Observing planets and small bodies in sputtered high-energy atom fluxes

Please use this identifier to cite or link to this item: http://ir.lib.ncu.edu.tw/handle/987654321/50900

Title:	Observing planets and small bodies in sputtered high-energy atom fluxes
Authors:	Milillo,A;Orsini,S;Hsieh,KC;Baragiola,R;Fama,M;Johnson,R;Mura,A;Plainaki,C;Sarantos,M;Cassidy,TA;De Angelis,E;Desai,M;Goldstein,R;Ip,WH;Killen,R;Livi,S
Contributors:	天文研究所
Keywords:	ION MASS-SPECTROMETRY;MERCURYS EXOSPHERE;SOLAR-WIND;WATER ICE;SURFACE-COMPOSITION;MAGNETIC-FIELD;LUNAR-SURFACE;MAGNETOSPHERE;MODEL;ATMOSPHERES
Date:	2011
Issue Date:	2012-03-27 18:12:27 (UTC+8)
Publisher:	國立中央大學
Abstract:	The evolution of the surfaces of bodies unprotected by either strong magnetic fields or thick atmospheres in the solar system is caused by various processes, induced by photons, energetic ions, and micrometeoroids. Among these processes, the continuous bombardment of the solar wind or energetic magnetospheric ions onto the bodies may significantly affect their surfaces, with implications for their evolution. Ion precipitation produces neutral atom releases into the exosphere through ion sputtering, with velocity distribution extending well above the particle escape limits. We refer to this component of the surface ejecta as sputtered high-energy atoms (SHEA). The use of ion sputtering emission for studying the interaction of exposed bodies (EB) with ion environments is described here. Remote sensing in SHEA in the vicinity of EB can provide mapping of the bodies exposed to ion sputtering action with temporal and mass resolution. This paper speculates on the possibility of performing remote sensing of exposed bodies using SHEA and suggests the need for quantitative results from laboratory simulations and molecular physic modeling in order to understand SHEA data from planetary missions. In Appendix A, referenced computer simulations using existing sputtering data are reviewed.
Relation:	JOURNAL OF GEOPHYSICAL RESEARCH-SPACE PHYSICS
Appears in Collections:	[Graduate Institute of Astronomy] journal & Dissertation

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