宇宙における分子進化：星間雲から原始惑星系へ

• Project Area: Evolution of molecules in space: from interstellar clouds to proto-planetary nebulae
• Project/Area Number: 18H05186
• Research Category: Grant-in-Aid for Scientific Research on Innovative Areas (Research in a proposed research area)
• Allocation Type: Single-year Grants
• Research Institution: Hokkaido University
• Principal Investigator: 香内 晃 北海道大学, 低温科学研究所, 教授 (60161866)
• Co-Investigator(Kenkyū-buntansha): 橘 省吾 東京大学, 大学院理学系研究科(理学部), 教授 (50361564)
• Project Period (FY): 2018-04-01 – 2019-03-31
• Project Status: Completed (Fiscal Year 2018)
• Budget Amount: ¥3,900,000 (Direct Cost: ¥3,000,000、Indirect Cost: ¥900,000); Fiscal Year 2018: ¥3,900,000 (Direct Cost: ¥3,000,000、Indirect Cost: ¥900,000)
• Keywords: 宇宙 / 分子進化 / 星間分子雲 / 原始惑星系円盤 / 氷 / 有機物

Outline of Annual Research Achievements

本領域研究の5年間の融合研究で得られた研究成果を広く学界に周知し，新たな学問融合分野を社会・教育に還元することを目的として, 次の4事業をおこなう：(1) 学術専門誌での特集号の発行，(2) 国内シンポジウムの開催，(3) 学部や大学院での教科書としても利用可能な普及書の出版，(4) 一般向けシンポジウムの開催．
日本地球化学会の国際誌Geochemical Journalに代表者の香内，分担者の橘および海外の関連研究者をゲスト編集者とした特集号(Evolution of molecules in space: From interstellar clouds to protoplanetary nebulae)を刊行した(Vol. 53, No.1, pp.1-90, 2019年１月発行，７編の論文を収録)．特集号に掲載の全論文をオープンアクセスとした．
分担者の橘がコンビナーとなり，2018年5月に開催された日本地球惑星科学連合大会において「宇宙における物質の形成と進化」セッションを開催し，18件の研究が発表された．
本領域研究の推進により得られた成果，ならびに新たに芽生えた宇宙分子進化に関する新たな融合学問領域を社会に周知し，次世代の発掘も目的とし，大学生や大学院生の教科書や副読本としても使える一般向け書籍を出版する計画であった．しかし，出版社との交渉がうまくいかず，北海道大学低温科学研究所が出版している「低温科学」に特集号を2019年度中に出版することとなり，計画班員および公募研究者に原稿の執筆を依頼した．
代表者，分担者，連携者の所属機関などで，一般向け講演会や一般向け体験実習を開催した．具体的には，原始惑星系の観測，はやぶさ，はやぶさ２，彗星などに関する話題や，暗黒星雲（分子雲）での氷の生成や彗星が太陽に近づく時にできるイオンの尾を再現する模擬実験をおこなった．

Research Progress Status

平成30年度が最終年度であるため、記入しない。

Strategy for Future Research Activity

平成30年度が最終年度であるため、記入しない。

Research Products

• [Journal Article] The geomorphology, color, and thermal properties of Ryugu: Implications for parent-body processes (2019)
  • Author(s): Seiji Sugita, R. Honda, T. Morota, S. Kameda, H. Sawada, E. Tatsumi, M. Yamada, C. Honda, Y. Yokota, T. Kouyama, N. Sakatani, K. Ogawa, H. Suzuki, T. Okada, N. Namiki, S. Tanaka, Y. Iijima, K. Yoshioka, M. Hayakawa, Y. Cho, M. Matsuoka, N. Hirata, N. Hirata, H. Miyamoto, Jun Kimura
  • Journal Title: Science Volume: 17 Issue: 6437 Pages: 252-252
  • DOI: 10.1126/science.aaw0422
  • Peer Reviewed / Open Access / Int'l Joint Research
• [Journal Article] Hayabusa2 arrives at the carbonaceous asteroid 162173 Ryugu?A spinning top?shaped rubble pile (2019)
  • Author(s): Watanabe S.、Hirabayashi M.、Hirata N. et al.
  • Journal Title: Science Volume: 364 Issue: 6437 Pages: 268-272
  • DOI: 10.1126/science.aav8032
  • Peer Reviewed / Open Access / Int'l Joint Research
• [Journal Article] Physico-chemical Behavior of Hydrogen Sulfide Induced by Reactions with H and D Atoms on Different Types of Ice Surfaces at Low Temperature (2019)
  • Author(s): Y. Oba, T.Tomaru, A. Kouchi, N. Naoki
  • Journal Title: The Astrophysical Journal Volume: 874 Issue: 2 Pages: 124-124
  • DOI: 10.3847/1538-4357/ab0961
  • Peer Reviewed / Open Access
• [Journal Article] Preface: Evolution of molecules in space: From interstellar clouds to protoplanetary nebulae (2019)
  • Author(s): Kouchi A., Tachibana S., Piani L. ,Orthous-Daunay F.-R. and Naraoka H.
  • Journal Title: GEOCHEMICAL JOURNAL Volume: 53 Issue: 1 Pages: 1-3
  • DOI: 10.2343/geochemj.2.0555
  • NAID: 130007594884
  • ISSN: 0016-7002, 1880-5973
  • Peer Reviewed / Open Access / Int'l Joint Research
• [Journal Article] Molecular and isotopic compositions of nitrogen-containing organic molecules formed during UV-irradiation of simulated interstellar ice (2019)
  • Author(s): Sugahara H. , Takano Y. , Tachibana S. , Sugawara I. , Y. Chikaraishi , Ogawa N. O. , Ohkouchi N., Kouchi A. and Yurimoto H.
  • Journal Title: GEOCHEMICAL JOURNAL Volume: 53 Issue: 1 Pages: 5-20
  • DOI: 10.2343/geochemj.2.0553
  • NAID: 130007594396
  • ISSN: 0016-7002, 1880-5973
  • Peer Reviewed / Open Access / Int'l Joint Research
• [Journal Article] Ultraviolet-photon fingerprints on chondritic large organic molecules (2019)
  • Author(s): Orthous‐Daunay F.‐R., Piani L., Flandinet L., Thissen R., Wolters C., Vuitton V., Poch O., Moynier F., Sugawara I., Naraoka H. and Tachibana S.
  • Journal Title: GEOCHEMICAL JOURNAL Volume: 53 Issue: 1 Pages: 21-32
  • DOI: 10.2343/geochemj.2.0544
  • NAID: 130007591565
  • ISSN: 0016-7002, 1880-5973
  • Peer Reviewed / Open Access / Int'l Joint Research
• [Journal Article] Bulk chemical characteristics of soluble polar organic molecules formed through condensation of formaldehyde: Comparison with soluble organic molecules in Murchison meteorite (2019)
  • Author(s): Yuki Isono, Shogo Tachibana, Hiroshi Naraoka, Francois-Regis Orthous-Daunay, Laurette Piani, Yoko Kebukawa
  • Journal Title: GEOCHEMICAL JOURNAL Volume: 53 Issue: 1 Pages: 41-51
  • DOI: 10.2343/geochemj.2.0551
  • NAID: 130007592011
  • ISSN: 0016-7002, 1880-5973
  • Peer Reviewed / Open Access / Int'l Joint Research
• [Journal Article] Diffusivity and solubility of methane in ice Ih (2019)
  • Author(s): Noguchi M., Tachibana S. and Nagahara H.
  • Journal Title: GEOCHEMICAL JOURNAL Volume: 53 Issue: 1 Pages: 83-89
  • DOI: 10.2343/geochemj.2.0537
  • NAID: 130007595497
  • ISSN: 0016-7002, 1880-5973
  • Peer Reviewed / Open Access
• [Journal Article] Fast diffusion path for water in silica glass (2019)
  • Author(s): Kuroda M., Tachibana S., Sakamoto N. and Yurimoto H.
  • Journal Title: American Mineralogist Volume: 104 Issue: 3 Pages: 385-390
  • DOI: 10.2138/am-2019-6802
  • NAID: 120006803948
  • Peer Reviewed / Open Access
• [Journal Article] Measurements of the Activation Energies for Atomic Hydrogen Diffusion on Pure Solid CO (2018)
  • Author(s): Y.Kimura, M.Tsuge, V.Pirronello, A. Kouchi and N.Watanabe
  • Journal Title: The Astrophysical Journal Letters Volume: 858
  • Peer Reviewed / Open Access / Int'l Joint Research
• [Journal Article] The Ortho-to-para Ratio of Water Molecules Desorbed from Ice Made from Para-water Monomers at 11 K (2018)
  • Author(s): T. Hama , A. Kouchi, and N. Watanabe
  • Journal Title: The Astrophysical Journal Letters Volume: 857 Issue: 2 Pages: L13-L13
  • DOI: 10.3847/2041-8213/aabc0c
  • Peer Reviewed / Open Access
• [Journal Article] Oxygen Isotopic Exchange between Amorphous Silicate and Water Vapor and Its Implications for Oxygen Isotopic Evolution in the Early Solar System (2018)
  • Author(s): Yamamoto Daiki、Kuroda Minami、Tachibana Shogo、Sakamoto Naoya、Yurimoto Hisayoshi
  • Journal Title: The Astrophysical Journal Volume: 865 Issue: 2 Pages: 98-98
  • DOI: 10.3847/1538-4357/aadcee
  • Peer Reviewed / Open Access / Int'l Joint Research
• [Journal Article] Short‐lived radioisotopes in meteorites from Galactic‐scale correlated star formation (2018)
  • Author(s): Fujimoto Y., Kurmholz M. R. and Tachibana S.
  • Journal Title: Monthly Notices of the Royal Astronomical Society Volume: 480 Issue: 3 Pages: 4025-4039
  • DOI: 10.1093/mnras/sty2132
  • Peer Reviewed / Open Access / Int'l Joint Research
• [Journal Article] Water vapor pressure dependence of crystallization kinetics of amorphous forsterite (2018)
  • Author(s): Yamamoto D. and Tachibana S.
  • Journal Title: ACS Earth and Space Chemistry Volume: 2 Issue: 8 Pages: 778-786
  • DOI: 10.1021/acsearthspacechem.8b00047
  • Peer Reviewed / Open Access / Int'l Joint Research
• [Presentation] Hayabusa2 Landing for Sampling (2019)
  • Author(s): Tachibana S.
  • Organizer: Solar System symposium in Sapporo 2019
  • Int'l Joint Research
• [Presentation] Hayabusa2 touch‐and‐go sampling at Ryugu (2019)
  • Author(s): Tachibana S., Sawada H., Okamoto C., Yano H., Okazaki R., Takano Y., Miura Y. N. and Sakamoto K.
  • Organizer: 50th Lunar and Planetary Science Conference
  • Int'l Joint Research
• [Presentation] Hayabusa2：Sampling and Sample Analysis (2018)
  • Author(s): Tachibana S.
  • Organizer: JpGU2018
  • Int'l Joint Research / Invited
• [Presentation] Liquid‐like behavior of UV‐irradiated interstellar ice at low temperatures (2018)
  • Author(s): Tachibana S.
  • Organizer: METEORITES- Understanding the origin of planetodiversity
  • Int'l Joint Research
• [Presentation] Hayabusa2 at Ryugu (2018)
  • Author(s): Tachibana S.
  • Organizer: Reading Terrestrial Planet Evolution in Isotopes and Element Measurements
  • Int'l Joint Research / Invited
• [Presentation] Laboratory experiments on high‐ and low‐temperature processes in the early Solar System (2018)
  • Author(s): Tachibana S.
  • Organizer: Workshop: Experiment and Modeling in Investigation of Extraterrestrial Material. 81st Annual Meeting of the Meteoritical Society
  • Int'l Joint Research / Invited
• [Presentation] Initial analysis plan of JAXA Hayabusa2 returned Ryugu regolith (2018)
  • Author(s): Tachibana S, Yurimoto H., Nakamura T., Noguchi T., Okazaki R., Yabuta H., Naraoka H., and Abe M.
  • Organizer: Geological Society of America Annual Meeting
  • Int'l Joint Research / Invited
• [Presentation] Sampling and Analysis of Ryugu Regolith (2018)
  • Author(s): Tachibana S., Sawada H., Okazaki R., Takano Y., Okamoto C., Yano H., Miura Y., Sakamoto K., Yurimoto H., Nakamura T., Noguchi T., Yabuta H. and Naraoka H.
  • Organizer: AGU Fall Meeting
  • Int'l Joint Research
• [Presentation] Hayabusa2 update (2018)
  • Author(s): Tachibana S.
  • Organizer: OSIRIS‐REx Science Team Meeting 14
  • Int'l Joint Research
• [Remarks] http://www.lowtem.hokudai.ac.jp/astro/index.html