|
Hokkaido University Collection of Scholarly and Academic Papers >
Institute of Low Temperature Science >
Peer-reviewed Journal Articles, etc >
Sounding-rocket microgravity experiments on alumina dust
This item is licensed under:Creative Commons Attribution 4.0 International
| Title: | Sounding-rocket microgravity experiments on alumina dust |
| Authors: | Ishizuka, Shinnosuke Browse this author | | Kimura, Yuki Browse this author →KAKEN DB | | Sakon, Itsuki Browse this author | | Kimura, Hiroshi Browse this author | | Yamazaki, Tomoya Browse this author | | Takeuchi, Shinsuke Browse this author | | Inatomi, Yuko Browse this author |
| Keywords: | microgravity experiments | | alumina dust |
| Issue Date: | 19-Sep-2018 |
| Publisher: | Nature Publishing Group |
| Journal Title: | Nature communications |
| Volume: | 9 |
| Start Page: | 3820 |
| Publisher DOI: | 10.1038/s41467-018-06359-y |
| Abstract: | 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. |
| Rights: | http://creativecommons.org/licenses/by/4.0/ |
| Type: | article |
| URI: | http://hdl.handle.net/2115/71742 |
| Appears in Collections: | 低温科学研究所 (Institute of Low Temperature Science) > 雑誌発表論文等 (Peer-reviewed Journal Articles, etc)
|
Submitter: 木村 勇気
|
