High
spatial and temporal resolutions of the Solar Optical Telescope (SOT) on board Hinode enabled us to capture fast dynamic phenomena
caused by flux emergence. One such phenomenon may be a chromospheric running wave from a
rotating magnetic polarity region with a size of > 5,000 km (hereafter, solar cyclone which was compared to a cyclone on the Earth). A possible mechanism for
producing the running wave was investigated with a three-dimensional
magnetohydrodynamic simulation of an emerging twisted flux tube. The simulation showed that the solar cyclone produced an arc-shaped chromospheric region with enhanced plasma density in front of the cyclone, which propagated outward from the core of the cyclone where a strong downdraft was generated along magnetic field lines locally standing vertical.
Reference
Magara, T. et al. 2012 PASJ, 64, L4
Wedemeyer-Bohm, S., & Rouppe van der Voort, L. 2009, A&A, 507, L9
Kitiashvili, I. N., et al. 2012, ApJ, 751, L21
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