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Formation and evolution of carbonaceous asteroid Ryugu: Direct evidence from returned samples.
Nakamura, T; Matsumoto, M; Amano, K; Enokido, Y; Zolensky, M E; Mikouchi, T; Genda, H; Tanaka, S; Zolotov, M Y; Kurosawa, K; Wakita, S; Hyodo, R; Nagano, H; Nakashima, D; Takahashi, Y; Fujioka, Y; Kikuiri, M; Kagawa, E; Matsuoka, M; Brearley, A J; Tsuchiyama, A; Uesugi, M; Matsuno, J; Kimura, Y; Sato, M; Milliken, R E; Tatsumi, E; Sugita, S; Hiroi, T; Kitazato, K; Brownlee, D; Joswiak, D J; Takahashi, M; Ninomiya, K; Takahashi, T; Osawa, T; Terada, K; Brenker, F E; Tkalcec, B J; Vincze, L; Brunetto, R; Aléon-Toppani, A; Chan, Q H S; Roskosz, M; Viennet, J-C; Beck, P; Alp, E E; Michikami, T; Nagaashi, Y; Tsuji, T.
Afiliação
  • Nakamura T; Department of Earth Sciences, Tohoku University, Sendai 980-8578, Japan.
  • Matsumoto M; Department of Earth Sciences, Tohoku University, Sendai 980-8578, Japan.
  • Amano K; Department of Earth Sciences, Tohoku University, Sendai 980-8578, Japan.
  • Enokido Y; Department of Earth Sciences, Tohoku University, Sendai 980-8578, Japan.
  • Zolensky ME; NASA Johnson Space Center; Houston, TX 77058, USA.
  • Mikouchi T; The University Museum, The University of Tokyo, Tokyo 113-0033, Japan.
  • Genda H; Earth-Life Science Institute, Tokyo Institute of Technology, Tokyo 152-8550, Japan.
  • Tanaka S; Institute of Space and Astronautical Science, Japan Aerospace Exploration Agency (JAXA), Sagamihara 252-5210, Japan.
  • Zolotov MY; Department of Space and Astronautical Science, The Graduate University for Advanced Studies (SOKENDAI), Hayama 240-0193, Japan.
  • Kurosawa K; School of Earth and Space Exploration, Arizona State University, Tempe, AZ 85287, USA.
  • Wakita S; Planetary Exploration Research Center, Chiba Institute of Technology, Narashino 275-0016, Japan.
  • Hyodo R; Department of Earth, Atmospheric and Planetary Sciences, Massachusetts Institute of Technology, Cambridge, MA 02139, USA.
  • Nagano H; Institute of Space and Astronautical Science, Japan Aerospace Exploration Agency (JAXA), Sagamihara 252-5210, Japan.
  • Nakashima D; Department of Mechanical Systems Engineering, Nagoya University, Nagoya 464-8603, Japan.
  • Takahashi Y; Department of Earth Sciences, Tohoku University, Sendai 980-8578, Japan.
  • Fujioka Y; Department of Earth and Planetary Science, The University of Tokyo, Tokyo 113-0033, Japan.
  • Kikuiri M; Isotope Science Center, The University of Tokyo, Tokyo 113-0032, Japan.
  • Kagawa E; Department of Earth Sciences, Tohoku University, Sendai 980-8578, Japan.
  • Matsuoka M; Department of Earth Sciences, Tohoku University, Sendai 980-8578, Japan.
  • Brearley AJ; Department of Earth Sciences, Tohoku University, Sendai 980-8578, Japan.
  • Tsuchiyama A; Laboratoire d'Etudes Spatiales et d'Instrumentation en Astrophysique (LESIA), Observatoire de Paris, Meudon 92195 France.
  • Uesugi M; Geological Survey of Japan, National Institute of Advanced Industrial Science and Technology (AIST), Tsukuba, 305-8567, Japan.
  • Matsuno J; Department of Earth and Planetary Sciences, University of New Mexico, Albuquerque, NM 87131, USA.
  • Kimura Y; Research Organization of Science and Technology, Ritsumeikan University, Kusatsu 525-8577, Japan.
  • Sato M; 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.
  • Milliken RE; Center for Excellence in Deep Earth Science, CAS, Guangzhou 510640, China.
  • Tatsumi E; Scattering and Imaging Division, Japan Synchrotron Radiation Research Institute, Sayo 679-5198, Japan.
  • Sugita S; Research Organization of Science and Technology, Ritsumeikan University, Kusatsu 525-8577, Japan.
  • Hiroi T; Institute of Low Temperature Science, Hokkaido University, Sapporo 060-0819, Japan.
  • Kitazato K; Department of Earth and Planetary Science, The University of Tokyo, Tokyo 113-0033, Japan.
  • Brownlee D; Department of Earth, Environmental, and Planetary Sciences, Brown University, Providence, RI 02912, USA.
  • Joswiak DJ; Department of Earth and Planetary Science, The University of Tokyo, Tokyo 113-0033, Japan.
  • Takahashi M; Instituto de Astrofísica de Canarias, University of La Laguna, Tenerife 38205, Spain.
  • Ninomiya K; Planetary Exploration Research Center, Chiba Institute of Technology, Narashino 275-0016, Japan.
  • Takahashi T; Department of Earth and Planetary Science, The University of Tokyo, Tokyo 113-0033, Japan.
  • Osawa T; Department of Earth, Environmental, and Planetary Sciences, Brown University, Providence, RI 02912, USA.
  • Terada K; Aizu Research Center for Space Informatics, The University of Aizu, Aizu-Wakamatsu 965-8580, Japan.
  • Brenker FE; Department of Astronomy, University of Washington, Seattle, WA 98195 USA.
  • Tkalcec BJ; Department of Astronomy, University of Washington, Seattle, WA 98195 USA.
  • Vincze L; Department of Earth Sciences, Tohoku University, Sendai 980-8578, Japan.
  • Brunetto R; Institute for Radiation Sciences, Osaka University, Toyonaka 560-0043, Japan.
  • Aléon-Toppani A; Kavli Institute for the Physics and Mathematics of the Universe, The University of Tokyo, Kashiwa 277-8583, Japan.
  • Chan QHS; Department of Physics, The University of Tokyo, Tokyo 113-0033, Japan.
  • Roskosz M; Materials Sciences Research Center, Japan Atomic Energy Agency, Tokai 319-1195, Japan.
  • Viennet JC; Department of Earth and Space Science, Osaka University, Toyonaka 560-0043, Japan.
  • Beck P; Institute of Geoscience, Goethe University, Frankfurt, 60438 Frankfurt am Main, Germany.
  • Alp EE; Institute of Geoscience, Goethe University, Frankfurt, 60438 Frankfurt am Main, Germany.
  • Michikami T; Department of Chemistry, Ghent University, Krijgslaan 281 S12, Ghent, Belgium.
  • Nagaashi Y; Institut d'Astrophysique Spatiale, Université Paris-Saclay, Orsay 91405, France.
  • Tsuji T; Institut d'Astrophysique Spatiale, Université Paris-Saclay, Orsay 91405, France.
Science ; 379(6634): eabn8671, 2023 Feb 24.
Article em En | MEDLINE | ID: mdl-36137011
ABSTRACT
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.
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Texto completo: 1 Coleções: 01-internacional Base de dados: MEDLINE Idioma: En Revista: Science Ano de publicação: 2023 Tipo de documento: Article
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Texto completo: 1 Coleções: 01-internacional Base de dados: MEDLINE Idioma: En Revista: Science Ano de publicação: 2023 Tipo de documento: Article