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Zeichner, S.S.* ; Aponte, J.C.* ; Bhattacharjee, S.* ; Dong, G.* ; Hofmann, A.E.* ; Dworkin, J.P.* ; Glavin, D.P.* ; Elsila, J.E.* ; Graham, H.V.* ; Naraoka, H.* ; Takano, Y.* ; Tachibana, S.* ; Karp, A.T.* ; Grice, K.* ; Holman, A.I.* ; Freeman, K.H.* ; Yurimoto, H.* ; Nakamura, T.* ; Noguchi, T.* ; Okazaki, R.* ; Yabuta, 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, S.i.* ; Tsuda, Y.* ; Hamase, K.* ; Fukushima, K.* ; Aoki, D.* ; Hashiguchi, M.* ; Mita, H.* ; Chikaraishi, Y.* ; Ohkouchi, N.* ; Ogawa, N.O.* ; Sakai, S.* ; Parker, E.T.* ; Mclain, H.L.* ; Orthous-Daunay, F.R.* ; Vuitton, V.* ; Wolters, C.* ; Schmitt-Kopplin, P. ; Hertkorn, N. ; Thissen, R.* ; Ruf, A.* ; Isa, J.* ; Oba, Y.* ; Koga, T.* ; Yoshimura, T.* ; Araoka, D.* ; Sugahara, H.* ; Furusho, A.* ; Furukawa, Y.* ; Aoki, J.* ; Kano, K.* ; Nomura, S.M.* ; Sasaki, K.* ; Sato, H.* ; Yoshikawa, T.* ; Morita, M.* ; Onose, M.* ; Kabashima, F.* ; Fujishima, K.* ; Yamazaki, T.* ; Kimura, Y.* ; Eiler, J.M.*

Polycyclic aromatic hydrocarbons in samples of Ryugu formed in the interstellar medium.

Science 382, 1411-1416 (2023)
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Polycyclic aromatic hydrocarbons (PAHs) contain ≲20% of the carbon in the interstellar medium. They are potentially produced in circumstellar environments (at temperatures ≳1000 kelvin), by (~10 kelvin) interstellar clouds, or by processing of carbon-rich dust grains. We report isotopic properties of PAHs extracted from samples of the asteroid Ryugu and the meteorite Murchison. The doubly-13C substituted compositions (Δ2×13C values) of the PAHs naphthalene, fluoranthene, and pyrene are 9 to 51‰ higher than values expected for a stochastic distribution of isotopes. The Δ2×13C values are higher than expected if the PAHs formed in a circumstellar environment, but consistent with formation in the interstellar medium. By contrast, the PAHs phenanthrene and anthracene in Ryugu samples have Δ2×13C values consistent with formation by higher-temperature reactions.
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Publication type Article: Journal article
Document type Scientific Article
Keywords Carbon-isotope Fractionation; Compound-specific Carbon; Organic-compounds; Parent-body; Gas-phase; Hydrogen; Chondrites; Pathways; Cm; Nucleosynthesis
Language english
Publication Year 2023
HGF-reported in Year 2023
ISSN (print) / ISBN 0036-8075
e-ISSN 1095-9203
Journal Science
Quellenangaben Volume: 382, Issue: 6677, Pages: 1411-1416 Article Number: , Supplement: ,
Publisher American Association for the Advancement of Science (AAAS)
Publishing Place 1200 New York Ave, Nw, Washington, Dc 20005 Usa
Reviewing status Peer reviewed
Institute(s) Research Unit BioGeoChemistry and Analytics (BGC)
POF-Topic(s) 30202 - Environmental Health
Research field(s) Environmental Sciences
PSP Element(s) G-504800-001
Grants ARC Laureate fellowship
Australian Research Council through a Discovery Outstanding Research Award
Japan Society for the Promotion of Science
NASA Consortium for Hayabusa2 Analysis of Organic Solubles
US Department of Energy BES Grant
Simons Foundation
NASA Emerging Worlds Grant
NSF Graduate Research Fellowship
DOI 10.1126/science.adg6304
WOS ID 001128567800004
Scopus ID 85180805344
PubMed ID 38127762
Erfassungsdatum 2024-01-09
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