Cyclic Variations of CME Velocity

Details Cyclic Variations of CME Velocity Cyclic Variations of CME Velocity

Jan 2001

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2001soph..198..179i&link_type=abstract

Solar Physics, v. 198, Issue 1, p. 179-195 (2001).

Physics

6

Scientific paper

The semiannual mean CME velocities for the time interval of 1979-1989 have been analyzed to reveal a complex cyclic variation with a peak at the solar cycle maximum and a secondary peak at the minimum of the cycle. The growth of the mean CME width is accompanied by a growth of the mean CME velocity. It is shown that the cyclic variations of the mean CME velocity and the mean CME width are associated with the cyclic variations of the large-scale magnetic field structure and that the secondary peak of the semiannual mean CME velocity in 1985-1986 is due to a significant contribution of fast CMEs with a width of ~100° at the minimum of the cycle. This peak is supposed to be due to the increasing role of the global large-scale magnetic field system with a characteristic size of cells of ~70°-100° at the minimum of the cycle and the respective particularities of the large-scale magnetic field configuration in the corona.

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