Three-Dimensional Reconstruction of an Erupting Filament with SDO and STEREO Observations

Abstract

On 2010 August 1, a global solar event was launched involving almost the entire Earth-facing side of the Sun. This event mainly consisted of a C3.2 flare, a polar crown filament eruption and two Earth-directed coronal mass ejections (CMEs). The observations from the Solar Dynamics Observatory (SDO) and the Solar Terrestrial Relations Observatory (STEREO) showed that all the activities were coupled together, suggesting a global character of the magnetic eruption. We reconstruct the three-dimensional geometry of the polar crown filament using observations from three different viewpoints (STEREO A, B and SDO) for the first time. The filament undergoes two eruption processes. Firstly, the main body of the filament rises up, while it also moves towards the low-latitude region with a change in inclination by 48 degree and expands only in the altitudinal and latitudinal direction in the field of view of Atmospheric Imaging Assembly. We investigate the true velocities and accelerations of different locations along the filament, and find that the highest location always has the largest acceleration during this eruption process. During the late phase of the first eruption, part of the filament material separates from the eastern leg. This material displays a projectile motion and moves towards the west at a constant velocity of 141.8 km/s. This may imply that the polar crown filament consists of at least two groups of magnetic systems.

23 pages, 10 figures, accepted for publication in ApJ

References in corpus (10)

• STEREO/SECCHI Stereoscopic Observations Constraining the Initiation of Polar Coronal Jets
• Sigmoid-to-Flux-Rope Transition Leading to A Loop-Like Coronal Mass Ejection
• Direct Imaging by SDO AIA of Quasi-periodic Fast Propagating Waves of ~2000 km/s in the Low Solar Corona
• Stereoscopic Analysis of the 19 May 2007 Erupting Filament
• First Stereoscopic Coronal Loop Reconstructions from Stereo Secchi Images
• 3D evolution of a filament disappearance event observed by STEREO
• Kinematics of Two Eruptive Prominences observed by EUVI/STEREO
• Stereoscopic Polar Plume Reconstructions from Stereo/Secchi Images
• Magnetic Stereoscopy
• Determination of 3D Trajectories of Knots in Solar Prominences Using MSDP Data

Cited by in corpus (11)

• Multi-point shock and flux rope analysis of multiple interplanetary coronal mass ejections around 2010 August 1 in the inner heliosphere
• Some interesting topics provoked by the solar filament research in the past decade
• Pathways of large-scale magnetic couplings between solar coronal events
• Filament eruption on 2010 October 21 from three viewpoints
• Complex Flare Dynamics Initiated by a Filament-Filament Interaction
• Cosmic backgrounds due to the formation of the first generation of supermassive black holes
• Three-dimensional velocity fields of the solar filament eruptions detected by CHASE
• Failed Solar Eruption of A Multi-thermal Flux Rope
• Reconstructing 3D Magnetic Topology of On-disk Prominence Bubbles from Stereoscopic Observations
• A multi-spacecraft view of a giant filament eruption during 26/27 September 2009
• The Kinematical Behavior of Solar Eruptive Filaments Affected by the Poloidal Magnetic Field