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Global Energetics of Solar Flares: VI. Refined Energetics of Coronal Mass Ejections View all abstracts by submitter

Markus J. Aschwanden   Submitted: 2017-04-06 13:14

In this study we refine a CME model presented in an earlier study on the global energetics of solar flares and associated CMEs, and apply it to all (860) GOES M- and X-class flare events observed during the first 7 years (2010-2016) of the Solar Dynamics Observatory (SDO) mission, which doubles the statistics of the earlier study. The model refinements include: (1) the CME geometry in terms of a 3D sphere undergoing self-similar adiabatic expansion; (2) the inclusion of solar gravitational deceleration during the acceleration and propagation of the CME, which discriminates eruptive and confined CMEs; (4) a self-consistent relationship between the CME center-of-mass motion detected during EUV dimming and the leading-edge motion observed in white-light coronagraphs; (5) the equi-partition of the CME kinetic and thermal energy; and (6) the Rosner-Tucker-Vaiana (RTV) scaling law. The refined CME model is entirely based on EUV dimming observations (using AIA/SDO data) and complements the traditional white-light scattering model (using LASCO/SOHO data), and both models are independently capable to determine fundamental CME parameters such as the CME mass, speed, and energy. Comparing the two methods we find that: (1) LASCO is less sensitive than AIA in detecting CMEs (in 24% of the cases); (2) CME masses below m_cme ~ 1014 g are under-estimated by LASCO; (3) AIA and LASCO masses, speeds, and energy agree closely in the statistical mean after elimination of outliers; (4) the CMEs parameters of the speed v, emission measure-weighted flare peak temperature Te, and length scale L are consistent with the following scaling laws (derived from first principles): v ~ Te^1/2, v~ (m_cme)^1/4, and m_cme ~ L2.

Authors: Markus J. Aschwanden
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Publication Status: 2017, ApJ 847:27 (19pp)
Last Modified: 2017-09-25 09:09
Go to main E-Print page  Gradual Solar Coronal Dimming and Evolution of Coronal Mass Ejection in the Early Phase  Long-term Pulses of Dynamic Coupling between Solar Hemispheres  Edit Entry  Download Preprint  Submitter's Homepage Delete Entry 

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