Sounding-rocket microgravity experiments on alumina dust
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 α-Al2O3 (corundum, most stable polymorph) is a potential origin of a 13 μm feature that appears close to stars. However, no one has directly reproduced the 13 μm 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 μm and comparable in width to that observed near oxygen-rich AGB stars. Our finding that α-Al2O3 nucleates under certain condition provides a solid basis to elaborate condensation models of dust around oxygen-rich evolved stars.
| Medienart: |
E-Artikel |
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| Erscheinungsjahr: |
2018 |
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| Erschienen: |
2018 |
| Enthalten in: |
Zur Gesamtaufnahme - volume:9 |
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| Enthalten in: |
Nature communications - 9(2018), 1 vom: 19. Sept., Seite 3820 |
| Sprache: |
Englisch |
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| Beteiligte Personen: |
Ishizuka, Shinnosuke [VerfasserIn] |
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| Anmerkungen: |
Date Completed 14.12.2018 Date Revised 19.09.2019 published: Electronic Citation Status PubMed-not-MEDLINE |
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| doi: |
10.1038/s41467-018-06359-y |
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| funding: |
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| Förderinstitution / Projekttitel: |
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| PPN (Katalog-ID): |
NLM288689755 |
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| 100 | 1 | |a Ishizuka, Shinnosuke |e verfasserin |4 aut | |
| 245 | 1 | 0 | |a Sounding-rocket microgravity experiments on alumina dust |
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| 500 | |a Date Revised 19.09.2019 | ||
| 500 | |a published: Electronic | ||
| 500 | |a Citation Status PubMed-not-MEDLINE | ||
| 520 | |a 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 α-Al2O3 (corundum, most stable polymorph) is a potential origin of a 13 μm feature that appears close to stars. However, no one has directly reproduced the 13 μm 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 μm and comparable in width to that observed near oxygen-rich AGB stars. Our finding that α-Al2O3 nucleates under certain condition provides a solid basis to elaborate condensation models of dust around oxygen-rich evolved stars | ||
| 650 | 4 | |a Journal Article | |
| 650 | 4 | |a Research Support, Non-U.S. Gov't | |
| 700 | 1 | |a Kimura, Yuki |e verfasserin |4 aut | |
| 700 | 1 | |a Sakon, Itsuki |e verfasserin |4 aut | |
| 700 | 1 | |a Kimura, Hiroshi |e verfasserin |4 aut | |
| 700 | 1 | |a Yamazaki, Tomoya |e verfasserin |4 aut | |
| 700 | 1 | |a Takeuchi, Shinsuke |e verfasserin |4 aut | |
| 700 | 1 | |a Inatomi, Yuko |e verfasserin |4 aut | |
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