Multiwavelength observations of a partial filament eruption on 13 June 2011

TL;DR

This study presents multiwavelength observations of a partial solar filament eruption, revealing bifurcation, material flows, and a jet-like CME, and proposes a new mechanism for such eruptions.

Contribution

The paper introduces a novel schematic model explaining the partial filament eruption process observed in multiple wavelengths.

Findings

Filament split into major and runaway parts during eruption.

Runaway part evolved into a jet-like CME at 324 km/s.

Proposed a new mechanism for partial filament eruptions.

Abstract

In this paper, we report the multiwavelength observations of the partial filament eruption associated with a C1.2 class flare in NOAA active region 11236 on 13 June 2011. The event occurred at the eastern limb in the field of view (FOV) of Atmospheric Imaging Assembly (AIA) on board the Solar Dynamics Observatory (SDO) spacecraft and was close to the disk center in the FOV of Extreme-UltraViolet Imager (EUVI) on board the behind Solar Terrestrial Relations Observatory (STEREO) spacecraft. During eruption, the filament splits into two parts: the major part and runaway part. The major part flows along closed loops and experiences bifurcation at the loop top. Some of the materials move forward and reach the remote footpoint, while others return back to the original footpoint. The runaway part flows along open field lines, which is evidenced by a flare-related type III radio burst. The runaway part also undergoes bifurcation. The upper branch of escapes the corona and evolves into a jet-like narrow coronal mass ejection (CME) at a speed of 324 km s-1, while the lower branch falls back to the solar surface. A schematic cartoon is proposed to explain the event and provides a new mechanism of partial filament eruptions