- 【Updated on May 12, 2025】 Integration of CiNii Dissertations and CiNii Books into CiNii Research
- Trial version of CiNii Research Knowledge Graph Search feature is available on CiNii Labs
- 【Updated on June 30, 2025】Suspension and deletion of data provided by Nikkei BP
- Regarding the recording of “Research Data” and “Evidence Data”
Formation and evolution of carbonaceous asteroid Ryugu: Direct evidence from returned samples
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- T. Nakamura
- Department of Earth Sciences, Tohoku University, Sendai 980-8578, Japan.
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- M. Matsumoto
- Department of Earth Sciences, Tohoku University, Sendai 980-8578, Japan.
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- K. Amano
- Department of Earth Sciences, Tohoku University, Sendai 980-8578, Japan.
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- Y. Enokido
- Department of Earth Sciences, Tohoku University, Sendai 980-8578, Japan.
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- M. E. Zolensky
- NASA Johnson Space Center; Houston, TX 77058, USA.
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- T. Mikouchi
- The University Museum, The University of Tokyo, Tokyo 113-0033, Japan.
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- H. Genda
- Earth-Life Science Institute, Tokyo Institute of Technology, Tokyo 152-8550, Japan.
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- S. Tanaka
- Institute of Space and Astronautical Science, Japan Aerospace Exploration Agency (JAXA), Sagamihara 252-5210, Japan.
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- M. Y. Zolotov
- School of Earth and Space Exploration, Arizona State University, Tempe, AZ 85287, USA.
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- K. Kurosawa
- Planetary Exploration Research Center, Chiba Institute of Technology, Narashino 275-0016, Japan.
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- S. Wakita
- Department of Earth, Atmospheric and Planetary Sciences, Massachusetts Institute of Technology, Cambridge, MA 02139, USA.
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- R. Hyodo
- Institute of Space and Astronautical Science, Japan Aerospace Exploration Agency (JAXA), Sagamihara 252-5210, Japan.
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- H. Nagano
- Department of Mechanical Systems Engineering, Nagoya University, Nagoya 464-8603, Japan.
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- D. Nakashima
- Department of Earth Sciences, Tohoku University, Sendai 980-8578, Japan.
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- Y. Takahashi
- Department of Earth and Planetary Science, The University of Tokyo, Tokyo 113-0033, Japan.
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- Y. Fujioka
- Department of Earth Sciences, Tohoku University, Sendai 980-8578, Japan.
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- M. Kikuiri
- Department of Earth Sciences, Tohoku University, Sendai 980-8578, Japan.
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- E. Kagawa
- Department of Earth Sciences, Tohoku University, Sendai 980-8578, Japan.
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- M. Matsuoka
- Laboratoire d’Etudes Spatiales et d’Instrumentation en Astrophysique (LESIA), Observatoire de Paris, Meudon 92195 France.
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- A. J. Brearley
- Department of Earth and Planetary Sciences, University of New Mexico, Albuquerque, NM 87131, USA.
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- A. Tsuchiyama
- Research Organization of Science and Technology, Ritsumeikan University, Kusatsu 525-8577, Japan.
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- M. Uesugi
- Scattering and Imaging Division, Japan Synchrotron Radiation Research Institute, Sayo 679-5198, Japan.
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- J. Matsuno
- Research Organization of Science and Technology, Ritsumeikan University, Kusatsu 525-8577, Japan.
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- Y. Kimura
- Institute of Low Temperature Science, Hokkaido University, Sapporo 060-0819, Japan.
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- M. Sato
- Department of Earth and Planetary Science, The University of Tokyo, Tokyo 113-0033, Japan.
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- R. E. Milliken
- Department of Earth, Environmental, and Planetary Sciences, Brown University, Providence, RI 02912, USA.
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- E. Tatsumi
- Department of Earth and Planetary Science, The University of Tokyo, Tokyo 113-0033, Japan.
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- S. Sugita
- Planetary Exploration Research Center, Chiba Institute of Technology, Narashino 275-0016, Japan.
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- T. Hiroi
- Department of Earth, Environmental, and Planetary Sciences, Brown University, Providence, RI 02912, USA.
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- K. Kitazato
- Aizu Research Center for Space Informatics, The University of Aizu, Aizu-Wakamatsu 965-8580, Japan.
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- D. Brownlee
- Department of Astronomy, University of Washington, Seattle, WA 98195 USA.
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- D. J. Joswiak
- Department of Astronomy, University of Washington, Seattle, WA 98195 USA.
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- M. Takahashi
- Department of Earth Sciences, Tohoku University, Sendai 980-8578, Japan.
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- K. Ninomiya
- Institute for Radiation Sciences, Osaka University, Toyonaka 560-0043, Japan.
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- T. Takahashi
- Kavli Institute for the Physics and Mathematics of the Universe, The University of Tokyo, Kashiwa 277-8583, Japan.
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- T. Osawa
- Materials Sciences Research Center, Japan Atomic Energy Agency, Tokai 319-1195, Japan.
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- K. Terada
- Department of Earth and Space Science, Osaka University, Toyonaka 560-0043, Japan.
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- F. E. Brenker
- Institute of Geoscience, Goethe University, Frankfurt, 60438 Frankfurt am Main, Germany.
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- B. J. Tkalcec
- Institute of Geoscience, Goethe University, Frankfurt, 60438 Frankfurt am Main, Germany.
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- L. Vincze
- Department of Chemistry, Ghent University, Krijgslaan 281 S12, Ghent, Belgium.
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- R. Brunetto
- Institut d’Astrophysique Spatiale, Université Paris-Saclay, Orsay 91405, France.
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- A. Aléon-Toppani
- Institut d’Astrophysique Spatiale, Université Paris-Saclay, Orsay 91405, France.
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- Q. H. S. Chan
- Department of Earth Sciences, Royal Holloway, University of London, Egham TW20 0EX, UK.
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- M. Roskosz
- Institut de Minéralogie, Physique des Matériaux et Cosmochimie, Muséum National d’Histoire Naturelle, Centre national de la recherche scientifique (CNRS), Sorbonne Université, Paris, France.
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- J.-C. Viennet
- Institut de Minéralogie, Physique des Matériaux et Cosmochimie, Muséum National d’Histoire Naturelle, Centre national de la recherche scientifique (CNRS), Sorbonne Université, Paris, France.
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- P. Beck
- Institut de Planétologie et d’Astrophysique de Grenoble, CNRS, Université Grenoble Alpes, 38000 Grenoble, France.
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- E. E. Alp
- Advanced Photon Source, Argonne National Laboratory, Argonne, IL 60439, USA.
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- T. Michikami
- Faculty of Engineering, Kindai University, Higashi-Hiroshima 739-2116, Japan.
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- Y. Nagaashi
- Department of Earth Sciences, Tohoku University, Sendai 980-8578, Japan.
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- T. Tsuji
- Department of Earth Resources Engineering, Kyushu University, Fukuoka 819-0395, Japan.
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- Y. Ino
- Institute of Space and Astronautical Science, Japan Aerospace Exploration Agency (JAXA), Sagamihara 252-5210, Japan.
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- J. Martinez
- NASA Johnson Space Center; Houston, TX 77058, USA.
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- J. Han
- Department of Earth and Atmospheric Sciences, University of Houston, Houston, TX 77204, USA.
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- A. Dolocan
- Texas Materials Institute, The University of Texas at Austin, Austin, TX 78712, USA.
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- R. J. Bodnar
- Department of Geoscience, Virginia Tech, Blacksburg, VA 24061, USA.
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- M. Tanaka
- Materials Analysis Station, National Institute for Materials Science, Tsukuba 305-0047, Japan.
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- H. Yoshida
- Department of Earth and Planetary Science, The University of Tokyo, Tokyo 113-0033, Japan.
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- K. Sugiyama
- Institute for Materials Research, Tohoku University, Sendai 980-8577, Japan.
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- A. J. King
- Department of Earth Science, Natural History Museum, London SW7 5BD, UK.
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- K. Fukushi
- Institute of Nature and Environmental Technology, Kanazawa University, Kanazawa 920-1192, Japan.
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- H. Suga
- Spectroscopy Division, Japan Synchrotron Radiation Research Institute, Sayo 679-5198, Japan.
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- S. Yamashita
- Department of Materials Structure Science, The Graduate University for Advanced Studies (SOKENDAI), Tsukuba, Ibaraki 305-0801, Japan.
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- T. Kawai
- Department of Earth and Planetary Science, The University of Tokyo, Tokyo 113-0033, Japan.
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- K. Inoue
- Institute of Nature and Environmental Technology, Kanazawa University, Kanazawa 920-1192, Japan.
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- A. Nakato
- Institute of Space and Astronautical Science, Japan Aerospace Exploration Agency (JAXA), Sagamihara 252-5210, Japan.
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- T. Noguchi
- Division of Earth and Planetary Sciences, Kyoto University, Kyoto 606-8502, Japan
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- F. Vilas
- Planetary Science Institute, Tucson, AZ 85719, USA.
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- A. R. Hendrix
- Planetary Science Institute, Tucson, AZ 85719, USA.
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- C. Jaramillo-Correa
- The Pennsylvania State University, University Park, PA 16802, USA.
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- D. L. Domingue
- Planetary Science Institute, Tucson, AZ 85719, USA.
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- G. Dominguez
- Department of Physics, California State University, San Marcos, CA 92096, USA.
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- Z. Gainsforth
- Space Sciences Laboratory, University of California, Berkeley, CA 94720, USA.
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- C. Engrand
- Laboratoire de Physique des 2 Infinis Irène Joliot-Curie, Université Paris-Saclay, CNRS, 91405 Orsay, France.
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- J. Duprat
- Institut de Minéralogie, Physique des Matériaux et Cosmochimie, Muséum National d’Histoire Naturelle, Centre national de la recherche scientifique (CNRS), Sorbonne Université, Paris, France.
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- S. S. Russell
- Department of Earth Science, Natural History Museum, London SW7 5BD, UK.
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- E. Bonato
- Institute for Planetary Research, Deutsches Zentrum für Luftund Raumfahrt, Rutherfordstraße 2 12489 Berlin, Germany.
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- C. Ma
- Division of Geological and Planetary Sciences, California Institute of Technology, Pasadena CA 91125, USA.
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- T. Kawamoto
- Department of Geosciences, Shizuoka University, Shizuoka 422-8529, Japan.
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- T. Wada
- Department of Earth Sciences, Tohoku University, Sendai 980-8578, Japan.
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- S. Watanabe
- Institute of Space and Astronautical Science, Japan Aerospace Exploration Agency (JAXA), Sagamihara 252-5210, Japan.
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- R. Endo
- Department of Materials Science and Engineering, Tokyo Institute of Technology, Tokyo 152-8550, Japan.
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- S. Enju
- Graduate School of Science and Engineering, Ehime University, Matsuyama 790-8577, Japan.
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- L. Riu
- European Space Astronomy Centre, 28692 Villanueva de la Cañada, Spain.
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- S. Rubino
- Institut d’Astrophysique Spatiale, Université Paris-Saclay, Orsay 91405, France.
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- P. Tack
- Department of Chemistry, Ghent University, Krijgslaan 281 S12, Ghent, Belgium.
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- S. Takeshita
- High Energy Accelerator Research Organization, Tokai 319-1106, Japan.
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- Y. Takeichi
- Department of Materials Structure Science, The Graduate University for Advanced Studies (SOKENDAI), Tsukuba, Ibaraki 305-0801, Japan.
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- A. Takeuchi
- Scattering and Imaging Division, Japan Synchrotron Radiation Research Institute, Sayo 679-5198, Japan.
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- A. Takigawa
- Department of Earth and Planetary Science, The University of Tokyo, Tokyo 113-0033, Japan.
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- D. Takir
- NASA Johnson Space Center; Houston, TX 77058, USA.
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- T. Tanigaki
- Hitachi, Hatoyama 350-0395, Japan.
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- A. Taniguchi
- Institute for Integrated Radiation and Nuclear Science, Kyoto University, Kumatori 590-0494, Japan.
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- K. Tsukamoto
- Department of Earth Sciences, Tohoku University, Sendai 980-8578, Japan.
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- T. Yagi
- National Metrology Institute of Japan, AIST, Tsukuba 305-8565, Japan.
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- S. Yamada
- Department of Physics, Rikkyo University, Tokyo 171-8501, Japan.
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- K. Yamamoto
- Japan Fine Ceramics Center, Nagoya 456-8587, Japan.
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- Y. Yamashita
- National Metrology Institute of Japan, AIST, Tsukuba 305-8565, Japan.
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- M. Yasutake
- Scattering and Imaging Division, Japan Synchrotron Radiation Research Institute, Sayo 679-5198, Japan.
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- K. Uesugi
- Scattering and Imaging Division, Japan Synchrotron Radiation Research Institute, Sayo 679-5198, Japan.
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- I. Umegaki
- High Energy Accelerator Research Organization, Tokai 319-1106, Japan.
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- I. Chiu
- Institute for Radiation Sciences, Osaka University, Toyonaka 560-0043, Japan.
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- T. Ishizaki
- Institute of Space and Astronautical Science, Japan Aerospace Exploration Agency (JAXA), Sagamihara 252-5210, Japan.
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- S. Okumura
- Division of Earth and Planetary Sciences, Kyoto University, Kyoto 606-8502, Japan
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- E. Palomba
- Istituto di Astrofisica e Planetologia Spaziali, Istituto Nazionale di Astrofisica, Rome 00133, Italy.
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- C. Pilorget
- Institut d’Astrophysique Spatiale, Université Paris-Saclay, Orsay 91405, France.
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- S. M. Potin
- Laboratoire d’Etudes Spatiales et d’Instrumentation en Astrophysique (LESIA), Observatoire de Paris, Meudon 92195 France.
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- A. Alasli
- Department of Mechanical Systems Engineering, Nagoya University, Nagoya 464-8603, Japan.
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- S. Anada
- Japan Fine Ceramics Center, Nagoya 456-8587, Japan.
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- Y. Araki
- Department of Physical Sciences, Ritsumeikan University, Shiga 525-0058, Japan.
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- N. Sakatani
- Institute of Space and Astronautical Science, Japan Aerospace Exploration Agency (JAXA), Sagamihara 252-5210, Japan.
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- C. Schultz
- Department of Earth, Environmental, and Planetary Sciences, Brown University, Providence, RI 02912, USA.
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- O. Sekizawa
- Spectroscopy Division, Japan Synchrotron Radiation Research Institute, Sayo 679-5198, Japan.
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- S. D. Sitzman
- Physical Sciences Laboratory, The Aerospace Corporation, CA 90245, USA.
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- K. Sugiura
- Earth-Life Science Institute, Tokyo Institute of Technology, Tokyo 152-8550, Japan.
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- M. Sun
- Key Laboratory of Mineralogy and Metallogeny, Guangdong Provincial Key Laboratory of Mineral Physics and Materials, Guangzhou Institute of Geochemistry, Chinese Academy of Sciences (CAS), Guangzhou 510640, China.
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- E. Dartois
- Institut des Sciences Moléculaires d’Orsay, Université Paris-Saclay, CNRS, 91405 Orsay, France.
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- E. De Pauw
- Department of Chemistry, Ghent University, Krijgslaan 281 S12, Ghent, Belgium.
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- Z. Dionnet
- Institut d’Astrophysique Spatiale, Université Paris-Saclay, Orsay 91405, France.
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- Z. Djouadi
- Institut d’Astrophysique Spatiale, Université Paris-Saclay, Orsay 91405, France.
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- G. Falkenberg
- Deutsches Elektronen-Synchrotron Photon Science, 22603 Hamburg, Germany.
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- R. Fujita
- Department of Mechanical Systems Engineering, Nagoya University, Nagoya 464-8603, Japan.
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- T. Fukuma
- Nano Life Science Institute, Kanazawa University, Kanazawa 920-1192, Japan.
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- I. R. Gearba
- Texas Materials Institute, The University of Texas at Austin, Austin, TX 78712, USA.
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- K. Hagiya
- Graduate School of Life Science, University of Hyogo, Hyogo 678-1297, Japan.
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- M. Y. Hu
- Advanced Photon Source, Argonne National Laboratory, Argonne, IL 60439, USA.
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- T. Kato
- Japan Fine Ceramics Center, Nagoya 456-8587, Japan.
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- T. Kawamura
- Institut de Physique du Globe de Paris, Université de Paris, Paris 75205, France.
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- M. Kimura
- Department of Materials Structure Science, The Graduate University for Advanced Studies (SOKENDAI), Tsukuba, Ibaraki 305-0801, Japan.
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- M. K. Kubo
- Division of Natural Sciences, International Christian University, Mitaka 181-8585, Japan.
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- F. Langenhorst
- Institute of Geosciences, Friedrich-Schiller-Universität Jena, 07745 Jena, Germany.
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- C. Lantz
- Institut d’Astrophysique Spatiale, Université Paris-Saclay, Orsay 91405, France.
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- B. Lavina
- Center for Advanced Radiation Sources, University of Chicago, Chicago, IL 60637, USA.
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- M. Lindner
- Institute of Geoscience, Goethe University, Frankfurt, 60438 Frankfurt am Main, Germany.
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- J. Zhao
- Advanced Photon Source, Argonne National Laboratory, Argonne, IL 60439, USA.
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- B. Vekemans
- Department of Chemistry, Ghent University, Krijgslaan 281 S12, Ghent, Belgium.
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- D. Baklouti
- Institut d’Astrophysique Spatiale, Université Paris-Saclay, Orsay 91405, France.
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- B. Bazi
- Department of Chemistry, Ghent University, Krijgslaan 281 S12, Ghent, Belgium.
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- F. Borondics
- Optimized Light Source of Intermediate Energy to LURE (SOLEIL) L’Orme des Merisiers, Gif sur Yvette F-91192, France.
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- S. Nagasawa
- Kavli Institute for the Physics and Mathematics of the Universe, The University of Tokyo, Kashiwa 277-8583, Japan.
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- G. Nishiyama
- Department of Earth and Planetary Science, The University of Tokyo, Tokyo 113-0033, Japan.
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- K. Nitta
- Spectroscopy Division, Japan Synchrotron Radiation Research Institute, Sayo 679-5198, Japan.
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- J. Mathurin
- Institut Chimie Physique, Université Paris-Saclay, CNRS, 91405 Orsay, France.
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- T. Matsumoto
- Division of Earth and Planetary Sciences, Kyoto University, Kyoto 606-8502, Japan
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- I. Mitsukawa
- Division of Earth and Planetary Sciences, Kyoto University, Kyoto 606-8502, Japan
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- H. Miura
- Graduate School of Science, Nagoya City University, Nagoya 467-8501, Japan.
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- A. Miyake
- Division of Earth and Planetary Sciences, Kyoto University, Kyoto 606-8502, Japan
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- Y. Miyake
- High Energy Accelerator Research Organization, Tokai 319-1106, Japan.
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- H. Yurimoto
- Department of Natural History Sciences, Hokkaido University, Sapporo 060-0810, Japan.
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- R. Okazaki
- Department of Earth and Planetary Sciences, Kyushu University, Fukuoka 819-0395, Japan.
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- H. Yabuta
- Graduate School of Advanced Science and Engineering, Hiroshima University, Higashi-Hiroshima 739-8526, Japan.
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- H. Naraoka
- Department of Earth and Planetary Sciences, Kyushu University, Fukuoka 819-0395, Japan.
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- K. Sakamoto
- Institute of Space and Astronautical Science, Japan Aerospace Exploration Agency (JAXA), Sagamihara 252-5210, Japan.
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- S. Tachibana
- Institute of Space and Astronautical Science, Japan Aerospace Exploration Agency (JAXA), Sagamihara 252-5210, Japan.
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- H. C. Connolly
- Department of Geology, Rowan University, Glassboro, NJ 08028, USA.
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- D. S. Lauretta
- Lunar and Planetary Laboratory, University of Arizona, Tucson, AZ 85721, USA.
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- M. Yoshitake
- Institute of Space and Astronautical Science, Japan Aerospace Exploration Agency (JAXA), Sagamihara 252-5210, Japan.
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- M. Yoshikawa
- Institute of Space and Astronautical Science, Japan Aerospace Exploration Agency (JAXA), Sagamihara 252-5210, Japan.
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- K. Yoshikawa
- Research and Development Directorate, JAXA, Sagamihara 252-5210, Japan.
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- K. Yoshihara
- Institute of Space and Astronautical Science, Japan Aerospace Exploration Agency (JAXA), Sagamihara 252-5210, Japan.
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- Y. Yokota
- Institute of Space and Astronautical Science, Japan Aerospace Exploration Agency (JAXA), Sagamihara 252-5210, Japan.
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- K. Yogata
- Institute of Space and Astronautical Science, Japan Aerospace Exploration Agency (JAXA), Sagamihara 252-5210, Japan.
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- H. Yano
- Institute of Space and Astronautical Science, Japan Aerospace Exploration Agency (JAXA), Sagamihara 252-5210, Japan.
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- Y. Yamamoto
- Institute of Space and Astronautical Science, Japan Aerospace Exploration Agency (JAXA), Sagamihara 252-5210, Japan.
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- D. Yamamoto
- Institute of Space and Astronautical Science, Japan Aerospace Exploration Agency (JAXA), Sagamihara 252-5210, Japan.
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- M. Yamada
- Planetary Exploration Research Center, Chiba Institute of Technology, Narashino 275-0016, Japan.
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- T. Yamada
- Institute of Space and Astronautical Science, Japan Aerospace Exploration Agency (JAXA), Sagamihara 252-5210, Japan.
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- T. Yada
- Institute of Space and Astronautical Science, Japan Aerospace Exploration Agency (JAXA), Sagamihara 252-5210, Japan.
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- K. Wada
- Planetary Exploration Research Center, Chiba Institute of Technology, Narashino 275-0016, Japan.
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- T. Usui
- Institute of Space and Astronautical Science, Japan Aerospace Exploration Agency (JAXA), Sagamihara 252-5210, Japan.
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- R. Tsukizaki
- Institute of Space and Astronautical Science, Japan Aerospace Exploration Agency (JAXA), Sagamihara 252-5210, Japan.
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- F. Terui
- Department of Mechanical Engineering, Kanagawa Institute of Technology, Atsugi 243-0292, Japan.
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- H. Takeuchi
- Institute of Space and Astronautical Science, Japan Aerospace Exploration Agency (JAXA), Sagamihara 252-5210, Japan.
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- Y. Takei
- Institute of Space and Astronautical Science, Japan Aerospace Exploration Agency (JAXA), Sagamihara 252-5210, Japan.
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- A. Iwamae
- Marine Works Japan, Yokosuka 237-0063, Japan.
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- H. Soejima
- Institute of Space and Astronautical Science, Japan Aerospace Exploration Agency (JAXA), Sagamihara 252-5210, Japan.
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- K. Shirai
- Institute of Space and Astronautical Science, Japan Aerospace Exploration Agency (JAXA), Sagamihara 252-5210, Japan.
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- Y. Shimaki
- Institute of Space and Astronautical Science, Japan Aerospace Exploration Agency (JAXA), Sagamihara 252-5210, Japan.
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- H. Senshu
- Planetary Exploration Research Center, Chiba Institute of Technology, Narashino 275-0016, Japan.
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- H. Sawada
- Institute of Space and Astronautical Science, Japan Aerospace Exploration Agency (JAXA), Sagamihara 252-5210, Japan.
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- T. Saiki
- Institute of Space and Astronautical Science, Japan Aerospace Exploration Agency (JAXA), Sagamihara 252-5210, Japan.
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- M. Ozaki
- Institute of Space and Astronautical Science, Japan Aerospace Exploration Agency (JAXA), Sagamihara 252-5210, Japan.
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- G. Ono
- Research and Development Directorate, JAXA, Sagamihara 252-5210, Japan.
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- T. Okada
- Institute of Space and Astronautical Science, Japan Aerospace Exploration Agency (JAXA), Sagamihara 252-5210, Japan.
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- N. Ogawa
- Institute of Space and Astronautical Science, Japan Aerospace Exploration Agency (JAXA), Sagamihara 252-5210, Japan.
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- K. Ogawa
- Institute of Space and Astronautical Science, Japan Aerospace Exploration Agency (JAXA), Sagamihara 252-5210, Japan.
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- R. Noguchi
- Faculty of Science, Niigata University, Niigata 950-2181, Japan.
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- H. Noda
- National Astronomical Observatory of Japan, Mitaka 181-8588, Japan.
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- M. Nishimura
- Institute of Space and Astronautical Science, Japan Aerospace Exploration Agency (JAXA), Sagamihara 252-5210, Japan.
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- N. Namiki
- Department of Space and Astronautical Science, The Graduate University for Advanced Studies (SOKENDAI), Hayama 240-0193, Japan.
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- S. Nakazawa
- Institute of Space and Astronautical Science, Japan Aerospace Exploration Agency (JAXA), Sagamihara 252-5210, Japan.
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- T. Morota
- Department of Earth and Planetary Science, The University of Tokyo, Tokyo 113-0033, Japan.
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- A. Miyazaki
- Institute of Space and Astronautical Science, Japan Aerospace Exploration Agency (JAXA), Sagamihara 252-5210, Japan.
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- A. Miura
- Institute of Space and Astronautical Science, Japan Aerospace Exploration Agency (JAXA), Sagamihara 252-5210, Japan.
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- Y. Mimasu
- Institute of Space and Astronautical Science, Japan Aerospace Exploration Agency (JAXA), Sagamihara 252-5210, Japan.
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- K. Matsumoto
- Department of Space and Astronautical Science, The Graduate University for Advanced Studies (SOKENDAI), Hayama 240-0193, Japan.
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- K. Kumagai
- Institute of Space and Astronautical Science, Japan Aerospace Exploration Agency (JAXA), Sagamihara 252-5210, Japan.
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- T. Kouyama
- Digital Architecture Research Center, National Institute of Advanced Industrial Science and Technology, Tokyo 135-0064, Japan.
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- S. Kikuchi
- Planetary Exploration Research Center, Chiba Institute of Technology, Narashino 275-0016, Japan.
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- K. Kawahara
- Institute of Space and Astronautical Science, Japan Aerospace Exploration Agency (JAXA), Sagamihara 252-5210, Japan.
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- S. Kameda
- Institute of Space and Astronautical Science, Japan Aerospace Exploration Agency (JAXA), Sagamihara 252-5210, Japan.
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- T. Iwata
- Institute of Space and Astronautical Science, Japan Aerospace Exploration Agency (JAXA), Sagamihara 252-5210, Japan.
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- Y. Ishihara
- JAXA Space Exploration Center, JAXA, Sagamihara 252-5210, Japan.
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- M. Ishiguro
- Department of Physics and Astronomy, Seoul National University, Seoul 08826, Korea.
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- H. Ikeda
- Research and Development Directorate, JAXA, Sagamihara 252-5210, Japan.
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- S. Hosoda
- Institute of Space and Astronautical Science, Japan Aerospace Exploration Agency (JAXA), Sagamihara 252-5210, Japan.
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- R. Honda
- Department of Information Science, Kochi University, Kochi 780-8520, Japan.
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- C. Honda
- Aizu Research Center for Space Informatics, The University of Aizu, Aizu-Wakamatsu 965-8580, Japan.
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- Y. Hitomi
- Institute of Space and Astronautical Science, Japan Aerospace Exploration Agency (JAXA), Sagamihara 252-5210, Japan.
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- N. Hirata
- Department of Planetology, Kobe University, Kobe 657-8501, Japan.
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- T. Hayashi
- Institute of Space and Astronautical Science, Japan Aerospace Exploration Agency (JAXA), Sagamihara 252-5210, Japan.
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- M. Hayakawa
- Institute of Space and Astronautical Science, Japan Aerospace Exploration Agency (JAXA), Sagamihara 252-5210, Japan.
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- K. Hatakeda
- Institute of Space and Astronautical Science, Japan Aerospace Exploration Agency (JAXA), Sagamihara 252-5210, Japan.
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- S. Furuya
- Department of Earth and Planetary Science, The University of Tokyo, Tokyo 113-0033, Japan.
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- R. Fukai
- Institute of Space and Astronautical Science, Japan Aerospace Exploration Agency (JAXA), Sagamihara 252-5210, Japan.
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- A. Fujii
- Institute of Space and Astronautical Science, Japan Aerospace Exploration Agency (JAXA), Sagamihara 252-5210, Japan.
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- Y. Cho
- Department of Earth and Planetary Science, The University of Tokyo, Tokyo 113-0033, Japan.
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- M. Arakawa
- Department of Planetology, Kobe University, Kobe 657-8501, Japan.
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- M. Abe
- Institute of Space and Astronautical Science, Japan Aerospace Exploration Agency (JAXA), Sagamihara 252-5210, Japan.
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- Y. Tsuda
- Institute of Space and Astronautical Science, Japan Aerospace Exploration Agency (JAXA), Sagamihara 252-5210, Japan.
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Description
<jats:p>Samples of the carbonaceous asteroid Ryugu were brought to Earth by the Hayabusa2 spacecraft. We analyzed 17 Ryugu samples measuring 1 to 8 millimeters. Carbon dioxide–bearing water inclusions are present within a pyrrhotite crystal, indicating that Ryugu’s parent asteroid formed in the outer Solar System. The samples contain low abundances of materials that formed at high temperatures, such as chondrules and calcium- and aluminum-rich inclusions. The samples are rich in phyllosilicates and carbonates, which formed through aqueous alteration reactions at low temperature, high pH, and water/rock ratios of <1 (by mass). Less altered fragments contain olivine, pyroxene, amorphous silicates, calcite, and phosphide. Numerical simulations, based on the mineralogical and physical properties of the samples, indicate that Ryugu’s parent body formed ~2 million years after the beginning of Solar System formation.</jats:p>
Journal
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- Science
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Science 379 (6634), eabn8671-, 2023-02-24
American Association for the Advancement of Science (AAAS)