Peculiar photospheric velocity fields and magnetic energy build-up

Details Peculiar photospheric velocity fields and magnetic energy build-up Peculiar photospheric velocity fields and magnetic energy build-up

Apr 1992

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1992a%26a...257..298z&link_type=abstract

Astronomy and Astrophysics (ISSN 0004-6361), vol. 257, no. 1, p. 298-306.

Astronomy and Astrophysics

Astrophysics

4

Photosphere, Solar Atmosphere, Solar Magnetic Field, Solar Rotation, Velocity Distribution, Angular Velocity, Force-Free Magnetic Fields, Solar Flares, Sunspots

Scientific paper

The in situ storage of magnetic energy was studied in a linear force-free arcade sheared by a relative velocity between its footpoints. The photospheric velocity fields used are related to sunspots proper motions and to the solar differential rotation pattern. Results indicate that sunspot proper motions are efficient in magnetic energy build-up and that the values of the stored magnetic energy in a region characterized by rigidly rotating structures coupled with new born sunspots may be sufficient to allow flaring activity. It is concluded that the anomalies in the solar angular velocity pattern may have an important role in the magnetic energy build-up.

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