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タイトル	en Formation of chiral CO polyhedral crystals on icy interstellar grains
作成者	en Kouchi, Akira NRID 1000060161866 en Tsuge, Masashi en Hama, Tetsuya en Niinomi, Hiromasa NRID 1000040768983 en Nakatani, Naoki en Shimonishi, Takashi en Oba, Yasuhiro en Kimura, Yuki NRID 1000050449542 en Sirono, Sin-iti en Okuzumi, Satoshi en Momose, Munetake en Furuya, Kenji en Watanabe, Naoki NRID 1000050271531
アクセス権	open access
権利情報	en This article has been accepted for publication in Monthly notices of the royal astronomical society ©:2021 Akira Kouchi Published by Oxford University Press on behalf of The Royal Astronomical Society. All rights reserved.
主題	Other en astrochemistry Other en method: laboratory: solid-state Other en ISM: dust NDC 430
内容注記	Abstract en The crystallinity and morphology of solid carbon monoxide (CO) on icy interstellar grains were examined by observing the deposition, crystallization, and UV and electrons irradiation of solid CO using transmission electron microscopy. Herein, we found that solid CO deposited in molecular clouds was crystalline, and that even if amorphous CO was deposited, amorphous CO crystallized within 10(3) yr at 10 K. Conversely, crystalline CO was not amorphized by UV rays or electron beam at 10 K. These results indicated the occurrence of chiral crystalline CO instead of amorphous CO in space. Furthermore, the large surface diffusion coefficients of CO on eamorphous H2O and crystalline CO at 10 K facilitated the morphological equilibration of crystalline CO. Bad wetting of crystalline CO with amorphous H2O proved that the morphology of the ice grains was not spherical with an onion-like structure, as hitherto assumed, but rather it was a polyhedral crystalline CO attached to amorphous H2O. This has important implications for phenomena associated with the collision and subsequent sticking between ice grains, surface chemical reactions, non-thermal desorption of molecules and the origin of homochirality in interstellar biomolecules.
出版者	en Oxford University Press
日付	Issued2021-07
言語	eng
資源タイプ	journal article
出版タイプ	VoR
資源識別子	HDL http://hdl.handle.net/2115/82505
関連	isIdenticalTo DOI https://doi.org/10.1093/mnras/stab1173
収録誌情報	PISSN 0035-8711 en Monthly notices of the royal astronomical society 巻505 号1 開始ページ1530 終了ページ1542
ファイル	fulltext Monthly notices of the royal astronomical society505 (1)_1530-1542.pdf 5.88 MB (application/pdf) Issued2021-07
コンテンツ更新日時	2023-07-26