Temporal Relationships Between Acceleration of CMEs and Associated Flare X-ray Emission

Details Temporal Relationships Between Acceleration of CMEs and Associated Flare X-ray Emission Temporal Relationships Between Acceleration of CMEs and Associated Flare X-ray Emission

May 2008

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2008agusmsp43a..06c&link_type=abstract

American Geophysical Union, Spring Meeting 2008, abstract #SP43A-06

Physics

7513 Coronal Mass Ejections (2101)

Scientific paper

The erupting flux rope (EFR) model of CMEs predicts that a quantity of poloidal magnetic energy is injected into the existing equilibrium coronal flux ropes to initiate and drive CMEs. Predicted photospheric signatures of poloidal flux injection appear to be subtle (10--20% change in the incoherent horizontal field in the photosphere) and are currently difficult to detect or interpret. However, if it is assumed that the injected new magnetic flux is partially manifested as heating of coronal plasmas, then directly observable signatures such as X-ray emission may result. The model does not contain the physics of plasma heating due to the introduction of new poloidal magnetic field, but the temporal profile such as the duration of heating can be directly derived from the model, which can then be compared with data. In this paper, the analysis and modeling of a sample of CMEs with associated flare emissions are presented. It is shown for these events that the predicted poloidal energy injection profiles that yield the observed velocity profiles closely resemble the rise and peak plateau of flare X-ray emission profiles associated with the CMEs. This suggests that the flare X-ray emission associated with a CME is consistent with being a consequence of poloidal energy injection.
Work supported by ONR and NASA

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