Communications Earth & Environment (Sep 2023)
Space weathering acts strongly on the uppermost surface of Ryugu
- Moe Matsuoka,
- Ei-ichi Kagawa,
- Kana Amano,
- Tomoki Nakamura,
- Eri Tatsumi,
- Takahito Osawa,
- Takahiro Hiroi,
- Ralph Milliken,
- Deborah Domingue,
- Driss Takir,
- Rosario Brunetto,
- Antonella Barucci,
- Kohei Kitazato,
- Seiji Sugita,
- Yuri Fujioka,
- Osamu Sasaki,
- Shiho Kobayashi,
- Takahiro Iwata,
- Tomokatsu Morota,
- Yasuhiro Yokota,
- Toru Kouyama,
- Rie Honda,
- Shingo Kameda,
- Yuichiro Cho,
- Kazuo Yoshioka,
- Hirotaka Sawada,
- Masahiko Hayakawa,
- Naoya Sakatani,
- Manabu Yamada,
- Hidehiko Suzuki,
- Chikatoshi Honda,
- Kazunori Ogawa,
- Kei Shirai,
- Cateline Lantz,
- Stefano Rubino,
- Hisayoshi Yurimoto,
- Takaaki Noguchi,
- Ryuji Okazaki,
- Hikaru Yabuta,
- Hiroshi Naraoka,
- Kanako Sakamoto,
- Shogo Tachibana,
- Toru Yada,
- Masahiro Nishimura,
- Aiko Nakato,
- Akiko Miyazaki,
- Kasumi Yogata,
- Masanao Abe,
- Tatsuaki Okada,
- Tomohiro Usui,
- Makoto Yoshikawa,
- Takanao Saiki,
- Satoshi Tanaka,
- Fuyuto Terui,
- Satoru Nakazawa,
- Sei-ichiro Watanabe,
- Yuichi Tsuda
Affiliations
- Moe Matsuoka
- Geological Survey of Japan (GSJ), National Institute of Advanced Industrial Science and Technology (AIST)
- Ei-ichi Kagawa
- Department of Earth Science, Tohoku University
- Kana Amano
- Department of Earth Science, Tohoku University
- Tomoki Nakamura
- Department of Earth Science, Tohoku University
- Eri Tatsumi
- Instituto de Astrofisica de Canrias, Calle Vía Láctea
- Takahito Osawa
- Japan Atomic Energy Agency
- Takahiro Hiroi
- Department of Earth, Environmental and Planetary Sciences, Brown University
- Ralph Milliken
- Department of Earth, Environmental and Planetary Sciences, Brown University
- Deborah Domingue
- Planetary Science Institute
- Driss Takir
- Jacobs, NASA Johnson Space Center
- Rosario Brunetto
- Institut d’Astrophysique Spatiale, Université Paris-Saclay, CNRS
- Antonella Barucci
- LESIA-Observatoire de Paris, Université PSL, CNRS, Université de Paris, Sorbonne Université
- Kohei Kitazato
- Aizu Research Cluster for Space Science, University of Aizu
- Seiji Sugita
- Department of Earth and Planetary Science, University of Tokyo
- Yuri Fujioka
- Department of Earth Science, Tohoku University
- Osamu Sasaki
- Tohoku University Museum, Tohoku University
- Shiho Kobayashi
- Department of Earth Science, Tohoku University
- Takahiro Iwata
- Institute of Space and Astronautical Science (ISAS), Japan Aerospace Exploration Agency (JAXA)
- Tomokatsu Morota
- Department of Earth and Planetary Science, University of Tokyo
- Yasuhiro Yokota
- Institute of Space and Astronautical Science (ISAS), Japan Aerospace Exploration Agency (JAXA)
- Toru Kouyama
- Digital Architecture Research Center, National Institute of Advanced Industrial Science and Technology
- Rie Honda
- Center for Data Science, Ehime University
- Shingo Kameda
- Department of Physics, Rikkyo University
- Yuichiro Cho
- Department of Earth and Planetary Science, University of Tokyo
- Kazuo Yoshioka
- Department of Complexity Science and Engineering, University of Tokyo
- Hirotaka Sawada
- Institute of Space and Astronautical Science (ISAS), Japan Aerospace Exploration Agency (JAXA)
- Masahiko Hayakawa
- Institute of Space and Astronautical Science (ISAS), Japan Aerospace Exploration Agency (JAXA)
- Naoya Sakatani
- Institute of Space and Astronautical Science (ISAS), Japan Aerospace Exploration Agency (JAXA)
- Manabu Yamada
- Planetary Exploration Research Center, Chiba Institute of Technology
- Hidehiko Suzuki
- Department of Physics, Meiji University
- Chikatoshi Honda
- Aizu Research Cluster for Space Science, University of Aizu
- Kazunori Ogawa
- Institute of Space and Astronautical Science (ISAS), Japan Aerospace Exploration Agency (JAXA)
- Kei Shirai
- Department of Planetology, Kobe University
- Cateline Lantz
- Institut d’Astrophysique Spatiale, Université Paris-Saclay, CNRS
- Stefano Rubino
- Institut d’Astrophysique Spatiale, Université Paris-Saclay, CNRS
- Hisayoshi Yurimoto
- Department of Earth and Planetary Sciences, Hokkaido University
- Takaaki Noguchi
- Division of Earth and Planetary Sciences, Kyoto University
- Ryuji Okazaki
- Department of Earth and Planetary Sciences, Kyushu University
- Hikaru Yabuta
- Department of Earth and Planetary Systems Science, Hiroshima University
- Hiroshi Naraoka
- Department of Earth and Planetary Sciences, Kyushu University
- Kanako Sakamoto
- Institute of Space and Astronautical Science (ISAS), Japan Aerospace Exploration Agency (JAXA)
- Shogo Tachibana
- Department of Earth and Planetary Science, University of Tokyo
- Toru Yada
- Institute of Space and Astronautical Science (ISAS), Japan Aerospace Exploration Agency (JAXA)
- Masahiro Nishimura
- Institute of Space and Astronautical Science (ISAS), Japan Aerospace Exploration Agency (JAXA)
- Aiko Nakato
- Institute of Space and Astronautical Science (ISAS), Japan Aerospace Exploration Agency (JAXA)
- Akiko Miyazaki
- Institute of Space and Astronautical Science (ISAS), Japan Aerospace Exploration Agency (JAXA)
- Kasumi Yogata
- Institute of Space and Astronautical Science (ISAS), Japan Aerospace Exploration Agency (JAXA)
- Masanao Abe
- Institute of Space and Astronautical Science (ISAS), Japan Aerospace Exploration Agency (JAXA)
- Tatsuaki Okada
- Institute of Space and Astronautical Science (ISAS), Japan Aerospace Exploration Agency (JAXA)
- Tomohiro Usui
- Institute of Space and Astronautical Science (ISAS), Japan Aerospace Exploration Agency (JAXA)
- Makoto Yoshikawa
- Institute of Space and Astronautical Science (ISAS), Japan Aerospace Exploration Agency (JAXA)
- Takanao Saiki
- Institute of Space and Astronautical Science (ISAS), Japan Aerospace Exploration Agency (JAXA)
- Satoshi Tanaka
- Institute of Space and Astronautical Science (ISAS), Japan Aerospace Exploration Agency (JAXA)
- Fuyuto Terui
- Department of Mechanical Engineering, Kanagawa Institute of Technology
- Satoru Nakazawa
- Institute of Space and Astronautical Science (ISAS), Japan Aerospace Exploration Agency (JAXA)
- Sei-ichiro Watanabe
- Department of Earth and Environmental Sciences, Nagoya University
- Yuichi Tsuda
- Institute of Space and Astronautical Science (ISAS), Japan Aerospace Exploration Agency (JAXA)
- DOI
- https://doi.org/10.1038/s43247-023-00991-3
- Journal volume & issue
-
Vol. 4,
no. 1
pp. 1 – 12
Abstract
Abstract Returned samples from Cb-type asteroid (162173) Ryugu exhibit very dark spectra in visible and near-infrared ranges, generally consistent with the Hayabusa2 observations. A critical difference is that a structural water absorption of hydrous silicates is around twice as deep in the returned samples compared with those of Ryugu’s surface, suggesting Ryugu surface is more dehydrated. Here we use laboratory experiments data to indicate the spectral differences between returned samples and asteroid surface are best explained if Ryugu surface has (1) higher porosity, (2) larger particle size, and (3) more space-weathered condition, with the last being the most effective. On Ryugu, space weathering by micrometeoroid bombardments promoting dehydration seem to be more effective than that by solar-wind implantation. Extremely homogeneous spectra of the Ryugu’s global surface is in contrast with the heterogeneous S-type asteroid (25143) Itokawa’s spectra, which suggests space weathering has proceeded more rapidly on Cb-type asteroids than S-type asteroids.
