Presented here are the observations and interpretations from a comprehensive analysis of 16 representative particles returned from the C-type asteroid Ryugu by the Hayabusa2 mission. On average Ryugu particles consist of 50% phyllosilicate matrix, 41% porosity and 9% minor phases, including organic matter. The abundances of 70 elements from the particles are in close agreement with those of CI chondrites. Bulk Ryugu particles show higher δ18O, Δ17O, and ε54Cr values than CI chondrites. As such, Ryugu sampled the most primitive and least-thermally processed protosolar nebula reservoirs. Such a finding is consistent with multi-scale H-C-N isotopic compositions that are compatible with an origin for Ryugu organic matter within both the protosolar nebula and the interstellar medium. The analytical data obtained here, suggests that complex soluble organic matter formed during aqueous alteration on the Ryugu progenitor planetesimal (several 10’s of km), <2.6 Myr after CAI formation. Subsequently, the Ryugu progenitor planetesimal was fragmented and evolved into the current asteroid Ryugu through sublimation.
J-STAGE Articles - On the origin and evolution of the asteroid Ryugu: A comprehensive geochemical perspective https://t.co/MgZ7xDW6TB
メモ。読みたい
@OscarGenomics @Ribonucleotidic En otros papers anteriores se publica la detección de otros compuestos orgánicos, por lo menos aquí:
https://t.co/3tpOReZXoO
https://t.co/FOPWzCsoPP
Estos días se está hablando mucho sobre los #aminoácidos y resto de compuestos orgánicos detectados en el asteroide #Ryugu. Espectacular.
Aquí tenéis la tabla, comparada con la composición del meteorito #Orgueil, en dos versiones...
Artículo y Suppl Mat:
https://t.co/cJcAAEPkjq https://t.co/WtZlhk9hDK
Samples of Asteroid #Ryugu returned to Earth by the Japanese spacecraft #Hayabusa2 have been found to contain an amino acid that is essential for cooking traditional Japanese soup. https://t.co/dfV5aFDFOt
論文の末尾に(Received Jan. 31, 2022; accepted May 6, 2022) とあった。時間をかけて査読されているようだ。https://t.co/sCcq3HCGp1
“On the origin and evolution of the asteroid Ryugu: A comprehensive geochemical perspective” / “On the origin and evolution of the asteroid Ryugu: A comprehensive geochemical perspective” (1 user) https://t.co/mWZotDjYc9
https://t.co/fbkl9At4D5
https://t.co/UakmyUp9A7
Asteroid Ryugu composition from sample return
https://t.co/jjXVFam6fH
DISCLAIMER: I am not part of the analysis team (seriously. what. is. a. microscope?) and have NO SECRET INSIGHTS. This thread is from the press release and paper (open source: https://t.co/PbPAOjeNbO). Quote me as a JAXA source and I will hunt you down & feed you to bears (2/10) https://t.co/BtG9klUHVN
[原著論文]
Eizo Nakamura, et al. "On the origin and evolution of the asteroid Ryugu: A comprehensive geochemical perspective". Proceedings of The Japan Academy, Series B., 2022; 98 (6) 227-282.
https://t.co/vyhEZaZapC
@tgwkzk @tarokotani これですね、確かに アミノ酸 amino acids の記述がありますね > On the origin and evolution of the asteroid Ryugu: A comprehensive geochemical perspective DOI: 10.2183/pjab.98.015 https://t.co/7B9fdppBy3
@SMBKRHYT_kinoko これと、https://t.co/m77rQmYhyu
岡山大論文これか
https://t.co/r3yqnoyNqs
https://t.co/saxVbAvv73 On the origin and evolution of the asteroid Ryugu: A comprehensive geochemical perspectiveProc. Jpn. Acad., Ser. B 98 (2022) (Received Jan. 31, 2022; accepted May 6, 2022)
りゅうぐうの件、学士院紀要という話もあったが、こちらのもPublished: June 10, 2022でしたね。
https://t.co/6yyu29dl5J
J-STAGE Articles - On the origin and evolution of the asteroid Ryugu: A comprehensive geochemical perspective https://t.co/Ru9mgAsowh
Comprehensive analysis of asteroid Ryugu particles returned by the Hayabusa2 mission. At least 23 amino acids are detected - looking forward to the D/L-ratio!
リュウグウのアミノ酸はこっちの論文か(長い)
https://t.co/4kXUZdPZPg
Nakamura et al. (2022) On the origin and evolution of the asteroid Ryugu: A comprehensive geochemical perspective. Proc. Jpn. Acad., Ser. B, 98, 227–282.
https://t.co/M4dyV3wSU8
On the origin and evolution of the asteroid Ryugu: A comprehensive geochemical perspective
→引用論文数は245件と膨大だ!
#Ryugu
#asteroid https://t.co/3InbhGPn4M
@Fuchas_ @VCT_ElMercurio https://t.co/ICy4Irvwq1
On the origin and evolution of the asteroid Ryugu: A comprehensive geochemical perspective https://t.co/1gC1AxyDC1
On the origin and evolution of the asteroid Ryugu: A comprehensive geochemical perspective
"Ryugu aliquot (C0008-18) was found to contain at least 23 amino acids..."
https://t.co/yX3G8XzUU8
はやぶさ2試料からアミノ酸23種 論文「太陽系の化石」: 日本経済新聞 https://t.co/5YnIZXTIZ0