Europa's surface composition and sputter-produced ionosphere

被引：60

作者：

Johnson, RE ^{[1
]}

Killen, RM

Waite, JH

Lewis, WS

机构：

[1] Univ Virginia, Charlottesville, VA 22903 USA

[2] NASA, Goddard Inst Space Studies, New York, NY 10025 USA

[3] SW Res Inst, San Antonio, TX USA

来源：

GEOPHYSICAL RESEARCH LETTERS | 1998年 / 25卷 / 17期

关键词：

D O I：

10.1029/98GL02565

中图分类号：

P [天文学、地球科学];

学科分类号：

07 ;

摘要：

The efficient sputtering and decomposition of Europa's regolith by energetic charged particles produces an atmosphere representative of its surface composition. In addition to O-2 and H-2 from the decomposition of ice, we show that molecules representative of organics and salts will be present in ionic form at levels detectable using an ion mass spectrometer on an orbiting spacecraft. Such an instrument can also measure isotope ratios to determine surface age.

引用

收藏

页码：3257 / 3260

页数：4

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