Physics
Scientific paper
Dec 2008
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2008agufm.p13b1310v&link_type=abstract
American Geophysical Union, Fall Meeting 2008, abstract #P13B-1310
Physics
2744 Magnetotail, 2790 Substorms, 5443 Magnetospheres (2756), 6295 Venus, 7835 Magnetic Reconnection (2723, 7526)
Scientific paper
We investigate 2 years of Venus Express FGM data when the spacecraft is crossing Venus' magnetotail. Using only data when the IMF is within ± 20° of the nominal Parker spiral ~ 37° and little variation of the field before and after the tail crossing, we obtain a quiet-time magnetic field profile along the orbit of the spacecraft. There is an Earth-like tail field in the region less then 3 RV downstream from Venus and the current sheet is in the XYVSO-plane, with an estimated current density of 3 nA/m2. We also investigate two cases, one for a quiet tail and one for an acitive tail, using both FGM and ASPERA data. Increased but constant pressure of the solar wind is shown to increase the esitmated cross- tail current. Most importantly, strongly varying solar wind magnetic field is shown to lead to observations that can be interpreted as reconnection in Venus' magnetotail.
Barabash Stas
Baumjohann Wolfgang
Delva Magda
Futaana Yoshifumi
Volwerk Martin
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