Classification of Coronal Mass Ejections Based on the Analysis of Height-Time Plots

Physics

Scientific paper

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7513 Coronal Mass Ejections, 7519 Flares, 7531 Prominence Eruptions

Scientific paper

The "Sheeley Diagram" has been used to argue in favor of two distinct types of Coronal Mass Ejections (CMEs) based on distinguishable structure in a plot of height versus projected velocity. A large number of manually tracked CME features were analyzed and used to create a new velocity versus altitude plot. This plot does show a distinct class of CMEs. All of the events with low initial velocity show significant acceleration. The hypothesis that these events are usually associated with the eruption of pre-existing streamer structures will be discussed. A "Sheeley Diagram" will also be presented for CME features measured in events associated with large X-ray flares. This work was preformed under contract at NRL and was supported by NASA. The LASCO telescopes are part of the SOHO mission which is a result of international cooperation between NASA and ESA.

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