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Start Over Author "L. V. Ermakova" Journal astronomy letters
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1. Dynamics of line-of-sight velocities and magnetic field in the solar photosphere during the formation of the large active region NOAA 10488

Author

V. M. Grigor’ev, L. V. Ermakova, and A. I. Khlystova

Subjects
Physics, Sunspot, Photosphere, Line-of-sight, Space and Planetary Science, Astronomy and Astrophysics, Coronal loop, Astrophysics, Chromosphere, Magnetic flux, Remote sensing, Nanoflares, Magnetic field
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.

Published
2007
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