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Title	en Sounding-rocket microgravity experiments on alumina dust
Creator	en Ishizuka, Shinnosuke en Kimura, Yuki NRID 1000050449542 en Sakon, Itsuki en Kimura, Hiroshi en Yamazaki, Tomoya en Takeuchi, Shinsuke en Inatomi, Yuko
Accessrights	open access
Rights	http://creativecommons.org/licenses/by/4.0/ en Creative Commons Attribution 4.0 International
Subject	Other en microgravity experiments Other en alumina dust NDC 420
Description	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.
Publisher	en Nature Publishing Group
Date	Issued2018-09-19
Language	eng
Resource Type	journal article
Version Type	VoR
Identifier	HDL http://hdl.handle.net/2115/71742
Relation	isIdenticalTo DOI https://doi.org/10.1038/s41467-018-06359-y
Journal	PISSN 2041-1723 en Nature communications Volume Number9 Page Start3820
File	fulltext naturecommunications9_3820.pdf 919.55 KB (application/pdf) Issued2018-09-19
Oaidate	2023-07-26