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The birth of a coronal mass ejection View all abstracts by submitter

Rui Liu   Submitted: 2019-03-08 16:57

The Sun's atmosphere is frequently disrupted by coronal mass ejections (CMEs), coupled with flares and energetic particles. The coupling is usually attributed to magnetic reconnection at a vertical current sheet connecting the flare and CME, with the latter embedding a helicalmagnetic structure known as flux rope. However, both the origin of flux ropes and their nascent paths toward eruption remain elusive. Here, we present an observation of how a stellar-sized CME bubble evolves continuously from plasmoids, mini flux ropes that are barely resolved, within half an hour. The eruption initiateswhen plasmoids springing from a vertical current sheet merge into a leading plasmoid, which rises at increasing speeds and expands impulsively into the CME bubble, producing hard x-ray bursts simultaneously. This observation illuminates a complete CME evolutionary path capable of accommodating a wide variety of plasma phenomena by bridging the gap between microscale and macroscale dynamics.

Authors: Tingyu Gou, Rui Liu, Bernhard Kliem, Yuming Wang, and Astrid M. Veronig
Projects: None

Publication Status: published at Science Advances
Last Modified: 2019-03-12 23:29
Go to main E-Print page  Frequency?Distance Structure of Solar Radio Sources Observed by LOFAR  Properties of slow magnetoacoustic oscillations of solar coronal loops by multi-instrumental observations  Edit Entry  Download Preprint  Delete Entry 

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