HR: 13:55h
AN: SH22B-02    [PDF]
TI: The Relation Between Coronal Mass Ejections and Outward Motions in the Low Corona
AU: Metcalf, T R
EM: metcalf@lmsal.com
AF: Lockheed Martin Solar and Astrophysics Laboratory, Dept/L9-41, B/252 3251 Hanover Street, Palo Alto, CA 94304 United States
AB: Outward motions are frequently observed in the low corona, especially in the early phase of solar flares. Some of these motions, observed in X-ray, EUV, and radio wavelengths, appear to be intimately linked to coronal mass ejections (CMEs) as observed by white-light coronagraphs, typically above 2 Rsun. In principle, a combination of X-ray/EUV/radio and coronagraph data should give many constraints on models of CME initiation and early propagation. However, such attempts are not straightforward because of the diversity of low coronal motions, which often have unclear relationships, if any, to the CME. In this presentation, we compare many examples of low coronal motions observed by TRACE and Yohkoh with CMEs observed by LASCO, and discuss what we can objectively conclude from the data. Errors resulting from the inclusion of different and possibly incompatible data in a single so-called height-time plot are discussed. We also study the reality of the flare association of CMEs, which, according to the height-time plots, precede the flare and hence the low coronal motions by more than an hour.
DE: 7513 Coronal mass ejections
DE: 7519 Flares
DE: 7531 Prominence eruptions
SC: SPA - Solar and Heliospheric Physics [SH]
MN: 2003 Fall Meeting