2011年8月
Itokawa Dust Particles: A Direct Link Between S-Type Asteroids and Ordinary Chondrites
SCIENCE
- 巻
- 333
- 号
- 6046
- 開始ページ
- 1113
- 終了ページ
- 1116
- 記述言語
- 英語
- 掲載種別
- DOI
- 10.1126/science.1207758
- 出版者・発行元
- AMER ASSOC ADVANCEMENT SCIENCE
The Hayabusa spacecraft successfully recovered dust particles from the surface of near-Earth asteroid 25143 Itokawa. Synchrotron-radiation x-ray diffraction and transmission and scanning electron microscope analyses indicate that the mineralogy and mineral chemistry of the Itokawa dust particles are identical to those of thermally metamorphosed LL chondrites, consistent with spectroscopic observations made from Earth and by the Hayabusa spacecraft. Our results directly demonstrate that ordinary chondrites, the most abundant meteorites found on Earth, come from S-type asteroids. Mineral chemistry indicates that the majority of regolith surface particles suffered long-term thermal annealing and subsequent impact shock, suggesting that Itokawa is an asteroid made of reassembled pieces of the interior portions of a once larger asteroid.
- リンク情報
-
- DOI
- https://doi.org/10.1126/science.1207758
- J-GLOBAL
- https://jglobal.jst.go.jp/detail?JGLOBAL_ID=201102200028469500
- Web of Science
- https://gateway.webofknowledge.com/gateway/Gateway.cgi?GWVersion=2&SrcAuth=JSTA_CEL&SrcApp=J_Gate_JST&DestLinkType=FullRecord&KeyUT=WOS:000294244300038&DestApp=WOS_CPL
- URL
- http://jglobal.jst.go.jp/public/201102200028469500
- ID情報
-
- DOI : 10.1126/science.1207758
- ISSN : 0036-8075
- J-Global ID : 201102200028469500
- Web of Science ID : WOS:000294244300038