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First observation of energetic neutral atoms in the Venus environment

Galli, A; Wurz, P; Bochsler, P; Barabash, S; Grigoriev, A; Futaana, Y; Holmstrom, M; (2008) First observation of energetic neutral atoms in the Venus environment. PLANET SPACE SCI , 56 (6) 807 - 811. 10.1016/j.pss.2007.12.011.

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Abstract

The ASPERA-4 instrument on board the Venus Express spacecraft offers for the first time the possibility to directly measure the emission of energetic neutral atoms (ENAs) in the vicinity of Venus. When the spacecraft is inside the Venus shadow a distinct signal of hydrogen ENAs usually is detected. It is observed as a narrow tailward stream, coming from the dayside exosphere around the Sun direction. The intensity of the signal reaches several 10(5) cm(-1) sr(-1) s(-1), which is consistent with present theories of the plasma and neutral particle distributions around Venus. (c) 2007 Elsevier Ltd. All rights reserved.

Type: Article
Title: First observation of energetic neutral atoms in the Venus environment
DOI: 10.1016/j.pss.2007.12.011
Keywords: Venus exosphere, ENAs, solar wind-planetary atmosphere interaction, SOLAR-WIND INTERACTION, HYDROGEN, EXPRESS, OXYGEN, IONS, MARS
UCL classification: UCL > School of BEAMS > Faculty of Maths and Physical Sciences > Space and Climate Physics
URI: http://discovery.ucl.ac.uk/id/eprint/81886
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