TY  - JOUR
A1  - Gou, Tingyu
A1  - Liu, Rui
A1  - Kliem, Bernhard
A1  - Wang, Yuming
A1  - Veronig, Astrid M.
T1  - The birth of a coronal mass ejection
JF  - Science Advances
N2  - 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 helical magnetic 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 initiates when 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.
Y1  - 2019
U6  - https://doi.org/10.1126/sciadv.aau7004
SN  - 2375-2548
VL  - 5
IS  - 3
PB  - American Assoc. for the Advancement of Science
CY  - Washington
ER  -