Pressure balance on the magnetopause near the subsolar point according to observational data of the THEMIS project satellites |
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| Authors: | S S Znatkova E E Antonova G N Zastenker I P Kirpichev |
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| Institution: | 1.Skobeltsyn Institute of Nuclear Physics,Moscow State University,Moscow,Russia;2.Space Research Institute,Russian Academy of Sciences,Moscow,Russia |
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| Abstract: | An analysis of the pressure balance on the magnetopause near the subsolar point has been made for 18 crossings of the magnetopause
by the THEMIS project satellites under magneto-quiet conditions. Dynamic and static pressures of plasma are determined, as
well as magnetic pressure in the magnetosheath, and magnetic and plasma static pressure inside the magnetosphere. Variations
of the total pressure have been studied in the case when one satellite is located inside the magnetosphere and another one
stays in the magnetosheath near the magnetopause. It is demonstrated that for 18 investigated events the condition of pressure
balance at the subsolar point is valid on average with an accuracy of 7%, within measurement errors and under applicability
of the approximation of anisotropic magnetic hydrodynamics to collisionless plasma of the magnetosheath and magnetosphere. |
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