Abstract
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(-2.6)(+4.7) ppm for O-anomalous grains, 25(-)(5)(+)(6) ppm for SiC grains, and 11(-3)(+5) 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 15 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(-6)(+7) ppm SiC and 9.0 (+5.4)(-3)(.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.
| Original language | English |
|---|---|
| Article number | L3 |
| Journal | Astrophysical Journal Letters |
| Volume | 935 |
| Issue number | 1 |
| Number of pages | 12 |
| ISSN | 2041-8205 |
| DOIs | |
| Publication status | Published - 2022 |
Keywords
- SILICATE GRAINS
- OXIDE GRAINS
- ABUNDANCES
- SYSTEMATICS
- CHONDRITES
- MAGNESIUM
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Presolar Stardust in Asteroid Ryugu. / Barosch, Jens; Nittler, Larry R.; Wang, Jianhua; Alexander, Conel M. O'D.; De Gregorio, Bradley T.; Engrand, Cécile; Kebukawa, Yoko; Nagashima, Kazuhide; Stroud, Rhonda M.; Yabuta, Hikaru; Abe, Yoshinari; Aléon, Jérôme; Amari, Sachiko; Amelin, Yuri; Bajo, Ken-ichi; Bejach, Laure; Bizzarro, Martin; Bonal, Lydie; Bouvier, Audrey; Carlson, Richard W.; Chaussidon, Marc; Choi, Byeon-Gak; Cody, George D.; Dartois, Emmanuel; Dauphas, Nicolas; Davis, Andrew M.; Dazzi, Alexandre; Deniset-Besseau, Ariane; Di Rocco, Tommaso; Duprat, Jean; Fujiya, Wataru; Fukai, Ryota; Gautam, Ikshu; Haba, Makiko K.; Hashiguchi, Minako; Hibiya, Yuki; Hidaka, Hiroshi; Homma, Hisashi; Hoppe, Peter; Huss, Gary R.; Ichida, Kiyohiro; Iizuka, Tsuyoshi; Ireland, Trevor R.; Ishikawa, Akira; Ito, Motoo; Itoh, Shoichi; Kamide, Kanami; Kawasaki, Noriyuki; Kilcoyne, A. L. David; Kita, Noriko T.; Kitajima, Kouki; Kleine, Thorsten; Komatani, Shintaro; Komatsu, Mutsumi; Krot, Alexander N.; Liu, Ming-Chang; Martins, Zita; Masuda, Yuki; Mathurin, Jérémie; McKeegan, Kevin D.; Montagnac, Gilles; Morita, Mayu; Mostefaoui, Smail; Motomura, Kazuko; Moynier, Frédéric; Nakai, Izumi; Nguyen, Ann N.; Ohigashi, Takuji; Okumura, Taiga; Onose, Morihiko; Pack, Andreas; Park, Changkun; Piani, Laurette; Qin, Liping; Quirico, Eric; Remusat, Laurent; Russell, Sara S.; Sakamoto, Naoya; Sandford, Scott A.; Schönbächler, Maria; Shigenaka, Miho; Suga, Hiroki; Tafla, Lauren; Takahashi, Yoshio; Takeichi, Yasuo; Tamenori, Yusuke; Tang, Haolan; Terada, Kentaro; Terada, Yasuko; Usui, Tomohiro; Verdier-Paoletti, Maximilien; Wada, Sohei; Wadhwa, Meenakshi; Wakabayashi, Daisuke; Walker, Richard J.; Yamashita, Katsuyuki; Yamashita, Shohei; Yin, Qing-Zhu; Yokoyama, Tetsuya; Yoneda, Shigekazu; Young, Edward D.; Yui, Hiroharu; Zhang, Ai-Cheng; Abe, Masanao; Miyazaki, Akiko; Nakato, Aiko; Nakazawa, Satoru; Nishimura, Masahiro; Okada, Tatsuaki; Saiki, Takanao; Tanaka, Satoshi; Terui, Fuyuto; Tsuda, Yuichi; Watanabe, Sei-ichiro; Yada, Toru; Yogata, Kasumi; Yoshikawa, Makoto; Nakamura, Tomoki; Naraoka, Hiroshi; Noguchi, Takaaki; Okazaki, Ryuji; Sakamoto, Kanako; Tachibana, Shogo; Yurimoto, Hisayoshi.
In: Astrophysical Journal Letters, Vol. 935, No. 1, L3, 2022.Research output: Contribution to journal › Journal article › Research › peer-review
}
TY - JOUR
T1 - Presolar Stardust in Asteroid Ryugu
AU - Barosch, Jens
AU - Nittler, Larry R.
AU - Wang, Jianhua
AU - Alexander, Conel M. O'D.
AU - De Gregorio, Bradley T.
AU - Engrand, Cécile
AU - Kebukawa, Yoko
AU - Nagashima, Kazuhide
AU - Stroud, Rhonda M.
AU - Yabuta, Hikaru
AU - Abe, Yoshinari
AU - Aléon, Jérôme
AU - Amari, Sachiko
AU - Amelin, Yuri
AU - Bajo, Ken-ichi
AU - Bejach, Laure
AU - Bizzarro, Martin
AU - Bonal, Lydie
AU - Bouvier, Audrey
AU - Carlson, Richard W.
AU - Chaussidon, Marc
AU - Choi, Byeon-Gak
AU - Cody, George D.
AU - Dartois, Emmanuel
AU - Dauphas, Nicolas
AU - Davis, Andrew M.
AU - Dazzi, Alexandre
AU - Deniset-Besseau, Ariane
AU - Di Rocco, Tommaso
AU - Duprat, Jean
AU - Fujiya, Wataru
AU - Fukai, Ryota
AU - Gautam, Ikshu
AU - Haba, Makiko K.
AU - Hashiguchi, Minako
AU - Hibiya, Yuki
AU - Hidaka, Hiroshi
AU - Homma, Hisashi
AU - Hoppe, Peter
AU - Huss, Gary R.
AU - Ichida, Kiyohiro
AU - Iizuka, Tsuyoshi
AU - Ireland, Trevor R.
AU - Ishikawa, Akira
AU - Ito, Motoo
AU - Itoh, Shoichi
AU - Kamide, Kanami
AU - Kawasaki, Noriyuki
AU - Kilcoyne, A. L. David
AU - Kita, Noriko T.
AU - Kitajima, Kouki
AU - Kleine, Thorsten
AU - Komatani, Shintaro
AU - Komatsu, Mutsumi
AU - Krot, Alexander N.
AU - Liu, Ming-Chang
AU - Martins, Zita
AU - Masuda, Yuki
AU - Mathurin, Jérémie
AU - McKeegan, Kevin D.
AU - Montagnac, Gilles
AU - Morita, Mayu
AU - Mostefaoui, Smail
AU - Motomura, Kazuko
AU - Moynier, Frédéric
AU - Nakai, Izumi
AU - Nguyen, Ann N.
AU - Ohigashi, Takuji
AU - Okumura, Taiga
AU - Onose, Morihiko
AU - Pack, Andreas
AU - Park, Changkun
AU - Piani, Laurette
AU - Qin, Liping
AU - Quirico, Eric
AU - Remusat, Laurent
AU - Russell, Sara S.
AU - Sakamoto, Naoya
AU - Sandford, Scott A.
AU - Schönbächler, Maria
AU - Shigenaka, Miho
AU - Suga, Hiroki
AU - Tafla, Lauren
AU - Takahashi, Yoshio
AU - Takeichi, Yasuo
AU - Tamenori, Yusuke
AU - Tang, Haolan
AU - Terada, Kentaro
AU - Terada, Yasuko
AU - Usui, Tomohiro
AU - Verdier-Paoletti, Maximilien
AU - Wada, Sohei
AU - Wadhwa, Meenakshi
AU - Wakabayashi, Daisuke
AU - Walker, Richard J.
AU - Yamashita, Katsuyuki
AU - Yamashita, Shohei
AU - Yin, Qing-Zhu
AU - Yokoyama, Tetsuya
AU - Yoneda, Shigekazu
AU - Young, Edward D.
AU - Yui, Hiroharu
AU - Zhang, Ai-Cheng
AU - Abe, Masanao
AU - Miyazaki, Akiko
AU - Nakato, Aiko
AU - Nakazawa, Satoru
AU - Nishimura, Masahiro
AU - Okada, Tatsuaki
AU - Saiki, Takanao
AU - Tanaka, Satoshi
AU - Terui, Fuyuto
AU - Tsuda, Yuichi
AU - Watanabe, Sei-ichiro
AU - Yada, Toru
AU - Yogata, Kasumi
AU - Yoshikawa, Makoto
AU - Nakamura, Tomoki
AU - Naraoka, Hiroshi
AU - Noguchi, Takaaki
AU - Okazaki, Ryuji
AU - Sakamoto, Kanako
AU - Tachibana, Shogo
AU - Yurimoto, Hisayoshi
PY - 2022
Y1 - 2022
N2 - 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(-2.6)(+4.7) ppm for O-anomalous grains, 25(-)(5)(+)(6) ppm for SiC grains, and 11(-3)(+5) 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 15 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(-6)(+7) ppm SiC and 9.0 (+5.4)(-3)(.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.
AB - 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(-2.6)(+4.7) ppm for O-anomalous grains, 25(-)(5)(+)(6) ppm for SiC grains, and 11(-3)(+5) 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 15 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(-6)(+7) ppm SiC and 9.0 (+5.4)(-3)(.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.
KW - SILICATE GRAINS
KW - OXIDE GRAINS
KW - ABUNDANCES
KW - SYSTEMATICS
KW - CHONDRITES
KW - MAGNESIUM
U2 - 10.3847/2041-8213/ac83bd
DO - 10.3847/2041-8213/ac83bd
M3 - Journal article
VL - 935
JO - The Astrophysical Journal Letters
JF - The Astrophysical Journal Letters
SN - 2041-8205
IS - 1
M1 - L3
ER -