COMBINED STEREO/RHESSI STUDY OF CORONAL MASS EJECTION ACCELERATION AND PARTICLE ACCELERATION IN SOLAR FLARES

By M. Temmer, Astrid Veronig, E. P. Kontar, S. Krucker, B. Vršnak. 2010

159 citations recorded by the source corpus.

Using the potential of two unprecedented missions, Solar Terrestrial Relations Observatory (STEREO) and Reuven Ramaty High-Energy Solar Spectroscopic Imager (RHESSI), we study three well-observed fast coronal mass ejections (CMEs) that occurred close to the limb together with their associated high-energy flare emissions in terms of RHESSI hard X-ray (HXR) spectra and flux evolution. From STEREO/EUVI and STEREO/COR1 data, the full CME kinematics of the impulsive acceleration phase up to ∼4 R☉ is measured with a high time cadence of ⩽2.5 minutes. For deriving CME velocity and acceleration, we apply and test a new algorithm based on regularization methods. The CME maximum acceleration is achieved at heights h ⩽ 0.4 R☉, and the peak velocity at h ⩽ 2.1 R☉ (in one case, as small as 0.5 R☉). We find that the CME acceleration profile and the flare energy release as evidenced in the RHESSI HXR flux evolve in a synchronized manner. These results support the “standard” flare/CME model which is characterized by a feedback relationship between the large-scale CME acceleration process and the energy release in the associated flare.

Subfields: Astronomy and Astrophysics

View Paper: https://www.semanticscholar.org/paper/0a41b86a2aa585c36ce4d11cf6441ea012cdf7c2

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In Astronomy and Astrophysics

1. M. Temmer
2. S. Patsourakos
3. A. Vourlidas
4. Guillermo Stenborg
5. Nat Gopalswamy
6. R. Howard
7. T. Howard
8. D. Webb

Citations in the corpus

• DIRECT EVIDENCE FOR A FAST CORONAL MASS EJECTION DRIVEN BY THE PRIOR FORMATION AND SUBSEQUENT DESTABILIZATION OF A MAGNETIC FLUX ROPE (2012, background): “The observed flare - flux rope dynamics largely conform with the well-known synchronization between flare emissions and CME acceleration (e.g., Zhang et al. 2001; Zhang et al. 2004; Maričić et al. 2007; Temmer et al. 2010; Bein et al. 2012).”
• Space weather: the solar perspective (2021, background): “For strong eruptive events an almost synchronized behavior between flare HXR emission and CME acceleration is obtained through a feedback relation (Temmer et al. 2008, 2010).”