Astronomy and Astrophysics – Astrophysics
Scientific paper
Aug 1990
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1990esasp.311...57o&link_type=abstract
In ESA, Plasma Astrophysics p 57-62 (SEE N91-15046 06-90)
Astronomy and Astrophysics
Astrophysics
1
Flux Transfer Events, Magnetic Field Reconnection, Magnetohydrodynamics, Magnetopause, Magnetic Signatures, Magnetoresistivity, Three Dimensional Models
Scientific paper
At the dayside magnetopause of planetary magnetospheres Flux Transfer Events (FTEs) seem to play an important role in connection with magnetospheric activity. Using resistive MHD (magnetohydrodynamic) computations the dynamical evolution of a three dimensional magnetic reconnection process is analyzed. A localized magnetic reconnection process develops if a spot of enhanced resistivity appears in a current layer (e.g., due to suitable fluctuations at a boundary of the layer). The three dimensional reconnection process leads to the formation of structures which represent newly interconnected magnetic flux and show basic properties of the FTEs. A comparison with observations shows that many properties like the magnetic field signatures or pressure variations of FTEs are recovered in the simulations. For special initial conditions it is shown that crater like events (or magnetic holes) may also be formed by the considered process. The influence of fast waves in the solar wind on the process is discussed.
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