Dynamics of line-of-sight velocities and magnetic field in the solar photosphere during the formation of the large active region NOAA 10488 |
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| Authors: | V M Grigor’ev L V Ermakova A I Khlystova |
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| Institution: | (1) Institute for Solar-Terrestrial Physics, Russian Academy of Sciences, Siberian Branch, P.O. Box 291, Irkutsk, 664033, Russia |
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| Abstract: | Analysis of SOHO longitudinal magnetograms and Dopplergrams has revealed the appearance of a region of enhanced upflow of matter in the photosphere when the top of a loop-shaped magnetic flux tube forming a large active region passed through it. The maximum upflow velocity reached 2 km s?1, the maximum size exceeded 20 000 km, and the lifetime was about 2 h. |
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| Keywords: | Sun active regions magnetic field |
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