| タイトル | Electron Beam Analysis of Micrometeoroids Captured in Aerogel as Stardust Analogues |
| 本文（外部サイト） | http://hdl.handle.net/2060/20050169522 |
| 著者（英） | Sheffield-Parker, J.; Snead, C.; Dai, Z. R.; Graham, G. A.; Bradley, P.; Kearsley, A. T.; Ishii, H.; Teslich, N.; Mayo, S. C.; Westphal, A. J. |
| 著者所属（英） | California Univ., San Diego |
| 発行日 | 2005-01-01 |
| 言語 | eng |
| 内容記述 | In January 2004, NASA s Stardust spacecraft passed through the tail of Comet 81P/Wild-2. The on-board dust flux monitor instrument indicated that numerous micro- and nano-meter sized cometary dust particles were captured by the dedicated silica aerogel capture cell. The collected cometary particles will be returned to Earth in January 2006. Current Stardust analogues are: (i) Light-gas-gun accelerated individual mineral grains and carbonaceous meteoritic material in aerogels at the Stardust encounter velocity ca.approximately 6 kilometers per second. (ii) Aerogels exposed in low-Earth orbit (LEO) containing preserved cosmic dust grains. Studies of these impacts offer insight into the potential state of the captured cometary dust by Stardust and the suitability of various analytical techniques. A number of papers have discussed the application of sophisticated synchrotron analytical techniques to analyze Stardust particles. Yet much of the understanding gained on the composition and mineralogy of interplanetary dust particles (IDPs) has come from electron microscopy studies. Here we discuss the application of scanning electron microscopy (SEM) for Stardust during the preliminary phase of post-return investigations. |
| NASA分類 | Lunar and Planetary Science and Exploration |
| 権利 | Copyright, Distribution under U.S. Government purpose rights |
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