学際科学研究系

佐伯 孝尚

サイキ タカナオ  (Takanao Saiki)

基本情報

所属
国立研究開発法人宇宙航空研究開発機構 宇宙科学研究所 教授
学位
博士(工学)(2005年3月 東京大学)

J-GLOBAL ID
200901090793977023
researchmap会員ID
5000092383

学歴

 3

受賞

 23

論文

 223
  • Mutsumi Komatsu, Hikaru Yabuta, Yoko Kebukawa, Lydie Bonal, Eric Quirico, Timothy J. Fagan, George D. Cody, Jens Barosch, Laure Bejach, Emmanuel Dartois, Alexandre Dazzi, Bradley De Gregorio, Ariane Deniset‐Besseau, Jean Duprat, Cecile Engrand, Minako Hashiguchi, Zita Martins, Jérémie Mathurin, Gilles Montagnac, Smail Mostefaoui, Larry R. Nittler, Takuji Ohigashi, Taiga Okumura, Laurent Rémusat, Scott Sandford, Rhonda Stroud, Hiroki Suga, Yoshio Takahashi, Yasuo Takeichi, Yusuke Tamenori, Maximilien Verdier‐Paoletti, Shohei Yamashita, Hisayoshi Yurimoto, Tomoki Nakamura, Takaaki Noguchi, Ryuji Okazaki, Hiroshi Naraoka, Kanako Sakamoto, Makoto Yoshikawa, Takanao Saiki, Satoshi Tanaka, Fuyuto Terui, Satoru Nakazawa, Tomohiro Usui, Masanao Abe, Tatsuaki Okada, Toru Yada, Masahiro Nishimura, Aiko Nakato, Akiko Miyazaki, Kasumi Yogata, Shogo Tachibana, Sei‐ichiro Watanabe, Yuichi Tsuda
    Meteoritics & Planetary Science 2024年7月4日  
  • Larry R Nittler, Jens Barosch, Katherine Burgess, Rhonda M Stroud, Jianhua Wang, Hikaru Yabuta, Yuma Enokido, Megumi Matsumoto, Tomoki Nakamura, Yoko Kebukawa, Shohei Yamashita, Yoshio Takahashi, Laure Bejach, Lydie Bonal, George D Cody, Emmanuel Dartois, Alexandre Dazzi, Bradley De Gregorio, Ariane Deniset-Besseau, Jean Duprat, Cécile Engrand, Minako Hashiguchi, A.L. David Kilcoyne, Mutsumi Komatsu, Zita Martins, Jérémie Mathurin, Gilles Montagnac, Smail Mostefaoui, Taiga Okumura, Eric Quirico, Laurent Remusat, Scott Sandford, Miho Shigenaka, Hiroki Suga, Yasuo Takeichi, Yusuke Tamenori, Maximilien Verdier-Paoletti, Daisuke Wakabayashi, Masanao Abe, Kanami Kamide, Akiko Miyazaki, Aiko Nakato, Satoru Nakazawa, Masahiro Nishimura, Tatsuaki Okada, Takanao Saiki, Satoshi Tanaka, Fuyuto Terui, Tomohiro Usui, Toru Yada, Kasumi Yogata, Makoto Yoshikawa, Hisayoshi Yurimoto, Takaaki Noguchi, Ryuji Okazaki, Hiroshi Naraoka, Kanako Sakamoto, Shogo Tachibana, Sei-ichiro Watanabe, Yuichi Tsuda
    Earth and Planetary Science Letters 637 118719-118719 2024年7月  
  • Shota Kikuchi, Kei Shirai, Ko Ishibashi, Koji Wada, Yasuhiro Yokota, Rie Honda, Toshihiko Kadono, Yuri Shimaki, Naoya Sakatani, Kazunori Ogawa, Hirotaka Sawada, Takanao Saiki, Yuya Mimasu, Yuto Takei, Seiji Sugita, Toru Kouyama, Naru Hirata, Satoru Nakazawa, Makoto Yoshikawa, Satoshi Tanaka, Sei-ichiro Watanabe, Yuichi Tsuda, Masahiko Arakawa
    Advances in Space Research 2024年5月  
  • Ko Hashizume, Akizumi Ishida, Ayano Chiba, Ryuji Okazaki, Kasumi Yogata, Toru Yada, Fumio Kitajima, Hisayoshi Yurimoto, Tomoki Nakamura, Takaaki Noguchi, Hikaru Yabuta, Hiroshi Naraoka, Yoshinori Takano, Kanako Sakamoto, Shogo Tachibana, Masahiro Nishimura, Aiko Nakato, Akiko Miyazaki, Masanao Abe, Tatsuaki Okada, Tomohiro Usui, Makoto Yoshikawa, Takanao Saiki, Fuyuto Terui, Satoshi Tanaka, Satoru Nakazawa, Sei‐ichiro Watanabe, Yuichi Tsuda, Michael W. Broadley, Henner Busemann
    Meteoritics & Planetary Science 2024年4月30日  
    Abstract The nitrogen isotope compositions of two samples returned from the asteroid Ryugu were determined using a stepwise combustion method, along with Ivuna (CI) and Y‐980115, a CI‐like Antarctic meteorite, as references. The two Ryugu samples A0105‐07 and C0106‐07 showed bulk δ15N values of +1.7 ± 0.5‰ and +0.2 ± 0.6‰, respectively, significantly lower than Ivuna with +36.4 ± 0.4‰, but close to Y‐980115 with +4.0 ± 0.3‰. The Ryugu samples are further characterized by C/N and 36Ar/N ratios up to 3.4× and 4.9× the value of Ivuna, respectively. Among all Ryugu samples and CI chondrites, a positive correlation was observed between nitrogen concentrations and δ15N values, with samples with lower nitrogen concentrations exhibiting lower δ15N. This trend is explained by a two‐component mixing model. One component is present at a constant abundance among all CI‐related samples, with a δ15N value around 0‰ or lower. The other varies in abundance between different samples, and exhibits a δ15N value of +56 ± 4‰. The first 15N‐poor endmember is seemingly tightly incorporated into a carbonaceous host phase, whereas the 15N‐rich endmember can be mobilized and decoupled from carbon, potentially because it is in the form of ammonia. Asteroid materials with volatile compositions that are similar to those reported here for the Ryugu samples are attractive candidates for the volatile sources among Earth's building blocks.
  • Yan Hu, Frédéric Moynier, Wei Dai, Marine Paquet, Tetsuya Yokoyama, Yoshinari Abe, Jérôme Aléon, Conel M.O.D. Alexander, Sachiko Amari, Yuri Amelin, Ken ichi Bajo, Martin Bizzarro, Audrey Bouvier, Richard W. Carlson, Marc Chaussidon, Byeon Gak Choi, Nicolas Dauphas, Andrew M. Davis, Tommaso Di Rocco, Wataru Fujiya, Ryota Fukai, Ikshu Gautam, Makiko K. Haba, Yuki Hibiya, Hiroshi Hidaka, Hisashi Homma, Peter Hoppe, Gary R. Huss, Kiyohiro Ichida, Tsuyoshi Iizuka, Trevor R. Ireland, Akira Ishikawa, Shoichi Itoh, Noriyuki Kawasaki, Noriko T. Kita, Koki Kitajima, Thorsten Kleine, Shintaro Komatani, Alexander N. Krot, Ming Chang Liu, Yuki Masuda, Mayu Morita, Kazuko Motomura, Izumi Nakai, Kazuhide Nagashima, David Nesvorný, Ann Nguyen, Larry Nittler, Morihiko Onose, Andreas Pack, Changkun Park, Laurette Piani, Liping Qin, Sara S. Russell, Naoya Sakamoto, Maria Schönbächler, Lauren Tafla, Haolan Tang, Kentaro Terada, Yasuko Terada, Tomohiro Usui, Sohei Wada, Meenakshi Wadhwa, Richard J. Walker, Katsuyuki Yamashita, Qing Zhu Yin, Shigekazu Yoneda, Edward D. Young, Hiroharu Yui, Ai Cheng Zhang, Tomoki Nakamura, Hiroshi Naraoka, Takaaki Noguchi, Ryuji Okazaki, Kanako Sakamoto, Hikaru Yabuta, Masanao Abe, Akiko Miyazaki, Aiko Nakato, Masahiro Nishimura, Tatsuaki Okada, Toru Yada, Kasumi Yogata, Satoru Nakazawa, Takanao Saiki, Satoshi Tanaka, Fuyuto Terui, Yuichi Tsuda, Sei ichiro Watanabe, Makoto Yoshikawa, Shogo Tachibana, Hisayoshi Yurimoto
    Icarus 409 2024年2月  査読有り
    C-type asteroids are the presumed home to carbonaceous chondrites, some of which contain abundant life-forming volatiles and organics. For the first time, samples from a C-type asteroid (162173 Ryugu) were successfully returned to Earth by JAXA's Hayabusa2 mission. These pristine samples, uncontaminated by the terrestrial environment, allow a direct comparison with carbonaceous chondrites. This study reports the stable K isotopic compositions (expressed as δ41K) of Ryugu samples and seven carbonaceous chondrites to constrain the origin of K isotopic variations in the early Solar System. Three aliquots of Ryugu particles collected at two touchdown sites have identical δ41K values, averaged at −0.194 ± 0.038‰ (2SD). The K isotopic composition of Ryugu falls within the range of δ41K values measured on representative CI chondrites, and together, they define an average δ41K value of −0.185 ± 0.078‰ (2SE), which provides the current best estimate of the K isotopic composition of the bulk Solar System. Samples of CI chondrites with δ41K values that deviate from this range likely reflect terrestrial contaminations or compositional heterogeneities at sampled sizes. In addition to CI chondrites, substantial K isotopic variability is observed in other carbonaceous chondrites and within individual chondritic groups, with δ41K values inversely correlated with K abundances in many cases. These observations indicate widespread fluid activity occurred in chondrite parent bodies, which significantly altered the original K abundances and isotopic compositions of chondrules and matrices established at their accretion.

MISC

 205
  • 佐伯 孝尚, 森 治, 吉光 徹雄, 田邊 宏太, 古賀 勝, 目黒 裕章, 狩谷 和季, 山田 亨, 田中 智, 諸田 智克
    年会講演会 = JSASS annual meeting 54 4p 2023年4月  
  • 諸田 智克, 長 勇一郎, 長岡 央, 仲内 悠祐, 田畑 陽久, 相田 真里, 与賀田 佳澄, 水野 貴秀, 杉田 精司, 山田 亨, 井口 聖, 大西 利和, 高橋 慶太郎, 土屋 史紀, 山内 大介, 磯部 直樹, 岩田 隆浩, 宇佐美 尚人, 関本 勇太郎, 宮崎 康行, 新谷 昌人, 辻 健, 小野寺 圭祐, 川村 太一, 田中 智, 吉光 徹雄, 森 治, 佐伯 孝尚
    年会講演会 = JSASS annual meeting 54 4p 2023年4月  
  • 佐伯孝尚, 森治, 吉光徹雄, 田邊宏太, 古賀勝, 目黒裕章, 狩谷和季, 山田亨, 田中智, 諸田智克
    日本航空宇宙学会年会講演会講演集(CD-ROM) 54th 2023年  
  • 森治, 佐伯孝尚, 吉光徹雄, 田邊宏太, 古賀勝, 目黒裕章, 狩谷和季, 山田亨, 田中智, 諸田智克
    宇宙科学技術連合講演会講演集(CD-ROM) 67th 2023年  
  • 黒川宏之, 嶌生有理, 岡田達明, 佐伯孝尚, 津田雄一, 森治, 坂谷尚哉, 深井稜汰, 青木順, 癸生川陽子, 熊本篤志, 田中智, 川村太一, 浦川聖太郎, 巽瑛理, 高尾勇輝, 菊地翔太, 瀧川晶, 奥住聡, 古家健次, 金丸仁明, 荒川創太
    日本惑星科学会秋季講演会予稿集(Web) 2023 2023年  

書籍等出版物

 2

講演・口頭発表等

 2

所属学協会

 1

共同研究・競争的資金等の研究課題

 7

産業財産権

 2