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1.	Zeichner, Sarah S., et al. (author) Polycyclic aromatic hydrocarbons in samples of Ryugu formed in the interstellar medium 2023 In: Science. - : AMER ASSOC ADVANCEMENT SCIENCE. - 0036-8075 .- 1095-9203. ; 382:6677, s. 1411-1415 Journal article (peer-reviewed)abstract Polycyclic aromatic hydrocarbons (PAHs) contain less than or similar to 20% of the carbon in the interstellar medium. They are potentially produced in circumstellar environments (at temperatures greater than or similar to 1000 kelvin), by (similar to 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-C-13 substituted compositions (Delta 2x(13)C values) of the PAHs naphthalene, fluoranthene, and pyrene are 9 to 51 parts per thousand higher than values expected for a stochastic distribution of isotopes. The Delta 2x(13)C 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 Delta 2x(13)C values consistent with formation by higher-temperature reactions.

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Type of publication: journal article (1)

Type of content: peer-reviewed (1)

Author/Editor: Hertkorn, Norbert (1); Schmitt-Kopplin, Phi ... (1); Grice, Kliti (1); Tanaka, Satoshi (1); Sato, Hajime (1); Eiler, John M. (1); show more...; Orthous-Daunay, Fran ... (1); Vuitton, Veronique (1); Yoshikawa, Makoto (1); Glavin, Daniel P. (1); Dworkin, Jason P. (1); McLain, Hannah L. (1); Noguchi, Takaaki (1); Okada, Tatsuaki (1); Tsuda, Yuichi (1); Watanabe, Sei-ichiro (1); Aoki, Junken (1); Nakamura, Tomoki (1); Yabuta, Hikaru (1); Thissen, Roland (1); Ohkouchi, Naohiko (1); Takano, Yoshinori (1); Graham, Heather V. (1); Elsila, Jamie E. (1); Ruf, Alexander (1); Hashiguchi, Minako (1); Yurimoto, Hisayoshi (1); Okazaki, Ryuji (1); Naraoka, Hiroshi (1); Sakamoto, Kanako (1); Abe, Masanao (1); Yada, Toru (1); Nishimura, Masahiro (1); Yogata, Kasumi (1); Nakato, Aiko (1); Miyazaki, Akiko (1); Usui, Tomohiro (1); Nakazawa, Satoru (1); Terui, Fuyuto (1); Saiki, Takanao (1); Tachibana, Shogo (1); Zeichner, Sarah S. (1); Aponte, Jose C. (1); Bhattacharjee, Surjy ... (1); Dong, Guannan (1); Hofmann, Amy E. (1); Karp, Allison T. (1); Holman, Alex I. (1); Freeman, Katherine H ... (1); Hamase, Kenji (1); show less...

University: Linköping University (1)

Language: English (1)

Research subject (UKÄ/SCB): Natural sciences (1)

Year: 2023 (1)

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