| Title: | Another View of the EIT Wave Phenomenon | |
| Authors: | Delannée, C. | |
| Affiliation: | AA(NASA/Goddard Space Flight Center, Mail Code 682.3, Greenbelt, MD 20771) | |
| Journal: | The Astrophysical Journal, Volume 545, Issue 1, pp. 512-523. (ApJ Homepage) | |
| Publication Date: | 12/2000 | |
| Origin: | UCP | |
| ApJ Keywords: | Sun: Corona, Sun: Flares, Sun: Magnetic Fields | |
| Abstract Copyright: | (c) 2000: The American Astronomical Society | |
| Bibliographic Code: | 2000ApJ...545..512D |
The three events show the following similar structures: A flare in an
active region. A bright front that can
lie at the same location for several hours. A first dimming located between the bright front and the
flare. A second dimming located between
the bright front and a magnetic dipole located in the opposite
hemisphere. A third dimming located in an
active region located in the opposite hemisphere. Brightenings or dimmings of transequatorial loops that connect
the flaring active region to an active region located in the opposite
hemisphere.
We propose that the appearance of the above features is strongly related to magnetic field topology. Most of the EIT waves are associated with a coronal mass ejection (CME). Moreover, the presence of a flare is not a necessary condition to produce an EIT wave since only eruptive flares that are associated with CMEs are associated with a wave. Therefore, we suggest that the EIT-wave phenomenon is more closely related to the magnetic field evolution involved in CMEs than to wave propagation driven by solar flares.