000007012 001__ 7012
000007012 005__ 20240806111712.0
000007012 0247_ $$2DOI$$a 10.3847/2041-8213/ad5da5
000007012 037__ $$aSCART-2024-0154
000007012 100__ $$aMajumdar, Satabdwa 
000007012 245__ $$aProbing Velocity Dispersion Inside Coronal Mass Ejections: New Insights on Their Initiation
000007012 260__ $$c2024
000007012 520__ $$aThis work studies the kinematics of the leading edge and the core of six coronal mass ejections (CMEs) in the combined field of view of Sun Watcher using Active Pixel System detector and Image Processing (SWAP) on board PRoject for On-Board Autonomy (PROBA-2) and the ground-based K-Cor coronagraph of the Mauna Loa Solar Observatory. We report, for the first time, on the existence of a critical height hc , which marks the onset of velocity dispersion inside the CME. This height for the studied events lies between 1.4 and 1.8 R ⊙, in the inner corona. We find the critical heights to be relatively higher for gradual CMEs, as compared to impulsive ones, indicating that the early initiation of these two classes might be different physically. We find several interesting imprints of the velocity dispersion on CME kinematics. The critical height is strongly correlated with the flux-rope minor radius and the mass of the CME. Also, the magnitude of the velocity dispersion shows a reasonable positive correlation with the above two parameters. We believe these results will advance our understanding of CME initiation mechanisms and will help provide improved constraints on CME initiation models.
000007012 536__ $$aBELSPO PRODEX/$$cBELSPO PRODEX/$$fBELSPO PRODEX
000007012 594__ $$aSTCE
000007012 6531_ $$aSolar coronal mass ejections
000007012 6531_ $$aAstrophysics - Solar and Stellar Astrophysics
000007012 6531_ $$aPhysics - Space Physics
000007012 700__ $$aD'Huys, Elke 
000007012 700__ $$aMierla, Marilena 
000007012 700__ $$aVashishtha, Nitin 
000007012 700__ $$aTalpeanu, Dana-Camelia 
000007012 700__ $$aBanerjee, Dipankar 
000007012 700__ $$aReiss, Martin A.
000007012 773__ $$n1$$pThe Astrophysical Journal Letters$$v970$$y2024
000007012 8560_ $$felke.dhuys@ksb-orb.be
000007012 85642 $$ahttps://ui.adsabs.harvard.edu/abs/2024ApJ...970L..17M/abstract
000007012 85642 $$ahttps://arxiv.org/abs/2407.02244
000007012 905__ $$apublished in
000007012 980__ $$aREFERD