Current Sheets and Substroms in Venus' Magnetotail

Details Current Sheets and Substroms in Venus' Magnetotail Current Sheets and Substroms in Venus' Magnetotail

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.

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