研究者詳細 - 渡邊　誠一郎

論文 - 渡邊　誠一郎

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Influx of nitrogen-rich material from the outer Solar System indicated by iron nitride in Ryugu samples 査読有り国際共著国際誌

Matsumoto, T; Noguchi, T; Miyake, A; Igami, Y; Haruta, M; Seto, Y; Miyahara, M; Tomioka, N; Saito, H; Hata, S; Harries, D; Takigawa, A; Nakauchi, Y; Tachibana, S; Nakamura, T; Matsumoto, M; Ishii, HA; Bradley, JP; Ohtaki, K; Dobrica, E; Leroux, H; Le Guillou, C; Jacob, D; de la Peña, F; Laforet, S; Marinova, M; Langenhorst, F; Beck, P; Phan, THV; Rebois, R; Abreu, NM; Gray, J; Zega, T; Zanetta, PM; Thompson, MS; Stroud, R; Burgess, K; Cymes, BA; Bridges, JC; Hicks, L; Lee, MR; Daly, L; Bland, PA; Zolensky, ME; Frank, DR; Martinez, J; Tsuchiyama, A; Yasutake, M; Matsuno, J; Okumura, S; Mitsukawa, I; Uesugi, K; Uesugi, M; Takeuchi, A; Sun, MQ; Enju, S; Michikami, T; Yurimoto, H; Okazaki, R; Yabuta, H; Naraoka, H; Sakamoto, K; Yada, T; Nishimura, M; Nakato, A; Miyazaki, A; Yogata, K; Abe, M; Okada, T; Usui, T; Yoshikawa, M; Saiki, T; Tanaka, S; Terui, F; Nakazawa, S; Watanabe, SI; Tsuda, Y

NATURE ASTRONOMY 2023年11月

Water circulation in Ryugu asteroid affected the distribution of nucleosynthetic isotope anomalies in returned sample 査読有り国際共著国際誌

Yokoyama, T; Wadhwa, M; Iizuka, T; Rai, V; Gautam, I; Hibiya, Y; Masuda, Y; Haba, MK; Fukai, R; Hines, R; Phelan, N; Abe, Y; Aléon, J; Alexander, CMO; Amari, S; Amelin, Y; Bajo, K; Bizzarro, M; Bouvier, A; Carlson, RW; Chaussidon, M; Choi, BG; Dauphas, N; Davis, AM; Di Rocco, T; Fujiya, W; Hidaka, H; Homma, H; Hoppe, P; Huss, GR; Ichida, K; Ireland, T; Ishikawa, A; Itoh, S; Kawasaki, N; Kita, NT; Kitajima, K; Kleine, T; Komatani, S; Krot, AN; Liu, MC; McKeegan, KD; Morita, M; Motomura, K; Moynier, F; Nakai, I; Nagashima, K; Nguyen, A; Nittler, L; Onose, M; Pack, A; Park, C; Piani, L; Qin, LP; Russell, S; Sakamoto, N; Schönbächler, M; Tafla, L; Tang, HL; Terada, K; Terada, Y; Usui, T; Wada, S; Walker, RJ; Yamashita, K; Yin, QZ; Yoneda, S; Young, ED; Yui, H; Zhang, AC; Nakamura, T; Naraoka, H; Noguchi, T; Okazaki, R; Sakamoto, K; Yabuta, H; Abe, M; Miyazaki, A; Nakato, A; Nishimura, M; Okada, T; Yada, T; Yogata, K; Nakazawa, S; Saiki, T; Tanaka, S; Terui, F; Tsuda, Y; Watanabe, S; Yoshikawa, M; Tachibana, S; Yurimoto, H

SCIENCE ADVANCES 9 巻 ( 45 ) 2023年11月

Space weathering record and pristine state of Ryugu samples from MicrOmega spectral analysis 査読有り国際共著国際誌

Le Pivert-Jolivet, T; Brunetto, R; Pilorget, C; Bibring, JP; Nakato, A; Hamm, V; Hatakeda, K; Lantz, C; Loizeau, D; Riu, L; Yogata, K; Baklouti, D; Poulet, F; Aleon-Toppani, A; Carter, J; Langevin, Y; Okada, T; Yada, T; Hitomi, Y; Kumagai, K; Miyazaki, A; Nagashima, K; Nishimura, M; Usui, T; Abe, M; Saiki, T; Tanaka, S; Nakazawa, S; Tsuda, Y; Watanabe, S

NATURE ASTRONOMY 2023年10月

Space weathering acts strongly on the uppermost surface of Ryugu 査読有り国際共著国際誌

Matsuoka, M; Kagawa, E; Amano, K; Nakamura, T; Tatsumi, E; Osawa, T; Hiroi, T; Milliken, R; Domingue, D; Takir, D; Brunetto, R; Barucci, A; Kitazato, K; Sugita, S; Fujioka, Y; Sasaki, O; Kobayashi, S; Iwata, T; Morota, T; Yokota, Y; Kouyama, T; Honda, R; Kameda, S; Cho, Y; Yoshioka, K; Sawada, H; Hayakawa, M; Sakatani, N; Yamada, M; Suzuki, H; Honda, C; Ogawa, K; Shirai, K; Lantz, C; Rubino, S; Yurimoto, H; Noguchi, T; Okazaki, R; Yabuta, H; Naraoka, H; Sakamoto, K; Tachibana, S; Yada, T; Nishimura, M; Nakato, A; Miyazaki, A; Yogata, K; Abe, M; Okada, T; Usui, T; Yoshikawa, M; Saiki, T; Tanaka, S; Terui, F; Nakazawa, S; Watanabe, S; Tsuda, Y

COMMUNICATIONS EARTH & ENVIRONMENT 4 巻 ( 1 ) 2023年9月

Carbonate record of temporal change in oxygen fugacity and gaseous species in asteroid Ryugu 査読有り国際共著国際誌

Fujiya, W; Kawasaki, N; Nagashima, K; Sakamoto, N; Alexander, CMO; Kita, NT; Kitajima, K; Abe, Y; Aléon, J; Amari, S; Amelin, Y; Bajo, K; Bizzarro, M; Bouvier, A; Carlson, RW; Chaussidon, M; Choi, BG; Dauphas, N; Davis, AM; Di Rocco, T; Fukai, R; Gautam, I; Haba, MK; Hibiya, Y; Hidaka, H; Homma, H; Hoppe, P; Huss, GR; Ichida, K; Iizuka, T; Ireland, TR; Ishikawa, A; Itoh, S; Kleine, T; Komatani, S; Krot, AN; Liu, MC; Masuda, Y; McKeegan, KD; Morita, M; Motomura, K; Moynier, F; Nakai, I; Nguyen, A; Nittler, L; Onose, M; Pack, A; Park, C; Piani, L; Qin, LP; Russell, SS; Schönbächler, M; Tafla, L; Tang, HL; Terada, K; Terada, Y; Usui, T; Wada, S; Wadhwa, M; Walker, RJ; Yamashita, K; Yin, QZ; Yokoyama, T; Yoneda, S; Young, ED; Yui, H; Zhang, AC; Nakamura, T; Naraoka, H; Noguchi, T; Okazaki, R; Sakamoto, K; Yabuta, H; Abe, M; Miyazaki, A; Nakato, A; Nishimura, M; Okada, T; Yada, T; Yogata, K; Nakazawa, S; Saiki, T; Tanaka, S; Terui, F; Tsuda, Y; Watanabe, S; Yoshikawa, M; Tachibana, S; Yurimoto, H

NATURE GEOSCIENCE 16 巻 ( 8 ) 頁： 675 - + 2023年8月

Ryugu's Anhydrous Ingredients and Their Spectral Link to Primitive Dust from the Outer Solar System 査読有り国際共著国際誌

Brunetto R., Lantz C., Fukuda Y., Aleon-Toppani A., Nakamura T., Dionnet Z., Baklouti D., Borondics F., Djouadi Z., Rubino S., Amano K., Matsumoto M., Fujioka Y., Morita T., Kukuiri M., Kagawa E., Matsuoka M., Milliken R., Yurimoto H., Noguchi T., Okazaki R., Yabuta H., Naraoka H., Sakamoto K., Tachibana S., Yada T., Nishimura M., Nakato A., Miyazaki A., Yogata K., Abe M., Okada T., Usui T., Yoshikawa M., Saiki T., Tanaka S., Terui F., Nakazawa S., Watanabe S., Tsuda Y.

ASTROPHYSICAL JOURNAL LETTERS 951 巻 ( 2 ) 2023年7月

A history of mild shocks experienced by the regolith particles on hydrated asteroid Ryugu 査読有り国際共著国際誌

Tomioka, N; Yamaguchi, A; Ito, M; Uesugi, M; Imae, N; Shirai, N; Ohigashi, T; Kimura, M; Liu, MC; Greenwood, RC; Uesugi, K; Nakato, A; Yogata, K; Yuzawa, H; Kodama, Y; Hirahara, K; Sakurai, I; Okada, I; Karouji, Y; Okazaki, K; Kurosawa, K; Noguchi, T; Miyake, A; Miyahara, M; Seto, Y; Matsumoto, T; Igami, Y; Nakazawa, S; Okada, T; Saiki, T; Tanaka, S; Terui, F; Yoshikawa, M; Miyazaki, A; Nishimura, M; Yada, T; Abe, M; Usui, T; Watanabe, S; Tsuda, Y

NATURE ASTRONOMY 7 巻 ( 6 ) 頁： 669 - 677 2023年6月

The spatial distribution of soluble organic matter and their relationship to minerals in the asteroid (162173) Ryugu 査読有り国際共著国際誌

Hashiguchi Minako, Aoki Dan, Fukushima Kazuhiko, Naraoka Hiroshi, Takano Yoshinori, Dworkin Jason P., Dworkin Karin E., Aponte Jose C., Elsila Jamie E., Eiler John M., Furukawa Yoshihiro, Furusho Aogu, Glavin Daniel P., Graham Heather V., Hamase Kenji, Hertkorn Norbert, Isa Junko, Koga Toshiki, McLain Hannah L., Mita Hajime, Oba Yasuhiro, Ogawa Nanako O., Ohkouchi Naohiko, Orthous-Daunay Francois-Regis, Parker Eric T., Ruf Alexander, Sakai Saburo, Schmitt-Kopplin Philippe, Sugahara Haruna, Thissen Roland, Vuitton Veronique, Wolters Cedric, Yoshimura Toshihiro, Yurimoto Hisayoshi, Nakamura Tomoki, Noguchi Takaaki, Okazaki Ryuji, Yabuta Hikaru, Sakamoto Kanako, Tachibana Shogo, Yada Toru, Nishimura Masahiro, Nakato Aiko, Miyazaki Akiko, Yogata Kasumi, Abe Masanao, Usui Tomohiro, Yoshikawa Makoto, Saiki Takanao, Tanaka Satoshi, Terui Fuyuto, Nakazawa Satoru, Watanabe Sei-ichiro, Tsuda Yuichi

EARTH, PLANETS AND SPACE 75 巻 ( 1 ) 2023年5月

Nonequilibrium spherulitic magnetite in the Ryugu samples 査読有り国際共著国際誌

Dobrica, E; Ishii, HA; Bradley, JP; Ohtaki, K; Brearley, AJ; Noguchi, T; Matsumoto, T; Miyake, A; Igami, Y; Haruta, M; Saito, H; Hata, S; Seto, Y; Miyahara, M; Tomioka, N; Leroux, H; Le Guillou, C; Jacob, D; Pena, FD; Laforet, S; Marinova, M; Langenhorst, F; Harries, D; Beck, P; Phan, THV; Rebois, R; Abreu, NM; Gray, J; Zega, T; Zanetta, PM; Thompson, MS; Stroud, R; Burgess, K; Cymes, BA; Bridges, JC; Hicks, L; Lee, MR; Daly, L; Bland, PA; Zolensky, ME; Frank, DR; Martinez, J; Tsuchiyama, A; Yasutake, M; Matsuno, J; Okumura, S; Mitsukawa, I; Uesugi, K; Uesugi, M; Takeuchi, A; Sun, MQ; Enju, S; Takigawa, A; Michikami, T; Nakamura, T; Matsumoto, M; Nakauchi, Y; Yurimoto, H; Okazaki, R; Yabuta, H; Naraoka, H; Sakamoto, K; Tachibana, S; Yada, T; Nishimura, M; Nakato, A; Miyazaki, A; Yogata, K; Abe, M; Okada, T; Usui, T; Yoshikawa, M; Saiki, T; Tanaka, S; Terui, F; Nakazawa, S; Watanabe, S; Tsuda, Y

GEOCHIMICA ET COSMOCHIMICA ACTA 346 巻頁： 65 - 75 2023年4月

Exploration-Based Reconstruction of Planetesimals 招待有り査読有り国際共著

Sei-ichiro Watanabe, Masahiko Arakawa, Masatoshi Hirabayashi, Seiji Sugita, William F. Bottke, Patrick Michel

Protostars and Planets VII (Astronomical Society of the Pacific) 頁： 993 - 1029 2023年4月

Variations of the surface characteristics of Ryugu returned samples 査読有り国際共著国際誌

Nakato Aiko, Yada Toru, Nishimura Masahiro, Yogata Kasumi, Miyazaki Akiko, Nagashima Kana, Hatakeda Kentaro, Kumagai Kazuya, Hitomi Yuya, Soejima Hiromichi, Bibring Jean-Pierre, Pilorget Cedric, Hamm Vincent, Brunetto Rosario, Riu Lucie, Lourit Lionel, Loizeau Damien, Le Pivert-Jolivet Tania, Lequertier Guillaume, Moussi-Soffys Aurelie, Abe Masanao, Okada Tatsuaki, Usui Tomohiro, Nakazawa Satoru, Saiki Takanao, Tanaka Satoshi, Terui Fuyuto, Yoshikawa Makoto, Watanabe Sei-ichiro, Tsuda Yuichi

EARTH PLANETS AND SPACE 75 巻 ( 1 ) 2023年3月

Uracil in the carbonaceous asteroid (162173) Ryugu 査読有り国際共著国際誌

Yasuhiro Oba, Toshiki Koga, Yoshinori Takano, Nanako O. Ogawa, Naohiko Ohkouchi, Kazunori Sasaki, Hajime Sato, Daniel P. Glavin, Jason P. Dworkin, Hiroshi Naraoka, Shogo Tachibana, Hisayoshi Yurimoto, Tomoki Nakamura, Takaaki Noguchi, Ryuji Okazaki, Hikaru Yabuta, Kanako Sakamoto, 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, Hayabusa2-initial-analysis SOM team

Nature Communications 14 巻 ( 1 ) 頁： 1292 2023年3月

Insight into multi-step geological evolution of C-type asteroids from Ryugu particles 査読有り国際共著国際誌

Yamaguchi Akira, Tomioka Naotaka, Ito Motoo, Shirai Naoki, Kimura Makoto, Greenwood Richard C. C., Liu Ming-Chang, McCain Kaitlyn A. A., Matsuda Nozomi, Uesugi Masayuki, Imae Naoya, Ohigashi Takuji, Uesugi Kentaro, Nakato Aiko, Yogata Kasumi, Yuzawa Hayato, Kodama Yu, Hirahara Kaori, Sakurai Ikuya, Okada Ikuo, Karouji Yuzuru, Nakazawa Satoru, Okada Tatsuaki, Saiki Takanao, Tanaka Satoshi, Terui Fuyuto, Yoshikawa Makoto, Miyazaki Akiko, Nishimura Masahiro, Yada Toru, Abe Masanao, Usui Tomohiro, Watanabe Sei-ichiro, Tsuda Yuichi

NATURE ASTRONOMY 2023年3月

PAHs, hydrocarbons, and dimethylsulfides in Asteroid Ryugu samples A0106 and C0107 and the Orgueil (CI1) meteorite 査読有り国際共著国際誌

Aponte Jose C., Dworkin Jason P., Glavin Daniel P., Elsila Jamie E., Parker Eric T., McLain Hannah L., Naraoka Hiroshi, Okazaki Ryuji, Takano Yoshinori, Tachibana Shogo, Dong Guannan, Zeichner Sarah S., Eiler John M., Yurimoto Hisayoshi, Nakamura Tomoki, Yabuta Hikaru, Terui Fuyuto, Noguchi Takaaki, Sakamoto Kanako, Yada Toru, Nishimura Masahiro, Nakato Aiko, Miyazaki Akiko, Yogata Kasumi, Abe Masanao, Okada Tatsuaki, Usui Tomohiro, Yoshikawa Makoto, Saiki Takanao, Tanaka Satoshi, Nakazawa Satoru, Tsuda Yuichi, Watanabe Sei-ichiro

EARTH PLANETS AND SPACE 75 巻 ( 1 ) 2023年2月

Macromolecular organic matter in samples of the asteroid (162173) Ryugu 査読有り国際共著

Hikaru Yabuta, George D. Cody, Cécile Engrand, Yoko Kebukawa, Bradley De Gregorio, Lydie Bonal, Laurent Remusat, Rhonda Stroud, Eric Quirico, Larry Nittler, Minako Hashiguchi, Mutsumi Komatsu, Taiga Okumura, Jérémie Mathurin, Emmanuel Dartois, Jean Duprat, Yoshio Takahashi, Yasuo Takeichi, David Kilcoyne, Shohei Yamashita, Alexandre Dazzi, Ariane Deniset-Besseau, Scott Sandford, Zita Martins, Yusuke Tamenori, Takuji Ohigashi, Hiroki Suga, Daisuke Wakabayashi, Maximilien Verdier-Paoletti, Smail Mostefaoui, Gilles Montagnac, Jens Barosch, Kanami Kamide, Miho Shigenaka, Laure Bejach, Megumi Matsumoto, Yuma Enokido, Takaaki Noguchi, Hisayoshi Yurimoto, Tomoki Nakamura, Ryuji Okazaki, Hiroshi Naraoka, Kanako Sakamoto, Harold C. Connolly, Dante S. Lauretta, Masanao Abe, Tatsuaki Okada, Toru Yada, Masahiro Nishimura, Kasumi Yogata, Aiko Nakato, Miwa Yoshitake, Ayako Iwamae, Shizuho Furuya, Kentaro Hatakeda, Akiko Miyazaki, Hiromichi Soejima, Yuya Hitomi, Kazuya Kumagai, Tomohiro Usui, Tasuku Hayashi, Daiki Yamamoto, Ryota Fukai, Seiji Sugita, Kohei Kitazato, Naru Hirata, Rie Honda, Tomokatsu Morota, Eri Tatsumi, Naoya Sakatani, Noriyuki Namiki, Koji Matsumoto, Rina Noguchi, Koji Wada, Hiroki Senshu, Kazunori Ogawa, Yasuhiro Yokota, Yoshiaki Ishihara, Yuri Shimaki, Manabu Yamada, Chikatoshi Honda, Tatsuhiro Michikami, Moe Matsuoka, Naoyuki Hirata, Masahiko Arakawa, Chisato Okamoto, Masateru Ishiguro, Ralf Jaumann, Jean-Pierre Bibring, Matthias Grott, Stefan Schröder, Katharina Otto, Cedric Pilorget, Nicole Schmitz, Jens Biele, Tra-Mi Ho, Aurélie Moussi-Soffys, Akira Miura, Hirotomo Noda, Tetsuya Yamada, Keisuke Yoshihara, Kosuke Kawahara, Hitoshi Ikeda, Yukio Yamamoto, Kei Shirai, Shota Kikuchi, Naoko Ogawa, Hiroshi Takeuchi, Go Ono, Yuya Mimasu, Kent Yoshikawa, Yuto Takei, Atsushi Fujii, Yu-ichi Iijima, Satoru Nakazawa, Satoshi Hosoda, Takahiro Iwata, Masahiko Hayakawa, Hirotaka Sawada, Hajime Yano, Ryudo Tsukizaki, Masanobu Ozaki, Fuyuto Terui, Satoshi Tanaka, Masaki Fujimoto, Makoto Yoshikawa, Takanao Saiki, Shogo Tachibana, Sei-ichiro Watanabe, Yuichi Tsuda

Science 379 巻 ( 6634 ) 2023年2月

担当区分：責任著者記述言語：英語掲載種別：研究論文（学術雑誌）出版者・発行元：American Association for the Advancement of Science (AAAS)

Samples of the carbonaceous asteroid (162173) Ryugu were collected and brought to Earth by the Hayabusa2 spacecraft. We investigated the macromolecular organic matter in Ryugu samples and found that it contains aromatic and aliphatic carbon, ketone, and carboxyl functional groups. The spectroscopic features of the organic matter are consistent with those in chemically primitive carbonaceous chondrite meteorites that experienced parent-body aqueous alteration (reactions with liquid water). The morphology of the organic carbon includes nanoglobules and diffuse carbon associated with phyllosilicate and carbonate minerals. Deuterium and/or nitrogen-15 enrichments indicate that the organic matter formed in a cold molecular cloud or the presolar nebula. The diversity of the organic matter indicates variable levels of aqueous alteration on Ryugu’s parent body.

DOI： 10.1126/science.abn9057

Soluble organic molecules in samples of the carbonaceous asteroid (162173) Ryugu 査読有り国際共著

Hiroshi Naraoka, Yoshinori Takano, Jason P. Dworkin, Yasuhiro Oba, Kenji Hamase, Aogu Furusho, Nanako O. Ogawa, Minako Hashiguchi, Kazuhiko Fukushima, Dan Aoki, Philippe Schmitt-Kopplin, José C. Aponte, Eric T. Parker, Daniel P. Glavin, Hannah L. McLain, Jamie E. Elsila, Heather V. Graham, John M. Eiler, Francois-Regis Orthous-Daunay, Cédric Wolters, Junko Isa, Véronique Vuitton, Roland Thissen, Saburo Sakai, Toshihiro Yoshimura, Toshiki Koga, Naohiko Ohkouchi, Yoshito Chikaraishi, Haruna Sugahara, Hajime Mita, Yoshihiro Furukawa, Norbert Hertkorn, Alexander Ruf, Hisayoshi Yurimoto, Tomoki Nakamura, Takaaki Noguchi, Ryuji Okazaki, Hikaru Yabuta, Kanako Sakamoto, Shogo Tachibana, Harold C. Connolly, Dante S. Lauretta, Masanao Abe, Toru Yada, Masahiro Nishimura, Kasumi Yogata, Aiko Nakato, Miwa Yoshitake, Ayako Suzuki, Akiko Miyazaki, Shizuho Furuya, Kentaro Hatakeda, Hiromichi Soejima, Yuya Hitomi, Kazuya Kumagai, Tomohiro Usui, Tasuku Hayashi, Daiki Yamamoto, Ryota Fukai, Kohei Kitazato, Seiji Sugita, Noriyuki Namiki, Masahiko Arakawa, Hitoshi Ikeda, Masateru Ishiguro, Naru Hirata, Koji Wada, Yoshiaki Ishihara, Rina Noguchi, Tomokatsu Morota, Naoya Sakatani, Koji Matsumoto, Hiroki Senshu, Rie Honda, Eri Tatsumi, Yasuhiro Yokota, Chikatoshi Honda, Tatsuhiro Michikami, Moe Matsuoka, Akira Miura, Hirotomo Noda, Tetsuya Yamada, Keisuke Yoshihara, Kosuke Kawahara, Masanobu Ozaki, Yu-ichi Iijima, Hajime Yano, Masahiko Hayakawa, Takahiro Iwata, Ryudo Tsukizaki, Hirotaka Sawada, Satoshi Hosoda, Kazunori Ogawa, Chisato Okamoto, Naoyuki Hirata, Kei Shirai, Yuri Shimaki, Manabu Yamada, Tatsuaki Okada, Yukio Yamamoto, Hiroshi Takeuchi, Atsushi Fujii, Yuto Takei, Kento Yoshikawa, Yuya Mimasu, Go Ono, Naoko Ogawa, Shota Kikuchi, Satoru Nakazawa, Fuyuto Terui, Satoshi Tanaka, Takanao Saiki, Makoto Yoshikawa, Sei-ichiro Watanabe, Yuichi Tsuda

Science 379 巻 ( 6634 ) 2023年2月

担当区分：責任著者記述言語：英語掲載種別：研究論文（学術雑誌）出版者・発行元：American Association for the Advancement of Science (AAAS)

The Hayabusa2 spacecraft collected samples from the surface of the carbonaceous near-Earth asteroid (162173) Ryugu and brought them to Earth. The samples were expected to contain organic molecules, which record processes that occurred in the early Solar System. We analyzed organic molecules extracted from the Ryugu surface samples. We identified a variety of molecules containing the atoms CHNOS, formed by methylation, hydration, hydroxylation, and sulfurization reactions. Amino acids, aliphatic amines, carboxylic acids, polycyclic aromatic hydrocarbons, and nitrogen-heterocyclic compounds were detected, which had properties consistent with an abiotic origin. These compounds likely arose from an aqueous reaction on Ryugu’s parent body and are similar to the organics in Ivuna-type meteorites. These molecules can survive on the surfaces of asteroids and be transported throughout the Solar System.

DOI： 10.1126/science.abn9033

Chondrule-like objects and Ca-Al-rich inclusions in Ryugu may potentially be the oldest Solar System materials 査読有り国際共著国際誌

Daisuke Nakashima, Tomoki Nakamura, Mingming Zhang, Noriko T. Kita, Takashi Mikouchi, Hideto Yoshida, Yuma Enokido, Tomoyo Morita, Mizuha Kikuiri, Kana Amano, Eiichi Kagawa, Toru Yada, Masahiro Nishimura, Aiko Nakato, Akiko Miyazaki, Kasumi Yogata, Masanao Abe, Tatsuaki Okada, Tomohiro Usui, Makoto Yoshikawa, Takanao Saiki, Satoshi Tanaka, Satoru Nakazawa, Fuyuto Terui, Hisayoshi Yurimoto, Takaaki Noguchi, Hikaru Yabuta, Hiroshi Naraoka, Ryuji Okazaki, Kanako Sakamoto, Sei-ichiro Watanabe, Shogo Tachibana, Yuichi Tsuda

Nature Communications 14 巻 ( 1 ) 頁： 532 - 532 2023年2月

記述言語：英語掲載種別：研究論文（学術雑誌）出版者・発行元：Springer Science and Business Media LLC

Abstract

Chondrule-like objects and Ca-Al-rich inclusions (CAIs) are discovered in the retuned samples from asteroid Ryugu. Here we report results of oxygen isotope, mineralogical, and compositional analysis of the chondrule-like objects and CAIs. Three chondrule-like objects dominated by Mg-rich olivine are 16O-rich and -poor with Δ17O (=δ17O – 0.52 × δ18O) values of ~ –23‰ and ~ –3‰, resembling what has been proposed as early generations of chondrules. The 16O-rich objects are likely to be melted amoeboid olivine aggregates that escaped from incorporation into 16O-poor chondrule precursor dust. Two CAIs composed of refractory minerals are 16O-rich with Δ17O of ~ –23‰ and possibly as old as the oldest CAIs. The discovered objects (<30 µm) are as small as those from comets, suggesting radial transport favoring smaller objects from the inner solar nebula to the formation location of the Ryugu original parent body, which is farther from the Sun and scarce in chondrules. The transported objects may have been mostly destroyed during aqueous alteration in the Ryugu parent body.

DOI： 10.1038/s41467-023-36268-8

PubMed

その他リンク： https://www.nature.com/articles/s41467-023-36268-8

Contribution of Ryugu-like material to Earth's volatile inventory by Cu and Zn isotopic analysis 査読有り国際共著国際誌

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NATURE ASTRONOMY 7 巻 ( 2 ) 頁： 182 - 189 2023年2月

Constraints on Solar System early evolution by MicrOmega analysis of Ryugu carbonates 査読有り国際共著

Loizeau D., Pilorget C., Riu L., Brunetto R., Bibring J. -P., Nakato A., Aleon-Toppani A., Hatakeda K., Yogata K., Carter J., Le Pivert-Jolivet T., Yada T., Okada T., Usui T., Langevin Y., Lantz C., Baklouti D., Miyazaki A., Nishimura M., Nagashima K., Kumagai K., Hitomi Y., Abe M., Saiki T., Tanaka S., Nakazawa S., Tsuda Y., Watanabe S.

NATURE ASTRONOMY 2023年1月

Early fluid activity on Ryugu inferred by isotopic analyses of carbonates and magnetite 査読有り国際共著

McCain Kaitlyn. A. A., Matsuda Nozomi, Liu Ming-Chang, McKeegan Kevin. D. D., Yamaguchi Akira, Kimura Makoto, Tomioka Naotaka, Ito Motoo, Imae Naoya, Uesugi Masayuki, Shirai Naoki, Ohigashi Takuji, Greenwood Richard. C. C., Uesugi Kentaro, Nakato Aiko, Yogata Kasumi, Yuzawa Hayato, Kodama Yu, Hirahara Kaori, Sakurai Ikuya, Okada Ikuo, Karouji Yuzuru, Nakazawa Satoru, Okada Tatsuaki, Saiki Takanao, Tanaka Satoshi, Terui Fuyuto, Yoshikawa Makoto, Miyazaki Akiko, Nishimura Masahiro, Yada Toru, Abe Masanao, Usui Tomohiro, Watanabe Sei-ichiro, Tsuda Yuichi

NATURE ASTRONOMY 2023年1月

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