Hydrogen Loss to the Solar Wind at Venus: Deductions from Proton Cyclotron Waves

Details Hydrogen Loss to the Solar Wind at Venus: Deductions from Proton Cyclotron Waves Hydrogen Loss to the Solar Wind at Venus: Deductions from Proton Cyclotron Waves

Dec 2004

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2004agufm.p23a0239m&link_type=abstract

American Geophysical Union, Fall Meeting 2004, abstract #P23A-0239

Physics

6006 Atmospheres: Evolution, 6025 Interactions With Solar Wind Plasma And Fields, 6225 Mars, 6295 Venus

Scientific paper

Proton cyclotron waves generated by ion pickup processes were detected at Mars, indicating the exospheric loss of hydrogen. Yet, these waves have never been reported at Venus, suggesting the possibility of different or less active loss mechanisms. However, a recent re-examination of the Pioneer Venus records, with more sophisticated data analysis techniques than were initially available, shows the presence of proton cyclotron waves up to at least 12 RV from the planet. A detailed wave analysis indicates that wave generation is controlled by the direction of the interplanetary magnetic field. These waves can provide insight into the nature of the pickup ion transport and acceleration processes at Venus.

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