Physics – Plasma Physics
Scientific paper
Dec 2010
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2010agufmsh51d1716s&link_type=abstract
American Geophysical Union, Fall Meeting 2010, abstract #SH51D-1716
Physics
Plasma Physics
[7500] Solar Physics, Astrophysics, And Astronomy, [7839] Space Plasma Physics / Nonlinear Phenomena
Scientific paper
Hot Flow Anomaly observed on Interball-Tail on 03.14.1996 is investigated. The normal to the interplanetary current sheet interacting with bow shock was determined in assumption of tangential discontinuity. Calculated motional electric field was directed towards current sheet. The bow shock before HFA arrival to the spacecraft was quasi-perpendicular, and was quasi-parallel after HFA passage. Respectively, of the shocks, bracketing HFA, were quasi-perpendicular before HFA passage and quasi-parallel after it. With averaged velocity of plasma within the body of HFA and duration of HFA observation we determined its size in normal to the current sheet direction as ~ 2.5 RE. HFA consists of two regions separated by thin layer with different plasma characteristics. Convection of plasma within HFA, as observed along spacecraft trajectory by subtracting averaged velocity from observed velocities, show that plasma in each of two regions is moving from separating layer. It indicates that separating layer is the site of energy deposition from interaction of the solar wind with ions reflected from the shock. This is confirmed by analysis of ion velocity distributions in this layer.
Shestakov A.
Vaisberg Oleg L.
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