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タイトル	en Sounding-rocket microgravity experiments on alumina dust
作成者	en Ishizuka, Shinnosuke en Kimura, Yuki NRID 1000050449542 en Sakon, Itsuki en Kimura, Hiroshi en Yamazaki, Tomoya en Takeuchi, Shinsuke en Inatomi, Yuko
アクセス権	open access
権利情報	http://creativecommons.org/licenses/by/4.0/ en Creative Commons Attribution 4.0 International
主題	Other en microgravity experiments Other en alumina dust NDC 420
内容注記	Abstract en Alumina (Al2O3) is believed to be the first major condensate to form in the gas outflow from oxygen-rich evolved stars because of the refractoriness and that alpha-Al2O3. (corundum, most stable polymorph) is a potential origin of a 13 mu m feature that appears close to stars. However, no one has directly reproduced the 13 mu m feature experimentally, and it has remained as a noteworthy unidentified infrared band. Here, we report nucleation experiments on Al2O3 nanoparticles monitored by a specially designed infrared spectrometer in the microgravity environment of a sounding rocket. The conditions approximate to those around asymptotic giant branch (AGB) stars. The measured spectra of the nucleated Al2O3 show a sharp feature at a wavelength of 13.55 mu m and comparable in width to that observed near oxygen-rich AGB stars. Our finding that alpha-Al(2)O(3 )nucleates under certain condition provides a solid basis to elaborate condensation models of dust around oxygen-rich evolved stars.
出版者	en Nature Publishing Group
日付	Issued2018-09-19
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/2115/71742
関連	isIdenticalTo DOI https://doi.org/10.1038/s41467-018-06359-y
収録誌情報	PISSN 2041-1723 en Nature communications 巻9 開始ページ3820
ファイル	fulltext naturecommunications9_3820.pdf 919.55 KB (application/pdf) Issued2018-09-19
コンテンツ更新日時	2023-07-26