Document Detail


MESSENGER observations of the spatial distribution of planetary ions near Mercury.
MedLine Citation:
PMID:  21960628     Owner:  NLM     Status:  In-Process    
Abstract/OtherAbstract:
Global measurements by MESSENGER of the fluxes of heavy ions at Mercury, particularly sodium (Na(+)) and oxygen (O(+)), exhibit distinct maxima in the northern magnetic-cusp region, indicating that polar regions are important sources of Mercury's ionized exosphere, presumably through solar-wind sputtering near the poles. The observed fluxes of helium (He(+)) are more evenly distributed, indicating a more uniform source such as that expected from evaporation from a helium-saturated surface. In some regions near Mercury, especially the nightside equatorial region, the Na(+) pressure can be a substantial fraction of the proton pressure.
Authors:
Thomas H Zurbuchen; Jim M Raines; James A Slavin; Daniel J Gershman; Jason A Gilbert; George Gloeckler; Brian J Anderson; Daniel N Baker; Haje Korth; Stamatios M Krimigis; Menelaos Sarantos; David Schriver; Ralph L McNutt; Sean C Solomon
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Publication Detail:
Type:  Journal Article; Research Support, U.S. Gov't, Non-P.H.S.    
Journal Detail:
Title:  Science (New York, N.Y.)     Volume:  333     ISSN:  1095-9203     ISO Abbreviation:  Science     Publication Date:  2011 Sep 
Date Detail:
Created Date:  2011-09-30     Completed Date:  -     Revised Date:  -    
Medline Journal Info:
Nlm Unique ID:  0404511     Medline TA:  Science     Country:  United States    
Other Details:
Languages:  eng     Pagination:  1862-5     Citation Subset:  IM    
Affiliation:
Department of Atmospheric, Oceanic and Space Sciences, University of Michigan, Ann Arbor, MI 48109-2143, USA. thomasz@umich.edu
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