The Chemical Environment of the Solar System during its Formation

• Project Area: Next Generation Astrochemistry: Reconstruction of the Science Based on Fundamental Molecular Processes
• Project/Area Number: 20H05846
• Research Category: Grant-in-Aid for Transformative Research Areas (A)
• Allocation Type: Single-year Grants
• Review Section: Transformative Research Areas, Section (II)
• Research Institution: The University of Tokyo
• Principal Investigator: 橘 省吾 東京大学, 大学院理学系研究科(理学部), 教授 (50361564)
• Co-Investigator(Kenkyū-buntansha): 瀧川 晶 東京大学, 大学院理学系研究科(理学部), 准教授 (10750367) ; 奈良岡 浩 九州大学, 理学研究院, 教授 (20198386) ; 薮田 ひかる 広島大学, 先進理工系科学研究科(理), 教授 (30530844) ; 岡崎 隆司 九州大学, 理学研究院, 准教授 (40372750) ; 松本 恵 東北大学, 理学研究科, 助教 (50725455) ; 圦本 尚義 北海道大学, 理学研究院, 教授 (80191485)
• Project Period (FY): 2020-11-19 – 2025-03-31
• Project Status: Granted (Fiscal Year 2022)
• Budget Amount: ¥210,470,000 (Direct Cost: ¥161,900,000、Indirect Cost: ¥48,570,000); Fiscal Year 2022: ¥37,050,000 (Direct Cost: ¥28,500,000、Indirect Cost: ¥8,550,000); Fiscal Year 2021: ¥51,870,000 (Direct Cost: ¥39,900,000、Indirect Cost: ¥11,970,000); Fiscal Year 2020: ¥52,910,000 (Direct Cost: ¥40,700,000、Indirect Cost: ¥12,210,000)
• Keywords: 太陽系 / 原始惑星系円盤 / 地球外有機物 / リュウグウ / 再現実験

Outline of Research at the Start

地球外有機物の精密分析と再現実験により，太陽系形成時の初期化学状態を解明する．隕石，惑星間塵，「はやぶさ2」が持ち帰るC型小惑星リュウグウ試料中の有機物の総合分析をおこない，元素・同位体組成，分子構造などを決定する．これらの有機物は太陽系形成時につくられた後，原始太陽系円盤や小天体で変質し，現在の状態になっている．共存鉱物から，有機物が経験した変質過程を推定し，変質前の太陽系最初期有機物の化学状態を制約する．光化学反応有機物形成実験，および有機物やケイ酸塩の変質実験をおこない，太陽系最初期有機物ならびにその形成と変化を再現する条件を明らかにする．

Outline of Annual Research Achievements

太陽系も他の惑星系と同様，原始太陽の周囲に原始太陽系円盤がつくられることで誕生した．原始太陽系円盤も，電波天文観測で捉えられている惑星系形成領域の多様な化学環境のいずれかを初期状態とし，地球を含む惑星に至るまで進化したと考えられる．分子で観測される惑星系形成領域の化学的多様性に，太陽系の初期状態がどのように位置づけられ，太陽系がその形成時にどのような化学過程を経たのか，を明らかにすることが本課題の目的である．中間温度・中間密度環境で様々な化学反応が起こりうる惑星系形成領域での多様な化学を理解するためには，観測や分析の結果のみから推定するのではなく，原子・分子レベルでの素過程に立ち戻り，新たな学理を構築する必要がある．本領域で物理・化学分野との協働で進める素過程の解明に基づき，惑星系形成領域の化学的多様性を理解し，太陽系の初期化学状態をその中に位置づけることを目的とする．当該年度は小惑星探査機「はやぶさ2」が持ち帰った近地球C型小惑星リュウグウ試料の初期分析をおこない，無機化学（元素，同位体）・鉱物学・岩石学・有機化学（固体有機物，可溶性有機分子）の観点から，その詳細を明らかにし，既存の隕石との比較をおこなった．また，リュウグウに存在する鉱物のひとつである炭酸塩の真空分解実験をおこない，分解速度をもとにして，リュウグウが近地球側小惑星として経験した最も太陽に近い軌道条件の制約をおこなった．

Current Status of Research Progress

2: Research has progressed on the whole more than it was originally planned.

Reason

小惑星リュウグウ試料の分析が順調に進んでいる．

Strategy for Future Research Activity

小惑星リュウグウ試料の分析結果に基づき，小惑星での変成・変質条件の実験も進めている．これらの結果を利用した有機物の再現・変成実験をおこなっていく．

Research Products

• [Int'l Joint Research] クイーンズランド大学(オーストラリア)
• [Int'l Joint Research] 大英博物館/マンチェスター大学/グラスゴー大学(英国)
• [Int'l Joint Research] NASA/アリゾナ大学/ハワイ大学(米国)
• [Int'l Joint Research] マックスプランク研究所/ゲッチンゲン大学/イエナ大学(ドイツ)
• [Int'l Joint Research] パリ大学/地球化学・岩石学研究所/グルノーブル大学(フランス)
• [Int'l Joint Research]
• [Journal Article] Preliminary analysis of the Hayabusa2 samples returned from C-type asteroid Ryugu (2022)
  • Author(s): Yada Toru、Abe Masanao、et al.
  • Journal Title: Nature Astronomy Volume: 6 Pages: 214-220
  • DOI: 10.1038/s41550-021-01550-6
  • Peer Reviewed / Open Access / Int'l Joint Research
• [Journal Article] Three-dimensional microstructure and mineralogy of a cosmic symplectite in the Acfer 094 carbonaceous chondrite: Implication for its origin (2022)
  • Author(s): Matsumoto Megumi、Tsuchiyama Akira、Miyake Akira、Ito Motoo、Matsuno Junya、Uesugi Kentaro、Takeuchi Akihisa、Kodama Yu、Yasutake Masahiro、Vaccaro Epifanio
  • Journal Title: Geochimica et Cosmochimica Acta Volume: 323 Pages: 220-241
  • DOI: 10.1016/j.gca.2022.02.024
  • Peer Reviewed / Int'l Joint Research
• [Journal Article] Olivine Melt Inclusion Constraints on Some Intensive Properties of Subvolcanic Crystal Mushes and Their Evolution through Boundary Layer Fractionation in Northern Japan (2022)
  • Author(s): Brahm R、Zellmer G F、Kuritani T、Sakamoto N、Yurimoto H、Nakagawa M、Sato E
  • Journal Title: Journal of Petrology Volume: 63
  • DOI: 10.1093/petrology/egac016
  • Peer Reviewed
• [Journal Article] Inter- and intra-crystal quartz δ18O homogeneity at Okataina volcano, Aotearoa New Zealand: Implications for rhyolite genesis (2022)
  • Author(s): Sas May、Shane Phil、Kawasaki Noriyuki、Sakamoto Naoya、Zellmer Georg F.、Yurimoto Hisayoshi
  • Journal Title: Journal of Volcanology and Geothermal Research Volume: 421 Pages: 107430-107430
  • DOI: 10.1016/j.jvolgeores.2021.107430
  • Peer Reviewed
• [Journal Article] First compositional analysis of Ryugu samples by the MicrOmega hyperspectral microscope (2021)
  • Author(s): Pilorget C.、Okada T.、Hamm V.、Brunetto R.、Yada T.、Loizeau D.、Riu L.、Usui T.、Moussi-Soffys A.、Hatakeda K.、Nakato A.、Yogata K.、Abe M. et al.
  • Journal Title: Nature Astronomy Volume: 6 Pages: 221-225
  • DOI: 10.1038/s41550-021-01549-z
  • Peer Reviewed / Open Access / Int'l Joint Research
• [Journal Article] Transmission Electron Microscopy Study of the Morphology of Ices Composed of H2O, CO2, and CO on Refractory Grains (2021)
  • Author(s): Kouchi, A., Tsuge, M., Hama, T., Oba, Y., Okuzumi, S., Sirono, S.-. iti ., Momose, M., Nakatani, N., Furuya, K., Shimonishi, T., Yamazaki, T., Hidaka, H., Kimura, Y., Murata, K.-. ichiro ., Fujita, K., Nakatsubo, S., Tachibana, S., & Watanabe, N.
  • Journal Title: The Astrophysical Journal Volume: 918 Pages: 45-45
  • DOI: 10.3847/1538-4357/ac0ae6
  • Peer Reviewed / Open Access
• [Journal Article] Assessing the debris generated by the small carry-on impactor operated from the Hayabusa2 mission (2021)
  • Author(s): Ito Motoo、Takano Yoshinori、Kebukawa Yoko、Ohigashi Takuji、Matsuoka Moe、Kiryu Kento、Uesugi Masayuki、Nakamura Tomoki、Yuzawa Hayato、Yamada Keita、Naraoka Hiroshi、Yada Toru、Abe Masanao、Hayakawa Masahiko、Saiki Takanao、Tachibana Shogo、Hayabusa II Project Team
  • Journal Title: Geochemical Journal Volume: 55 Pages: 223-239
  • DOI: 10.2343/geochemj.2.0632
  • NAID: 130008119463
  • Peer Reviewed / Open Access / Int'l Joint Research
• [Journal Article] Anomalously porous boulders on (162173) Ryugu as primordial materials from its parent body (2021)
  • Author(s): N. Sakatani, S. Tanaka, T. Okada, et al.
  • Journal Title: Nature Astronomy Volume: － Pages: 766-774
  • DOI: 10.1038/s41550-021-01371-7
  • Peer Reviewed / Int'l Joint Research
• [Journal Article] Analytical protocols for Phobos regolith samples returned by the Martian Moons eXploration (MMX) mission (2021)
  • Author(s): Fujiya Wataru、Furukawa Yoshihiro、Sugahara Haruna、Koike Mizuho、Bajo Ken-ichi、Chabot Nancy L.、Miura Yayoi N.、Moynier Frederic、Russell Sara S.、Tachibana Shogo、Takano Yoshinori、Usui Tomohiro、Zolensky Michael E.
  • Journal Title: Earth, Planets and Space Volume: 73 Pages: 120-120
  • DOI: 10.1186/s40623-021-01438-9
  • Peer Reviewed / Open Access / Int'l Joint Research
• [Journal Article] The Hayabusa2 mission: what will we expect from samples from C-type near-Earth asteroid (162173) Ryugu? (2021)
  • Author(s): Tachibana Shogo
  • Journal Title: Sample Return Missions Volume: - Pages: 147-162
  • DOI: 10.1016/b978-0-12-818330-4.00007-0
  • Peer Reviewed
• [Journal Article] Scientific Targets of Tanpopo: Astrobiology Exposure and Micrometeoroid Capture Experiments at the Japanese Experiment Module Exposed Facility of the International Space Station (2021)
  • Author(s): Yamagishi Akihiko、Yokobori Shin-ichi、Kobayashi Kensei、Mita Hajime、Yabuta Hikaru、Tabata Makoto、Higashide Masumi、Yano Hajime
  • Journal Title: Astrobiology Volume: 21 Pages: 1451-1460
  • DOI: 10.1089/ast.2020.2426
  • Peer Reviewed / Open Access / Int'l Joint Research
• [Journal Article] Spectral and Petrographic Properties of Inclusions in Carbonaceous Chondrites and Comparison with In Situ Images from Asteroid Ryugu (2021)
  • Author(s): Otto K. A.、Schr?der S. E.、Scharf H. D.、Greshake A.、Schmitz N.、Trauthan F.、Pieth S.、Stephan K.、Ho T.-M.、Jaumann R.、Koncz A.、Michalik T.、Yabuta H.
  • Journal Title: The Planetary Science Journal Volume: 2 Pages: 188-188
  • DOI: 10.3847/psj/ac034b
  • Peer Reviewed / Open Access / Int'l Joint Research
• [Journal Article] Spectrophotometric Analysis of the Ryugu Rock Seen by MASCOT: Searching for a Carbonaceous Chondrite Analog (2021)
  • Author(s): Schroder Stefan、Otto Katharina、Scharf Hannah、Matz Klaus-Dieter、Schmitz Nicole、Scholten Frank、Mottola Stefano、Trauthan Frank、Koncz Alexander、Michaelis Harald、Jaumann Ralf、Ho Tra-Mi、Yabuta Hikaru、Sugita Seiji
  • Journal Title: The Planetary Science Journal Volume: 2 Pages: 58-58
  • DOI: 10.3847/psj/abbb97
  • Peer Reviewed / Open Access / Int'l Joint Research
• [Journal Article] Analytical development of seamless procedures on cation-exchange chromatography and ion-pair chromatography with high-precision mass spectrometry for short-chain peptides. (2021)
  • Author(s): Takano, Y., Oba, Y., Furota, S., Naraoka, H., Ogawa, N., Blattmann, T. M. and Ohkouchi, N.
  • Journal Title: International Journal of Mass Spectrometry Volume: 462 Pages: 116529-116529
  • DOI: 10.1016/j.ijms.2021.116529
  • Peer Reviewed / Open Access / Int'l Joint Research
• [Journal Article] Extraterrestrial hydroxy amino acids in CM and CR carbonaceous chondrites (2021)
  • Author(s): Koga Toshiki、Parker Eric T.、McLain Hannah L.、Aponte Jos? C.、Elsila Jamie E.、Dworkin Jason P.、Glavin Daniel P.、Naraoka Hiroshi、Sandford Scott
  • Journal Title: Meteoritics and Planetary Science Volume: 56 Pages: 1005-1023
  • DOI: 10.1111/maps.13661
  • Peer Reviewed
• [Journal Article] Anaerobic Microscopic Analysis of Ferrous Saponite and Its Sensitivity to Oxidation by Earth’s Air: Lessons Learned for Analysis of Returned Samples from Mars and Carbonaceous Asteroids (2021)
  • Author(s): Noda Natsumi、Yamashita Shohei、Takahashi Yoshio、Matsumoto Megumi、Enokido Yuma、Amano Kana、Kawai Takahiro、Sakuma Hiroshi、Fukushi Keisuke、Sekine Yasuhito、Nakamura Tomoki
  • Journal Title: Minerals Volume: 11 Pages: 1244-1244
  • DOI: 10.3390/min11111244
  • Peer Reviewed / Open Access
• [Journal Article] Water-susceptible primordial noble gas components in less-altered CR chondrites: A possible link to cometary materials (2021)
  • Author(s): Obase Tomoya、Nakashima Daisuke、Choi Jisu、Enokido Yuma、Matsumoto Megumi、Nakamura Tomoki
  • Journal Title: Geochimica et Cosmochimica Acta Volume: 312 Pages: 75-105
  • DOI: 10.1016/j.gca.2021.08.012
  • Peer Reviewed / Open Access / Int'l Joint Research
• [Journal Article] In-situ FE-SEM observation of the growth behaviors of Fe particles at magmatic temperatures (2021)
  • Author(s): Mayumi Mujin, Michihiko Nakamura, Megumi Matsumoto
  • Journal Title: Journal of Crystal Growth Volume: － Pages: 126043-126043
  • DOI: 10.1016/j.jcrysgro.2021.126043
  • Peer Reviewed / Open Access
• [Journal Article] Condensation of cometary silicate dust using an induction thermal plasma system (2021)
  • Author(s): Kim T. H.、Takigawa A.、Tsuchiyama A.、Matsuno J.、Enju S.、Kawano H.、Komaki H.
  • Journal Title: Astronomy & Astrophysics Volume: 656
  • DOI: 10.1051/0004-6361/202141216
  • Peer Reviewed / Open Access / Int'l Joint Research
• [Journal Article] Structural and chemical modifications of oxides and OH generation by space weathering: Electron microscopic/spectroscopic study of hydrogen-ion-irradiated Al2O3 (2021)
  • Author(s): Igami Yohei、Muto Shunsuke、Takigawa Aki、Ohtsuka Masahiro、Miyake Akira、Suzuki Kohtaku、Yasuda Keisuke、Tsuchiyama Akira
  • Journal Title: Geochimica et Cosmochimica Acta Volume: 315 Pages: 61-72
  • DOI: 10.1016/j.gca.2021.09.031
  • Peer Reviewed
• [Journal Article] Condensation of glass with multimetal nanoparticles : Implications to a formation process of GEMS grains. (2021)
  • Author(s): J. Matsuno, A. Tsuchiyama, T. Watanabe, M. Tanaka, A. Takigawa, S. Enju, C. Koike, H. Chihara, and A. Miyake
  • Journal Title: The Astrophysical Journal Volume: 911:47 Pages: 1-16
  • DOI: 10.3847/1538-4357/abe5a0
  • Peer Reviewed / Open Access / Int'l Joint Research
• [Journal Article] Experimental evidence for hydrogen incorporation into Earth’s core (2021)
  • Author(s): ShohTagawa, NaoyaSakamoto, KeiHirose, ShunpeiYokoo, JohnHernlund3 YasuoOhishi, HisayoshiYurimoto
  • Journal Title: Nature Communications Volume: 12 Pages: 2588-2588
  • DOI: 10.1038/s41467-021-22035-0
  • NAID: 120007034010
  • Peer Reviewed / Open Access / Int'l Joint Research
• [Journal Article] A super‐refractory inclusion containing nonstoichiometric spinel from the CO3.0 chondrite Yamato 81020 (2021)
  • Author(s): Yurimoto Hisayoshi、Rubin Alan E.、Itoh Shoichi、Wasson John T.、Krot Alexander
  • Journal Title: Meteoritics & Planetary Science Volume: 57 Pages: 472-483
  • DOI: 10.1111/maps.13652
  • Peer Reviewed
• [Journal Article] Allocation of Carbon from an Arbuscular Mycorrhizal Fungus, Gigaspora margarita, to Its Gram-Negative and Positive Endobacteria Revealed by High-Resolution Secondary Ion Mass Spectrometry (2021)
  • Author(s): Kuga Yukari、Wu Ting-Di、Sakamoto Naoya、Katsuyama Chie、Yurimoto Hisayoshi
  • Journal Title: Microorganisms Volume: 9 Pages: 2597-2597
  • DOI: 10.3390/microorganisms9122597
  • Peer Reviewed
• [Journal Article] Shallow magmatic processes revealed by cryptic microantecrysts: a case study from the Taupo Volcanic Zone (2021)
  • Author(s): Lormand Charline、Zellmer Georg Florian、Sakamoto Naoya、Ubide Teresa、Kilgour Geoff、Yurimoto Hisayoshi、Palmer Alan、N?meth Karoly、Iizuka Yoshiyuki、Moebis Anja
  • Journal Title: Contrib. Mineral. Petrol. Volume: 176 Pages: 97-97
  • DOI: 10.1007/s00410-021-01857-7
  • Peer Reviewed / Open Access / Int'l Joint Research
• [Journal Article] An experimental study on oxygen isotope exchange reaction between CAI melt and low-pressure water vapor under simulated Solar nebular conditions (2021)
  • Author(s): Yamamoto Daiki、Kawasaki Noriyuki、Tachibana Shogo、Kamibayashi Michiru、Yurimoto Hisayoshi
  • Journal Title: Geochim. Cosmochim. Acta Volume: 314 Pages: 108-120
  • DOI: 10.1016/j.gca.2021.09.016
  • Peer Reviewed / Open Access
• [Journal Article] Effect of Hydrogen Gas Pressure on Calcium?Aluminum-rich Inclusion Formation in the Protosolar Disk: a Laboratory Simulation of Open-system Melt Crystallization (2021)
  • Author(s): Kamibayashi Michiru、Tachibana Shogo、Yamamoto Daiki、Kawasaki Noriyuki、Yurimoto Hisayoshi
  • Journal Title: Astrophys. J. Lett. Volume: 923
  • DOI: 10.3847/2041-8213/ac3c41
  • Peer Reviewed / Open Access
• [Journal Article] Origin of hydrogen isotopic variations in chondritic water and organics (2021)
  • Author(s): Piani Laurette、Marrocchi Yves、Vacher Lionel G.、Yurimoto Hisayoshi、Bizzarro Martin
  • Journal Title: Earth Planet. Sci. Lett. Volume: 567 Pages: 117008-117008
  • DOI: 10.1016/j.epsl.2021.117008
  • Peer Reviewed / Int'l Joint Research
• [Journal Article] Origin of minerals in ?kermanite-rich patch texture and oxygen isotopic evolution of compact Type A Ca-Al-rich inclusions from the Northwest Africa 7865 CV chondrite (2021)
  • Author(s): Suzumura Akimasa、Kawasaki Noriyuki、Seto Yusuke、Yurimoto Hisayoshi、Itoh Shoichi
  • Journal Title: Geochim. Cosmochim. Acta Volume: 303 Pages: 51-65
  • DOI: 10.1016/j.gca.2021.03.030
  • Peer Reviewed / Int'l Joint Research
• [Journal Article] Oxygen and Al‐Mg isotopic constraints on cooling rate and age of partial melting of an Allende Type B CAI, Golfball (2021)
  • Author(s): Kawasaki Noriyuki、Itoh Shoichi、Sakamoto Naoya、Simon Steven B.、Yamamoto Daiki、Yurimoto Hisayoshi、Marrocchi Yves
  • Journal Title: Meteorit. Planet. Sci. Volume: 56 Pages: 1224-1239
  • DOI: 10.1111/maps.13701
  • Peer Reviewed / Int'l Joint Research
• [Journal Article] Hydrogen diffusion mechanism in the mantle deduced from H-D interdiffusion in wadsleyite (2021)
  • Author(s): W. Sun, T. Yoshino, N. Sakamoto, H. Yurimoto
  • Journal Title: Earth Planet. Sci. Lett. Volume: 561 Pages: 116815-116815
  • DOI: 10.1016/j.epsl.2021.116815
  • Peer Reviewed / Int'l Joint Research
• [Journal Article] An effect of variations in relative sensitivity factors on Al-Mg systematics of Ca-Al-rich inclusions in meteorites with secondary ion mass spectrometry (2021)
  • Author(s): Kawasaki Noriyuki、Park Changkun、Wakaki Shigeyuki、Kim Hwayoung、Park Sunyoung、Yoshimura Toshihiro、Nagaishi Kazuya、Kim Hyun Na、Sakamoto Naoya、Yurimoto Hisayoshi
  • Journal Title: GEOCHEMICAL JOURNAL Volume: 55 Pages: 283-287
  • DOI: 10.2343/geochemj.2.0634
  • NAID: 130008119462
• [Presentation] Initial analysis of Hayabusa2 returned samples from asteroid (162173) Ryugu (2022)
  • Author(s): Shogo Tachibana
  • Organizer: OSIRIS-REx Sample Analysis Team Meeting
  • Int'l Joint Research / Invited
• [Presentation] Chemical and Isotopic Characterization of Asteroid Ryugu (2022)
  • Author(s): Yurimoto H., Hayabusa2-Initial-Analysis Chemistry Team, Hayabusa2-Initial-Analysis Core
  • Organizer: Lunar and Planetary Science Conference 2022
  • Int'l Joint Research
• [Presentation] Early History of Ryugu’s Parent Asteroid: Evidence from Return Sample (2022)
  • Author(s): Nakamura T., Matsumoto M.. Amano K.. Enokido Y.. Zolensky M. E. et al.
  • Organizer: Lunar and Planetary Science Conference 2022
  • Int'l Joint Research
• [Presentation] Mineralogy and Space Weathering of Fine Fraction Recovered from Asteroid (162173) Ryugu (2022)
  • Author(s): Noguchi T., Matsumoto T, Miyake A, Igami Y., Haruta M., Takigawa A. et al.
  • Organizer: Lunar and Planetary Science Conference 2022
  • Int'l Joint Research
• [Presentation] Isotopic Compositions of Noble Gases and Nitrogen in the Ryugu Samples Returned by Hayabusa2 (2022)
  • Author(s): Okazaki R., Marty B., Busemann H., Hashizume K., Gilmour J. et al.
  • Organizer: Lunar and Planetary Science Conference 2022
  • Int'l Joint Research
• [Presentation] Macromolecular Organic Matter in C-Type Asteroid Ryugu (2022)
  • Author(s): Yabuta H., Cody G. D., Engrand C., Kebukawa Y., De Gregorio B. et al.
  • Organizer: Lunar and Planetary Science Conference 2022
  • Int'l Joint Research
• [Presentation] Soluble Organic Compounds in Asteroid 162173 Ryugu (2022)
  • Author(s): Naraoka H., Takano Y., Dworkin J. P., Hayabusa2-Initial-Analysis SOM Team, Hayabusa2-Initial-Analysis Core
  • Organizer: Lunar and Planetary Science Conference 2022
  • Int'l Joint Research
• [Presentation] Representative Surface Samples Returned from Near-Earth C-Type Asteroid (162173) Ryugu and Their Initial Analysis (2022)
  • Author(s): Tachibana S., Yurimoto H., Nakamura T., Noguchi T., Okazaki R., Yabuta H., Naraoka H. et al.
  • Organizer: Lunar and Planetary Science Conference 2022
  • Int'l Joint Research
• [Presentation] Mineralogical Analysis of Various Lithologies in Coarse Ryugu Samples Using Transmission Electron Microscopy (2022)
  • Author(s): Matsumoto M., Matsuno J., Tsuchiyama A., Nakamura T., Enokido Y. et al.
  • Organizer: Lunar and Planetary Science Conference 2022
  • Int'l Joint Research
• [Presentation] 「はやぶさ2」 再突入カプセル回収とこれからのサンプル分析 (2021)
  • Author(s): 橘省吾
  • Organizer: JpGU2021
  • Invited
• [Presentation] Hayabusa2 sampling operation at Ryugu and returned regolith samples (2021)
  • Author(s): S. Tachibana
  • Organizer: JpGU2021
  • Int'l Joint Research / Invited
• [Presentation] What do pristine Solar System materials tell us about the origin and early evolution of the Solar System? (2021)
  • Author(s): S. Tachibana
  • Organizer: ACO conference: Chemical processes in Solar-type star forming regions
  • Int'l Joint Research / Invited
• [Presentation] Initial analysis of Hayabusa2 returned samples from asteroid (162173) Ryugu (2021)
  • Author(s): Shogo Tachibana, Hisayoshi Yurimoto, Tomoki Nakamura, Takaaki Noguchi, Ryuji Okazaki, Hikaru Yabuta, Hiroshi Naraoka, Kanako Sakamoto, Sei-ichiro Watanabe, Yuichi Tsuda, and the Hayabusa2 Initial Analysis team
  • Organizer: Hayabusa symposium
  • Int'l Joint Research
• [Presentation] Progress of chemical characterization of asteroid Ryugu samples (2021)
  • Author(s): Yurimoto H., Okazaki R., Yabuta H., Naraoka H., Tachibana S. et al.
  • Organizer: Hayabusa symposium 2021
  • Int'l Joint Research / Invited
• [Presentation] Initial analysis of “stone” size Ryugu samples: current status (2021)
  • Author(s): Nakamura T., Matsumoto M., Yurimoto H., Okazaki R., Yabuta H., Naraoka H., Tachibana S. et al.
  • Organizer: Hayabusa symposium 2021
  • Int'l Joint Research / Invited
• [Presentation] Mineralogy and surface modification of small grains recovered from the asteroid 162173 Ryugu (2021)
  • Author(s): Noguchi T., Takigawa A., Yurimoto H., Okazaki R., Yabuta H., Naraoka H., Tachibana S. et al.
  • Organizer: Hayabusa symposium 2021
  • Int'l Joint Research / Invited
• [Presentation] Initial Analysis of Volatile Components in the Hayabusa2 Samples (2021)
  • Author(s): Okazaki R., Yurimoto H., Yabuta H., Naraoka H., Tachibana S. et al.
  • Organizer: Hayabusa symposium 2021
  • Int'l Joint Research / Invited
• [Presentation] An initial look at the distributions and compositions of organic macromolecules in the asteroid Ryugu samples (2021)
  • Author(s): Yabuta H., Yurimoto H., Okazaki R., Naraoka H., Tachibana S. et al.
  • Organizer: Hayabusa symposium 2021
  • Int'l Joint Research / Invited
• [Presentation] Soluble Organic Matter (SOM) analysis of the Hayabusa2 samples: The first results (2021)
  • Author(s): Naraoka H., Yurimoto H., Okazaki R., Yabuta H., Tachibana S. et al.
  • Organizer: Hayabusa symposium 2021
  • Int'l Joint Research / Invited
• [Presentation] Hayabusa2 returned samples from C-type near-Earth asteroid (162173) Ryugu: Preliminary report of initial analysis (2021)
  • Author(s): Shogo Tachibana, Hisayoshi Yurimoto, Tomoki Nakamura, Takaaki Noguchi, Ryuji Okazaki, Hikaru Yabuta, Hiroshi Naraoka, Kanako Sakamoto, Sei-ichiro Watanabe, Yuichi Tsuda, and the Hayabusa2 Initial Analysis team
  • Organizer: ISM workshop 2021
  • Int'l Joint Research / Invited
• [Presentation] Black pebbles and sand returned from C-type asteroid Ryugu (2021)
  • Author(s): Shogo Tachibana
  • Organizer: MetMeSS 2021
  • Int'l Joint Research / Invited
• [Presentation] 「はやぶさ2」 C 型小惑星リュウグウサンプルリターン (2021)
  • Author(s): 橘省吾
  • Organizer: 理論懇シンポジウム
  • Invited
• [Presentation] 「はやぶさ2」 小惑星リュウグウリターンサンプル初期分析 (2021)
  • Author(s): 橘省吾
  • Organizer: 惑星圏シンポジウム
  • Invited
• [Presentation] 同位体比からみた初期太陽系の水の動態や分布 (2021)
  • Author(s): 圦本尚義
  • Organizer: 惑星圏シンポジウム
  • Invited
• [Remarks] 次世代アストロケミストリー
  • URL: https://www.next-astrochem.com