Frequent Occurrence of High-Speed Local Mass Downflows on the Solar Surface

Astronomy and Astrophysics – Astrophysics

Scientific paper

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Sun, Solar Photosphere

Scientific paper

New spectro-polarimetric measurements have been carried out with the Solar Optical Telescope onboard the Hinode satellite, revealing the frequent appearance of polarization signals indicating high-speed, probably supersonic, downflows that are associated with at least three different configurations of magnetic fields in the solar photosphere. The excitation of supersonic mass flows are one of the key observational features of the dynamical evolution occurring in magnetic-field fine structures on the solar surface. Furthermore, understanding the origins of observed supersonic flows may help to understand complicated interactions between plasma flows and magnetic fields in the astrophysical plasma.

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