Abstract

Sequential eruptions triggered during the early phase of flux emergence under a circular filament - observations and modelling
Structure and Dynamics of Magnetic Fields in the Sun, Solar System and Beyond
Sally Dacie
UCL Mullard Space Science Laboratory
Tibor Török (Predictive Science Inc.), Mark Linton (Naval Research Laboratory), Pascal Démoulin (Observatoire de Paris), Lidia van Driel-Gesztelyi (UCL MSSL, Observatoire de Paris, Konkoly Observatory), David Long (UCL MSSL))
The emergence of magnetic flux through the solar photosphere in the vicinity of a filament can trigger a coronal mass ejection (CMEs), or alternatively it could stabilise the filamentary structure. Both modelling and observational studies have shown that whether a filament is activated depends on the position, orientation and strength of the emerging flux. The emergence of a small bipole underneath a quiescent circular filament on 18-July-2014 causes the filament to split, to erupt and in the process to form a new filament arcade, which also undergoes an eruption. We propose a mechanism to explain this activity, based on SDO/AIA and HMI observations, and we are currently working on simulations to reproduce this.

Schedule

16:30 - 18:00
17:24
Thursday
EX - C33 (150)

RASLogo