研究者業績

吉川 真

ヨシカワ マコト  (Makoto YOSHIKAWA)

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 宇宙機応用工学研究系 はやぶさ2プロジェクト 准教授
学位
理学博士(1989年3月 東京大学)

連絡先
yoshikawa.makotojaxa.jp
J-GLOBAL ID
200901037361657011
researchmap会員ID
1000304540

学歴

 2

受賞

 2

論文

 278
  • Maria Schönbächler, Manuela A. Fehr, Tetsuya Yokoyama, Ikshu Gautam, Nao Nakanishi, Yoshinari Abe, Jérôme Aléon, Conel 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, Makiko K. Haba, Yuki Hibiya, Hiroshi Hidaka, Hisashi Homma, Peter Hoppe, Gary R. Huss, Kiyohiro Ichida, Tsuyoshi Iizuka, Trevor 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, Frédéric Moynier, Izumi Nakai, Kazuhide Nagashima, Ann Nguyen, Larry Nittler, Morihiko Onose, Andreas Pack, Changkun Park, Laurette Piani, Liping Qin, Sara Russell, Naoya Sakamoto, 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
    Meteoritics & Planetary Science 2024年11月25日  
    Abstract Nucleosynthetic isotope variations are powerful tracers to determine genetic relationships between meteorites and planetary bodies. They can help to link material collected by space missions to known meteorite groups. The Hayabusa 2 mission returned samples from the Cb‐type asteroid (162173) Ryugu. The mineralogical, chemical, and isotopic characteristics of these samples show strong similarities to carbonaceous chondrites and in particular CI chondrites. The nucleosynthetic isotope compositions of Ryugu overlap with CI chondrites for several elements (e.g., Cr, Ti, Fe, and Zn). In contrast to these isotopes, which are of predominately supernovae origin, s‐process variations in Mo isotope data are similar to those of carbonaceous chondrites, but even more s‐process depleted. To further constrain the origin of this depletion and test whether this signature is also present for other s‐process elements, we report Zr isotope compositions for three bulk Ryugu samples (A0106, A0106‐A0107, C0108) collected from the Hayabusa 2 mission. The data are complemented with that of terrestrial rock reference materials, eucrites, and carbonaceous chondrites. The Ryugu samples are characterized by distinct 96Zr enrichment relative to Earth, indicative of a s‐process depletion. Such depletion is also observed for carbonaceous chondrites and eucrites, in line with previous Zr isotope work, but it is more extreme in Ryugu, as observed for Mo isotopes. Since s‐process Zr and Mo are coupled in mainstream SiC grains, these distinct s‐process variations might be due to SiC grain depletion in the analyzed materials, potentially caused by incomplete sample digestion, because the Ryugu samples were dissolved on a hotplate only to avoid high blank levels for other elements (e.g., Cr). However, local depletion of SiC grains cannot be excluded. An alternative, equally possible scenario is that aqueous alteration redistributed anomalous, s‐process‐depleted, Zr on a local scale, for example, into Ca‐phosphates or phyllosilicates.
  • Fridolin Spitzer, Thorsten Kleine, Christoph Burkhardt, Timo Hopp, 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, Kouki Kitajima, Shintaro Komatani, Alexander N. Krot, Ming-Chang Liu, Yuki Masuda, Mayu Morita, Fréderic Moynier, Kazuko Motomura, Izumi Nakai, Kazuhide Nagashima, 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
    Science Advances 10(39) 2024年9月27日  
    The isotopic compositions of samples returned from Cb-type asteroid Ryugu and Ivuna-type (CI) chondrites are distinct from other carbonaceous chondrites, which has led to the suggestion that Ryugu/CI chondrites formed in a different region of the accretion disk, possibly around the orbits of Uranus and Neptune. We show that, like for Fe, Ryugu and CI chondrites also have indistinguishable Ni isotope anomalies, which differ from those of other carbonaceous chondrites. We propose that this unique Fe and Ni isotopic composition reflects different accretion efficiencies of small FeNi metal grains among the carbonaceous chondrite parent bodies. The CI chondrites incorporated these grains more efficiently, possibly because they formed at the end of the disk’s lifetime, when planetesimal formation was also triggered by photoevaporation of the disk. Isotopic variations among carbonaceous chondrites may thus reflect fractionation of distinct dust components from a common reservoir, implying CI chondrites/Ryugu may have formed in the same region of the accretion disk as other carbonaceous chondrites.
  • Bradley De Gregorio, George D. Cody, Rhonda M. Stroud, A. L. David Kilcoyne, Scott Sandford, Corentin Le Guillou, Larry R. Nittler, Jens Barosch, Hikaru Yabuta, Zita Martins, Yoko Kebukawa, Taiga Okumura, Minako Hashiguchi, Shohei Yamashita, Yasuo Takeichi, Yoshio Takahashi, Daisuke Wakabayashi, Cécile Engrand, Laure Bejach, Lydie Bonal, Eric Quirico, Laurent Remusat, Jean Duprat, Maximilien Verdier-Paoletti, Smail Mostefaoui, Mutsumi Komatsu, Jérémie Mathurin, Alexandre Dazzi, Ariane Deniset-Besseau, Emmanuel Dartois, Yusuke Tamenori, Hiroki Suga, Gilles Montagnac, Kanami Kamide, Miho Shigenaka, Megumi Matsumoto, Yuma Enokido, 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, Hisayoshi Yurimoto, Tomoki Nakamura, Takaaki Noguchi, Ryuji Okazaki, Hiroshi Naraoka, Kanako Sakamoto, Shogo Tachibana, Sei-ichiro Watanabe, Yuichi Tsuda
    Nature Communications 15 7488 2024年8月29日  査読有り
    Abstract Primordial carbon delivered to the early earth by asteroids and meteorites provided a diverse source of extraterrestrial organics from pre-existing simple organic compounds, complex solar-irradiated macromolecules, and macromolecules from extended hydrothermal processing. Surface regolith collected by the Hayabusa2 spacecraft from the carbon-rich asteroid 162173 Ryugu present a unique opportunity to untangle the sources and processing history of carbonaceous matter. Here we show carbonaceous grains in Ryugu can be classified into three main populations defined by spectral shape: Highly aromatic (HA), Alkyl-Aromatic (AA), and IOM-like (IL). These carbon populations may be related to primordial chemistry, since C and N isotopic compositions vary between the three groups. Diffuse carbon is occasionally dominated by molecular carbonate preferentially associated with coarse-grained phyllosilicate minerals. Compared to related carbonaceous meteorites, the greater diversity of organic functional chemistry in Ryugu indicate the pristine condition of these asteroid samples.
  • Hiroharu Yui, Shu-hei Urashima, Morihiko Onose, Mayu Morita, Shintaro Komatani, Izumi Nakai, Yoshinari Abe, Yasuko Terada, Hisashi Homma, Kazuko Motomura, Kiyohiro Ichida, Tetsuya Yokoyama, Kazuhide Nagashima, 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, Wataru Fujiya, Ryota Fukai, Ikshu Gautam, Makiko K. Haba, Yuki Hibiya, Hiroshi Hidaka, Peter Hoppe, Gary R. Huss, Tsuyoshi Iizuka, Trevor R. Ireland, Akira Ishikawa, Shoichi Itoh, Noriyuki Kawasaki, Noriko T. Kita, Kouki Kitajima, Thorsten Kleine, Sasha Krot, Ming-Chang Liu, Yuki Masuda, Frédéric Moynier, Ann Nguyen, Larry Nittler, Andreas Pack, Changkun Park, Laurette Piani, Liping Qin, Tommaso Di Rocco, Sara S. Russell, Naoya Sakamoto, Maria Schönbächler, Lauren Tafla, Haolan Tang, Kentaro Terada, Tomohiro Usui, Sohei Wada, Meenakshi Wadhwa, Richard J. Walker, Katsuyuki Yamashita, Qing-Zhu Yin, Shigekazu Yoneda, Edward D. Young, 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
    Geochimica et Cosmochimica Acta 379 172-183 2024年8月  
  • Yoshinori Takano, Hiroshi Naraoka, Jason P. Dworkin, Toshiki Koga, Kazunori Sasaki, Hajime Sato, Yasuhiro Oba, Nanako O. Ogawa, Toshihiro Yoshimura, Kenji Hamase, Naohiko Ohkouchi, Eric T. Parker, José C. Aponte, Daniel P. Glavin, Yoshihiro Furukawa, Junken Aoki, Kuniyuki Kano, Shin Ichiro M. Nomura, Francois Regis Orthous-Daunay, Philippe Schmitt-Kopplin, 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, Shogo Tachibana
    Nature communications 15(1) 5708 2024年7月10日  
    We report primordial aqueous alteration signatures in water-soluble organic molecules from the carbonaceous asteroid (162173) Ryugu by the Hayabusa2 spacecraft of JAXA. Newly identified low-molecular-weight hydroxy acids (HO-R-COOH) and dicarboxylic acids (HOOC-R-COOH), such as glycolic acid, lactic acid, glyceric acid, oxalic acid, and succinic acid, are predominant in samples from the two touchdown locations at Ryugu. The quantitative and qualitative profiles for the hydrophilic molecules between the two sampling locations shows similar trends within the order of ppb (parts per billion) to ppm (parts per million). A wide variety of structural isomers, including α- and β-hydroxy acids, are observed among the hydrophilic molecules. We also identify pyruvic acid and dihydroxy and tricarboxylic acids, which are biochemically important intermediates relevant to molecular evolution, such as the primordial TCA (tricarboxylic acid) cycle. Here, we find evidence that the asteroid Ryugu samples underwent substantial aqueous alteration, as revealed by the presence of malonic acid during keto-enol tautomerism in the dicarboxylic acid profile. The comprehensive data suggest the presence of a series for water-soluble organic molecules in the regolith of Ryugu and evidence of signatures in coevolutionary aqueous alteration between water and organics in this carbonaceous asteroid.

MISC

 499
  • 岡田達明, 岡田達明, 田中智, 坂谷尚哉, 嶌生有理, 石崎拓也, 吉川真, 竹内央, 山本幸生, 荒井武彦, 千秋博紀, 出村裕英, 関口朋彦, 神山徹, 金丸仁明
    日本地球惑星科学連合大会予稿集(Web) 2023 2023年  
  • 田中智, 三桝裕也, 神山徹, 坂谷尚哉, 北里宏平, 鎌田俊一, 平林正稔, 中澤暁, 吉川真, 津田雄一
    宇宙科学技術連合講演会講演集(CD-ROM) 67th 2023年  
  • 吉川真, 田中智, 平林正稔, 三桝裕也, 佐伯孝尚, 中澤暁, 津田雄一
    宇宙科学技術連合講演会講演集(CD-ROM) 67th 2023年  
  • 奥村真一郎, 柳沢俊史, 大澤亮, 酒向重行, 紅山仁, 高橋英則, 吉田二美, 吉川真, 浦川聖太郎, 阿部新助
    宇宙科学技術連合講演会講演集(CD-ROM) 67th 2023年  
  • Jens Barosch, Larry R. Nittler, Jianhua Wang, Conel M. O'D. Alexander, Bradley T. De Gregorio, Cécile Engrand, Yoko Kebukawa, Kazuhide Nagashima, Rhonda M. Stroud, Hikaru Yabuta, Yoshinari Abe, Jérôme Aléon, Sachiko Amari, Yuri Amelin, Ken-ichi Bajo, Laure Bejach, Martin Bizzarro, Lydie Bonal, Audrey Bouvier, Richard W. Carlson, Marc Chaussidon, Byeon-Gak Choi, George D. Cody, Emmanuel Dartois, Nicolas Dauphas, Andrew M. Davis, Alexandre Dazzi, Ariane Deniset-Besseau, Tommaso Di Rocco, Jean Duprat, Wataru Fujiya, Ryota Fukai, Ikshu Gautam, Makiko K. Haba, Minako Hashiguchi, Yuki Hibiya, Hiroshi Hidaka, Hisashi Homma, Peter Hoppe, Gary R. Huss, Kiyohiro Ichida, Tsuyoshi Iizuka, Trevor R. Ireland, Akira Ishikawa, Motoo Ito, Shoichi Itoh, Kanami Kamide, Noriyuki Kawasaki, A. L. David Kilcoyne, Noriko T. Kita, Kouki Kitajima, Thorsten Kleine, Shintaro Komatani, Mutsumi Komatsu, Alexander N. Krot, Ming-Chang Liu, Zita Martins, Yuki Masuda, Jérémie Mathurin, Kevin D. McKeegan, Gilles Montagnac, Mayu Morita, Smail Mostefaoui, Kazuko Motomura, Frédéric Moynier, Izumi Nakai, Ann N. Nguyen, Takuji Ohigashi, Taiga Okumura, Morihiko Onose, Andreas Pack, Changkun Park, Laurette Piani, Liping Qin, Eric Quirico, Laurent Remusat, Sara S. Russell, Naoya Sakamoto, Scott A. Sandford, Maria Schönbächler, Miho Shigenaka, Hiroki Suga, Lauren Tafla, Yoshio Takahashi, Yasuo Takeichi, Yusuke Tamenori, Haolan Tang, Kentaro Terada, Yasuko Terada, Tomohiro Usui, Maximilien Verdier-Paoletti, Sohei Wada, Meenakshi Wadhwa, Daisuke Wakabayashi, Richard J. Walker, Katsuyuki Yamashita, Shohei Yamashita, Qing-Zhu Yin, Tetsuya Yokoyama, Shigekazu Yoneda, Edward D. Young, Hiroharu Yui, Ai-Cheng Zhang, Masanao Abe, Akiko Miyazaki, Aiko Nakato, Satoru Nakazawa, Masahiro Nishimura, Tatsuaki Okada, Takanao Saiki, Satoshi Tanaka, Fuyuto Terui, Yuichi Tsuda, Sei-ichiro Watanabe, Toru Yada, Kasumi Yogata, Makoto Yoshikawa, Tomoki Nakamura, Hiroshi Naraoka, Takaaki Noguchi, Ryuji Okazaki, Kanako Sakamoto, Shogo Tachibana, Hisayoshi Yurimoto
    ASTROPHYSICAL JOURNAL LETTERS 935(1) 2022年8月16日  
    We have conducted a NanoSIMS-based search for presolar material in samples recently returned from C-type asteroid Ryugu as part of JAXA's Hayabusa2 mission. We report the detection of all major presolar grain types with O- and C-anomalous isotopic compositions typically identified in carbonaceous chondrite meteorites: 1 silicate, 1 oxide, 1 O-anomalous supernova grain of ambiguous phase, 38 SiC, and 16 carbonaceous grains. At least two of the carbonaceous grains are presolar graphites, whereas several grains with moderate C isotopic anomalies are probably organics. The presolar silicate was located in a clast with a less altered lithology than the typical extensively aqueously altered Ryugu matrix. The matrix-normalized presolar grain abundances in Ryugu are 4.8$^{+4.7}_{-2.6}$ ppm for O-anomalous grains, 25$^{+6}_{-5}$ ppm for SiC grains and 11$^{+5}_{-3}$ ppm for carbonaceous grains. Ryugu is isotopically and petrologically similar to carbonaceous Ivuna-type (CI) chondrites. To compare the in situ presolar grain abundances of Ryugu with CI chondrites, we also mapped Ivuna and Orgueil samples and found a total of SiC grains and 6 carbonaceous grains. No O-anomalous grains were detected. The matrix-normalized presolar grain abundances in the CI chondrites are similar to those in Ryugu: 23 $^{+7}_{-6}$ ppm SiC and 9.0$^{+5.3}_{-4.6}$ ppm carbonaceous grains. Thus, our results provide further evidence in support of the Ryugu-CI connection. They also reveal intriguing hints of small-scale heterogeneities in the Ryugu samples, such as locally distinct degrees of alteration that allowed the preservation of delicate presolar material.
  • 矢田 達, 安部 正真, 岡田 達明, 中藤 亜衣子, 与賀田 佳澄, 宮﨑 明子, 西村 征洋, 坂本 佳奈子, 畠田 健太朗, 熊谷 和也, 古屋 静萌, 岩前 絢子, 吉武 美和, 人見 勇矢, 副島 広道, 長島 加奈, 金丸 礼, 山本 大貴, 林 佑, 深井 稜汰, 管原 春菜, 鈴木 志野, 橘 省吾, 臼井 寛裕, 圦本 尚義, 藤本 正樹, 澤田 弘崇, 岡崎 隆司, 高野 淑識, 三浦 弥生, 矢野 創, Trevor Ireland, 杉田 精司, 長 勇一郎, 湯本 航生, 矢部 佑奈, 森 晶輝, Jean-Pierre Bibring, Cedric Pilorget, Rosario Brunetto, Lucie Riu, Damian Loizeau, Lionel Lourit, Vincent Hamm, 中澤 暁, 田中 智, 佐伯 孝尚, 吉川 真, 渡邊 誠一郎, 津田 雄一
    遊・星・人 = Planetary people : 日本惑星科学会誌 31(2) 153-164 2022年6月  
  • 吉川真, 安部正真, 池永敏憲, 岩城陽大, 岡田達明, 菊地耕一, 黒崎裕久, 黒田信介, 佐伯孝尚, 嶌生有理, 津田雄一, 西山和孝, 三桝裕也, 柳沢俊史
    日本地球惑星科学連合大会予稿集(Web) 2022 2022年  
  • 紅山仁, 酒向重行, 大澤亮, 瀧田怜, 奥村真一郎, 浦川聖太郎, 吉川真, 臼井文彦, 吉田二美, 吉田二美, 前原裕之
    日本天文学会年会講演予稿集 2022 2022年  
  • 紅山仁, 酒向重行, 大澤亮, 大澤亮, 瀧田怜, 奥村真一郎, 浦川聖太郎, 吉川真, 臼井文彦, 吉田二美, 吉田二美, 前原裕之
    日本惑星科学会秋季講演会予稿集(Web) 2022 2022年  
  • 奥村真一郎, 柳沢俊史, 大澤亮, 大澤亮, 吉川真, 吉田二美, 酒向重行, 紅山仁, 高橋英則, 浦川聖太郎
    日本惑星科学会秋季講演会予稿集(Web) 2022 2022年  
  • 柳沢俊史, 黒崎裕久, CEGARRAPOLO Manuel, 吉川真, 平子敬一, 大澤亮, 酒向重行, 吉田二美, 奥村真一郎
    宇宙科学技術連合講演会講演集(CD-ROM) 66th 2022年  
  • 紅山仁, 酒向重行, 大澤亮, 瀧田怜, 小林尚人, 奥村真一郎, 浦川聖太郎, 吉川真, 臼井文彦, 吉田二美, 吉田二美
    宇宙科学技術連合講演会講演集(CD-ROM) 66th 2022年  
  • 紅山仁, 紅山仁, 酒向重行, 大澤亮, 瀧田怜, 小林尚人, 奥村真一郎, 浦川聖太郎, 吉川真, 臼井文彦, 臼井文彦, 吉田二美, 吉田二美
    日本惑星科学会誌 遊・星・人 31(4) 2022年  
  • 尾崎直哉, 高尾勇輝, 兵頭龍樹, 嶌生有理, 笠原慧, 長福紳太郎, 鵜飼諭史, 久本泰慶, 筒井真輝, 小塚陽希, 河北秀世, 脇田茂, 岡田達明, 吉川真, 稲富裕光, 津田雄一, 船瀬龍, 川勝康弘, 藤本正樹
    宇宙科学技術連合講演会講演集(CD-ROM) 66th 2022年  
  • 岡田達明, 田中智, 坂谷尚哉, 嶌生有理, 石崎拓也, 吉川真, 竹内央, 山本幸生, 千秋博紀, 荒井武彦, 出村裕英, 関口朋彦, 神山徹, 金丸仁明
    宇宙科学技術連合講演会講演集(CD-ROM) 66th 2022年  
  • 佐藤雅彦, 木村勇気, 田中智, 畠山唯達, 杉田精司, 中村智樹, 橘省吾, 奥住聡, 渡邊誠一郎, 圦本尚義, 野口高明, 岡崎隆司, 薮田ひかる, 奈良岡浩, 坂本佳奈子, 矢田達, 西村征洋, 中藤亜衣子, 宮崎明子, 与賀田佳澄, 安部正真, 岡田達明, 臼井寛裕, 吉川真, 佐伯孝尚, 照井冬人, 中澤暁, 津田雄一
    日本惑星科学会秋季講演会予稿集(Web) 2022 2022年  
  • 三浦昭, 井藤良幸, 内野康司, 中澤哲明, 筒井芳典, 筒井芳典, 北野和宏, 北野和宏, 松尾建, 武井悠人, 尾川順子, 横田康弘, 生田ちさと, 吉川真, 津田雄一
    宇宙航空研究開発機構研究開発報告 JAXA-RR-(Web) (21-008) 2022年  
  • 吉川真
    ふぇらむ 26(7) 6-15 2021年7月  査読有り招待有り筆頭著者
  • Daisuke Kuroda, Jooyeon Geem, Hiroshi Akitaya, Sunho Jin, Jun Takahashi, Koki Takahashi, Hiroyuki Naito, Kana Makino, Tomohiko Sekiguchi, Yoonsoo P. Bach, Jinguk Seo, Shuji Sato, Hiroshi Sasago, Koji S. Kawabata, Aoi Kawakami, Miyako Tozuka, Makoto Watanabe, Seiko Takagi, Kiyoshi Kuramoto, Makoto Yoshikawa, Sunao Hasegawa, Masateru Ishiguro
    2021年1月22日  
    The asteroid exploration project "Hayabusa2" has successfully returned samples from the asteroid (162173) Ryugu. In this study, we measured the linear polarization degrees of Ryugu using four ground-based telescopes from 2020 September 27 to December 25, covering a wide-phase angle (Sun-target-observer's angle) range from 28$^\circ$ to 104$^\circ$. We found that the polarization degree of Ryugu reached 53$\%$ around a phase angle of 100$^\circ$, the highest value among all asteroids and comets thus far reported. The high polarization degree of Ryugu can be attributed to the scattering properties of its surface layers, in particular the relatively small contribution of multiply-scattered light. Our polarimetric results indicate that Ryugu's surface is covered with large grains. On the basis of a comparison with polarimetric measurements of pulverized meteorites, we can infer the presence of submillimeter-sized grains on the surface layer of Ryugu. We also conjecture that this size boundary represents the grains that compose the aggregate. It is likely that a very brittle structure has been lost in the recovered samples, although they may hold a record of its evolution. Our data will be invaluable for future experiments aimed at reproducing the surface structure of Ryugu.
  • 紅山仁, 酒向重行, 大澤亮, 瀧田怜, 小林尚人, 奥村真一郎, 浦川聖太郎, 吉川真, 臼井文彦, 吉田二美, 吉田二美
    日本天文学会年会講演予稿集 2021 2021年  
  • 紅山仁, 酒向重行, 大澤亮, 瀧田怜, 小林尚人, 奥村真一郎, 浦川聖太郎, 吉川真, 臼井文彦, 吉田二美, 吉田二美
    日本惑星科学会秋季講演会予稿集(Web) 2021 2021年  
  • 大澤亮, 酒向重行, 紅山仁, 諸隈智貴, 浦川聖太郎, 奥村真一郎, 渡部潤一, 柳沢俊史, 黒崎裕久, 吉川真
    宇宙航空研究開発機構特別資料 JAXA-SP-(Web) (21-001) 2021年  
  • 紅山仁, 酒向重行, 大澤亮, 瀧田怜, 小林尚人, 奥村真一郎, 浦川聖太郎, 臼井文彦, 吉田二美, 吉田二美, 吉川真
    日本地球惑星科学連合大会予稿集(Web) 2021 2021年  
  • 吉川 真
    日本呼吸ケア・リハビリテーション学会誌 31 69s_1-69s_1 2021年  
  • 津田雄一, 佐伯孝尚, 中澤暁, 吉川真, 渡邊誠一郎
    宇宙科学技術連合講演会講演集(CD-ROM) 65th 2021年  
  • 津田雄一, 中澤暁, 吉川真, 佐伯孝尚, 渡邊誠一郎
    日本地球惑星科学連合大会予稿集(Web) 2021 2021年  
  • 武井悠人, 佐伯孝尚, 三桝裕也, 中澤暁, 下村純人, 田中智, 西山和孝, 吉川真, 津田雄一
    宇宙科学技術連合講演会講演集(CD-ROM) 65th 2021年  
  • 吉川真, TASKER Elizabeth, 細田聡史, 松岡萌, 武井悠人, 三桝裕也, 伊佐百加, 中澤暁, 津田雄一
    日本天文学会年会講演予稿集 2021 2021年  
  • 矢田達, 安部正真, 安部正真, 岡田達明, 岡田達明, 中藤亜衣子, 与賀田佳澄, 宮崎明子, 熊谷和也, 畠田健太朗, 西村征洋, 人見勇矢, 副島広道, 吉武美和, 吉武美和, 岩前絢子, 岩前絢子, 古屋静萌, 古屋静萌, 臼井寛裕, 林佑, 山本大貴, 深井稜汰, 杉田精司, 長勇一郎, 湯本航生, 矢部佑奈, BIBRING Jean-Pierre, PILORGET Cedric, HAMM Vincent, BRUNETTO Rosario, RIU Lucie, RIU Lucie, 橘省吾, 橘省吾, 澤田弘崇, 岡崎隆司, 高野淑識, 坂本佳奈子, 三浦弥生, 矢野創, IRELAND Trevor, 山田哲哉, 藤本正樹, 中澤暁, 田中智, 佐伯孝尚, 吉川真, 渡邊誠一郎, 津田雄一
    日本惑星科学会秋季講演会予稿集(Web) 2021 2021年  
  • 尾川順子, 佐伯孝尚, 武井悠人, 高橋忠輝, 藤井淳, 菊地翔太, 照井冬人, 三桝裕也, 大野剛, 吉川健人, 田中智, 吉川真, 中澤暁, 津田雄一
    宇宙科学技術連合講演会講演集(CD-ROM) 65th 2021年  
  • 佐伯孝尚, 武井悠人, 三桝裕也, 藤井淳, 竹内央, 吉川健人, 山田哲哉, 吉原圭介, 吉川真, 中澤暁, 津田雄一, 菊地翔太, 照井冬人
    宇宙科学技術連合講演会講演集(CD-ROM) 65th 2021年  
  • 三桝裕也, 菊地翔太, 武井悠人, 佐伯孝尚, 田中智, 西山和孝, 竹内央, 吉川真, 中澤暁, 津田雄一
    宇宙科学技術連合講演会講演集(CD-ROM) 65th 2021年  
  • 吉川真, 渡邊誠一郎, 杉田精司, 並木則行, 北里宏平, 田中智, 荒川政彦, 橘省吾, 岡田達明, 出村裕英, 池田人, 石黒正晃, 山本幸生, 藤田和央, 安部正真, 臼井寛裕, JAUMANN Ralf, BIBRING Jean-Pierre, GROTT Matthias, GLASSMEIER Karl-Heinz, HELBERT Joern, HO Tra-Mi, SOFFYS Aurelie Moussi, 中澤暁, 津田雄一
    宇宙科学技術連合講演会講演集(CD-ROM) 65th 2021年  
  • 吉川 真, はやぶさ2プロジェクトチーム, YOSHIKAWA Makoto, Hayabusa2 Project Team
    宇宙教育研究 = Research on Space Education (1) 68-78 2020年7月7日  
  • Kikuchi Shota, Watanabe Sei-ichiro, Watanabe Sei-ichiro, Saiki Takanao, Yabuta Hikaru, Sugita Seiji, Sugita Seiji, Sugita Seiji, Morota Tomokatsu, Morota Tomokatsu, Hirata Naru, Hirata Naoyuki, Michikami Tatsuhiro, Honda Chikatoshi, Yokota Yashuhiro, Honda Rie, Sakatani Naoya, Sakatani Naoya, Okada Tatsuaki, Shimaki Yuri, Matsumoto Koji, Noguchi Rina, Takei Yuto, Terui Fuyuto, Ogawa Naoko, Yoshikawa Kent, Ono Go, Mimasu Yuya, Sawada Hirotaka, Ikeda Hitoshi, Hirose Chikako, Takahashi Tadateru, Takahashi Tadateru, Fujii Atsushi, Yamaguchi Tomohiro, Yamaguchi Tomohiro, Ishihara Yoshiaki, Ishihara Yoshiaki, Nakamura Tomoki, Kitazato Kohei, Wada Koji, Tachibana Shogo, Tachibana Shogo, Tatsumi Eri, Tatsumi Eri, Matsuoka Moe, Senshu Hiroki, Kameda Shingo, Kouyama Toru, Yamada Manabu, Shirai Kei, Shirai Kei, Cho Yuichiro, Ogawa Kazunori, Ogawa Kazunori, Yamamoto Yukio, Miura Akira, Iwata Takahiro, Namiki Noriyuki, Hayakawa Masahiko, Abe Masanao, Tanaka Satoshi, Yoshikawa Makoto, Nakazawa Satoru, Tsuda Yuichi
    Space Science Reviews 216(7) 2020年  
  • 荒井朋子, 小林正規, 石橋高, 吉田二美, 吉田二美, 木村宏, 平井隆之, 洪鵬, 山田学, 千秋博紀, 和田浩二, SRAMA Ralf, KRUEGER Harald, 今村裕志, 豊田裕之, 西山和孝, 高島建, 佐々木晶, 薮田ひかる, 石黒正晃, 渡部潤一, 伊藤孝士, 大坪貴文, 大塚勝仁, 阿部新助, 中村智樹, 小林詩歩, 廣井孝弘, 中村メッセンジャー圭子, 小松睦美, 関口朋彦, 浦川聖太郎, 木下大輔, 橘省吾, 三河内岳, 諸田智克, 野口高明, 金田英宏, 矢野創, 吉川真, 岡本尚也, 中藤亜衣子, 柳沢俊史, 黒崎裕久, 小松吾郎, 小松吾郎, 出村裕英, 平田成, 伊藤元雄, 松浦周二
    日本惑星科学会秋季講演会予稿集(Web) 2020 2020年  
  • 渡邊誠一郎, 田中智, 吉川真, 杉田精司, 岡田達明, 北里宏平, 竝木則行, 荒川政彦, 橘省吾, 橘省吾, 諸田智克, 杉浦圭祐, 嶌生有理, 平田成, 平田直之
    日本惑星科学会秋季講演会予稿集(Web) 2020 2020年  
  • 佐々木晶, 神田志穂, 菊地紘, 道上達広, 諸田智克, 本田親寿, 宮本英昭, 逸見良道, 杉田精司, 巽瑛理, 渡邊誠一郎, 竝木則行, 平林正稔, 平田成, 中村智樹, 野口高明, 廣井孝弘, 松本晃治, 野田寛大, 坂谷尚哉, 亀田真吾, 神山徹, 鈴木秀彦, 山田学, 本田理恵, 横田康弘, 長勇一郎, 吉岡和夫, 早川雅彦, 松岡萌, 金丸仁明, 澤田弘崇, 吉川真
    日本惑星科学会秋季講演会予稿集(Web) 2020 2020年  
  • 紅山仁, 酒向重行, 大澤亮, 諸隈智貴, 小林尚人, 奥村真一郎, 浦川聖太郎, 吉川真, 柳沢俊史, 佐藤英貴
    日本天文学会年会講演予稿集 2020 2020年  
  • 紅山仁, 酒向重行, 大澤亮, 諸隈智貴, 瀧田怜, 小林尚人, 奥村真一郎, 浦川聖太郎, 吉川真, 柳沢俊史, 黒崎裕久, 吉田二美, 吉田二美, 佐藤英貴
    日本惑星科学会秋季講演会予稿集(Web) 2020 2020年  
  • 吉川真
    日本病院総合診療医学会雑誌 16 2020年  
  • 大澤亮, 酒向重行, 小島悠人, 奥村真一郎, 浦川聖太郎, 柳沢俊史, 吉川真
    宇宙航空研究開発機構特別資料 JAXA-SP-(Web) (18-011) 2019年  
  • YABUTA Hikaru, WATANABE Sei-ichiro, NAKAMURA Tomoki, HIRATA Naru, SUGITA Seiji, OKADA Tatsuaki, KITAZATO Kohei, ISHIHARA Yoshiaki, MOROTA Tomokatsu, SAKATANI Naoya, MATSUMOTO Koji, WADA Koji, TACHIBANA Shogo, KOMATSU Mutsumi, TATSUMI Eri, MATSUOKA Moe, HONDA Chikatoshi, HIROI Takahiro, SENSHU Hiroki, HONDA Rie, YOKOTA Yasuhiro, NOGUCHI Rina, SHIMAKI Yuri, DOMINGUE Deborah Lorin, LE CORRE Lucille, BARUCCI Antonella, PALOMBA Ernest, KIKUCHI Shota, MIURA Akira, YAMAGUCHI Tomohiro, YAMAMOTO Yukio, SAIKI Takanao, TANAKA Satoshi, YOSHIKAWA Makoto, TSUDA Yuichi
    日本地球惑星科学連合大会予稿集(Web) 2019 2019年  
  • 酒向重行, 大澤亮, 高橋英則, 土居守, 小林尚人, 本原顕太郎, 諸隈智貴, 小西真広, 一木真, 有馬宣明, 森田雅大, 紅山仁, 青木勉, 征矢野隆夫, 樽澤賢一, 森由貴, 中田好一, 茂山俊和, 臼井文彦, 渡部潤一, 山下卓也, 前原裕之, 春日敏測, 有松亘, 冨永望, 猿楽祐樹, 田中雅臣, 板由房, 小久保充, 吉川真, 奥村真一郎, 浦川聖太郎, 池田思朗, 森井幹雄, 佐藤幹哉
    日本天文学会年会講演予稿集 2019 2019年  
  • 浦川聖太郎, 大澤亮, 酒向重行, 奥村真一郎, 櫻井友里, 高橋隼, 今村和義, 内藤博之, 渡辺文健, 永吉竜馬, 村上恭彦, 岡崎良, 関口朋彦, 石黒正晃, 道上達広, 吉川真
    日本惑星科学会秋季講演会予稿集(Web) 2019 2019年  
  • 渡邊誠一郎, 渡邊誠一郎, 吉川真, 田中智, 杉田精司, 竝木則行, 岡田達明, 北里宏平, 橘省吾, 橘省吾, 荒川政彦, 池田人, 石黒正晃
    日本惑星科学会秋季講演会予稿集(Web) 2019 2019年  
  • 野口 里奈, 平田 成, 本田 親寿, 出村 裕英, 杉田 精司, 津田 雄一, はやぶさ2プロジェクトチーム, 嶌生 有理, 吉川 真, 宮本 英昭, 小松 吾郎, 渡邊 誠一郎, 石原 吉明, 佐々木 晶, 平林 正俊
    日本惑星科学会誌遊星人 28(1) 80-86 2019年  
    <p>リュウグウ表面の地名が国際天文学連合(IAU)のDivision F(Planetary System and Bioastronomy)のWorking Group for Planetary System Nomenclature(以降,国際天文学連合ワーキンググループ)で審議され,2018年の年末に承認された.ここでは地名の紹介と決定までの経緯について紹介する.</p>
  • 吉川真, 津田雄一, 中澤暁, 照井冬人, 佐伯孝尚, 田中智, 岡田達明, 池田人, 渡邊誠一郎, 杉田精司, 橘省吾, 並木則行, 北里宏平, 荒川政彦
    日本天文学会年会講演予稿集 2019 2019年  
  • 吉川真
    構造物の安全性および信頼性(CD-ROM) 9 2019年  

書籍等出版物

 19

講演・口頭発表等

 32

担当経験のある科目(授業)

 8

共同研究・競争的資金等の研究課題

 15

学術貢献活動

 3

社会貢献活動

 2

メディア報道

 2