Infrared spectroscopy of Wild 2 particle hypervelocity tracks in Stardust aerogel: Evidence for the presence of volatile organics in cometary dust

被引：26

作者：

Bajt, S.

Sandford, S. A. ^{[2
]}

Flynn, G. J. ^{[3
]}

Matrajt, G. ^{[4
]}

Snead, C. J. ^{[5
]}

Westphal, A. J. ^{[5
]}

Bradley, J. P. ^{[1
]}

机构：

[1] Lawrence Livermore Natl Lab, Inst Geophys & Planetary Phys, Livermore, CA 94550 USA

[2] NASA, Astrophys Branch, Ames Res Ctr, Moffett Field, CA 94035 USA

[3] SUNY Coll Plattsburgh, Dept Phys, Plattsburgh, NY 12901 USA

[4] Univ Washington, Dept Astron, Seattle, WA 98195 USA

[5] Univ Calif Berkeley, Space Sci Lab, Berkeley, CA 94720 USA

来源：

METEORITICS & PLANETARY SCIENCE | 2009年 / 44卷 / 04期

关键词：

GALACTIC-CENTER; 81P/WILD-2; INTERSTELLAR; MATTER; HYDROCARBONS; COLLECTION;

D O I：

10.1111/j.1945-5100.2009.tb00745.x

中图分类号：

P3 [地球物理学]; P59 [地球化学];

学科分类号：

0708 ; 070902 ;

摘要：

Infrared spectroscopy maps of some tracks made by cometary dust from 81P/Wild 2 impacting Stardust aerogel reveal an interesting distribution of organic material. Out of six examined tracks, three show presence of volatile organic components possibly injected into the aerogel during particle impacts. When particle tracks contained volatile organic material, they were found to be -CH2-rich, while the aerogel is dominated by the -CH3-rich contaminant. It is clear that the Population of cometary particles impacting the Stardust aerogel collectors also includes grains that contained little or none of this organic component. This observation is consistent with the highly heterogeneous nature of collected grains, as seen by a multitude of other analytical techniques.

引用

页码：471 / 484

页数：14

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