First observation of energetic neutral atoms in the Venus environment

Details First observation of energetic neutral atoms in the Venus environment First observation of energetic neutral atoms in the Venus environment

May 2008

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2008p%26ss...56..807g&link_type=abstract

Planetary and Space Science, Volume 56, Issue 6, p. 807-811.

Physics

5

Scientific paper

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 10cmsrs, which is consistent with present theories of the plasma and neutral particle distributions around Venus.

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