Abstract

Many spectacular coronal mass ejections (CMEs) are known to occur without major flares. This has created a trend in which flares are considered to be unimportant in the processes of CME initiation. We point out that energetic CMEs are often associated with intense short-duration flares, and that there may even be a class of CMEs caused by flares. In order to prove or disprove the latter possibility, we need to go back to flare studies in a more systematic manner. Distinguishing waves from...

References

Akhmedov, E.K., The Neutrino Magnetic Moment and Time Variations of the Solar Neutrino Flux, in Fourth International Solar Neutrino Conference, ed. W. Hampel, Max-Planck-Institut fur Kernphysik Heidelberg, Germany, p. 388 (1997). Altmann, M., et al. GNO Solar Neutrino Observations Results for GNO I, Physics Letters B, 490, 16 (2000). Bretthorst, G.L. Bayesian Spectrum Analysis and Parameter Estimation, Vol. 48 of Lecture Notes in Statistics, ed. J. Berger et al., Springer-Verlag, Berlin,...

Introduction

Coronal structures play a very important role for understanding the evolution of the solar magnetic field during the solar cycle. They have a long history of investigation (Secchi 1877, d'Azambuja 1945, Waldmeier 1957, Leroy & Trellis 1974, Rusin et al. 1990, Altrock 1997). These studies reveal equatorward and poleward migrating structures in coronal emissions, that sometimes are called coronal activity waves. These observations led to a suggestion that the polar branch of activity might be...

Solar Week

Another major E PO activity resulting from the impact of Yohkoh is Solar Week. Solar Week was created with the primary aim of addressing the under-representation of women in the research and teaching of the physical sciences by specifically targeting middle-school girls. Solar Week is a daughter-site to YPOP, feeding off the YPOP Classroom activities. However, it also incorporates a number of novel features a lower level of interaction via games in addition to activities, direct interaction...

Dimensionality

Many of the diagrams and models in the literature have been strictly two-dimensional, and have been extremely successful. Surprisingly, several of the analyses which have made the greatest impact have dealt with flare structures that closely resemble the 2D cartoons e.g. Tsuneta 1996, 1997 Forbes amp Acton 1996 Aschwanden et al. 1996 Yokoyama et al. 2001 . At least one of the observations mentioned herein bears a striking resemblance to a 2.5D representation...