Chemistry: Inefficient Formation of CO2 from CO and OH Reactions on Ice Dust. The Astrophysical Journal. 2024

MISC (13)：

Atsuki Ishibashi, Yasuhiro Oba, Tetsuya Hama, Akira Kouchi, Naoki Watanabe. Inversion of surface voltage on H2O films affecting sublimation of CO underlayer. ABSTRACTS OF PAPERS OF THE AMERICAN CHEMICAL SOCIETY. 2019. 258
香内晃, 木村勇気, 大場康弘, 羽馬哲也, 渡部直樹, 橘省吾, 土山明, 延寿里美, 大坪貴文. アモルファスMg₂SiO₄微粒子を覆った氷の光化学反応によるフォルステライト結晶の生成. 日本地球惑星科学連合大会予稿集(Web). 2019. 2019
Yukiko Yarnall, Hiroshi Hidaka, Yasuhiro Oba, Tetsuya Hama, Akira Kouchi, Naoki Watanabe. Reaction experiments on H exposure of solid methanol at low temperatures. ABSTRACTS OF PAPERS OF THE AMERICAN CHEMICAL SOCIETY. 2018. 255
Piani Laurette, 橘省吾, 羽馬哲也, 菅原いよ, 大場康弘, 田中秀和, 木村勇気, 三宅亮, 松野淳也, 土山明, et al. 低温光化学反応による分子雲での有機物形成・進化. 日本地球惑星科学連合2016年大会. 2016
Osaka K., Oba Y., Kouchi A., Watanabe N. 27aCH-5 H-D substitution of solid ethanol by quantum tunneling at low temperatures. Meeting abstracts of the Physical Society of Japan. 2014. 69. 1. 173-173

Lectures and oral presentations (34)：

Recent advances in analytical techniques for the identification of specific COMs in photochemically-processed interstellar ice analogs
(43rd COSPAR Scientific Assembly 2021)
H2S, why you no solid at 10 K? -Nonthermal desorption from interstellar icy grains
(JPGU 2018 Meeting 2018)
Experimental studies on the surface reaction of hydrogen sulfide with deuterium atoms on amorphous solid water at 10 K
(ACS Spring National Meeting 2018)
Formation of chiral glycine by surface reactions of normal glycine with deuterium atoms at 10 K
(Astrophysical Ices in the Lab (AILab) 2016)
Formation of H2O ice on cold interstellar grains: Reaction kinetics and the structure of ice
(Center for Astrochemical Studies Seminar 2015)

Education (3)：

2004 - 2007 Okayama University The Graduate School of Natural Science and Technology
2002 - 2004 Tokyo Metropolitan University Graduate School of Science
1997 - 2001 University of Tsukuba First Cluster of Colleges,College of Natural Sciences

Professional career (1)：

Work history (6)：

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Awards (3)：

2023/05 - Japan Geoscience Union The 5th Nisida Prize Organic astrochemical evolution in interstellar environment and the solar system
2017/12 - 地球化学研究協会地球化学研究協会学術賞「進歩賞」新しい実験手法による安定同位体比を使用した炭素質隕石中の有機物と模擬星間分子の研究
2010 - 日本有機地球化学会 2010年度日本有機地球化学会研究奨励賞(田口賞)「炭素質隕石中有機化合物の安定同位体組成とその同位体分別プロセスに関する研究

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