Drifting of the line-tied footpoints of CME flux-ropes

0510982 - ASÚ 2020 RIV FR eng J - Journal Article
Aulanier, G. - Dudík, Jaroslav
Drifting of the line-tied footpoints of CME flux-ropes.
Astronomy & Astrophysics. Roč. 621, January (2019), č. článku A72. ISSN 0004-6361. E-ISSN 1432-0746
R&D Projects: GA ČR(CZ) GA17-16447S
Institutional support: RVO:67985815
Keywords : magnetic reconnection * magnetohydrodynamics * coronal mass ejections
OECD category: Astronomy (including astrophysics,space science)
Impact factor: 5.636, year: 2019
Method of publishing: Open access

Existing 3D extensions to the standard model show that flux-rope footpoints are surrounded by curved-shaped quasi-separatrix layer (QSL) footprints that can be related with hook-shaped flare-ribbons. We build upon this finding and further address the joint questions of their time-evolution, and of the formation of flare loops at the ends of the flaring polarity inversion line (PIL) of the erupting bipole, which are both relevant for flare understanding in general and for interplanetary CME studies in particular. Our model predicts continuous deformations and a drifting of interplanetary CME flux-rope footpoints whose areas are surrounded by equally evolving hooked-shaped flare-ribbons, as well as the formation of flare loops at the ends of flaring PILs which originate from the flux-rope itself, both of which being due to purely three-dimensional reconnection geometries. The observed evolution of flare-ribbons in two events supports the model, but more observations are required to test all its predictions.
Permanent Link: http://hdl.handle.net/11104/0301330