Open AccessMHD simulation of sawtooth events in meridional plane driven by various solar wind velocities
Author(s) -
E. V. Gubanov,
А. П. Лихачев,
С. А. Медин
Publication year - 2020
Publication title -
journal of physics. conference series
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.21
H-Index - 85
eISSN - 1742-6596
pISSN - 1742-6588
DOI - 10.1088/1742-6596/1698/1/012030
Subject(s) - sawtooth wave , physics , magnetosphere , magnetohydrodynamics , solar wind , geophysics , interplanetary magnetic field , vortex , dipole model of the earth's magnetic field , mercury's magnetic field , magnetic flux , plasma sheet , magnetic field , atmospheric sciences , mechanics , quantum mechanics , computer science , computer vision
The meridional global MHD modeling of magnetosphere sawtooth events is performed for three values of the solar wind velocity: 200 km/s, 400 km/s and 800 km/s. The tooth cycle period of the open magnetic field specific flux decreases from 6.4 to 2.0 ks, respectively, while the oscillations amplitude changes inessentially. The tail magnetic field topology evolve through all the standard phases and events. In the distant tail the flapping current sheet is disturbed by the Alfven waves. In the dipole magnetic field domain the night-side attached vortices splitting and their subsequent shedding occur forming the Karman like vortex street. The vortex shedding period falls from 200 s to 110 s with the increase of the solar wind velocity. In the day-side shocked layer the vertically elongated thin magnetic island with the two neutral points is located. The magnetic island accounts for the deflection of the solar plasma inflow around the magnetosphere.