Interaction and Eruption of Two Filaments Observed by Hinode, SOHO, and STEREO

TL;DR

This study observes the interaction and eruption of two solar filaments from multiple spacecraft perspectives, revealing their dynamics, velocities, and plasma temperatures to better understand solar filament behavior and coronal activity.

Contribution

It provides detailed multi-viewpoint observations of filament interaction and eruption, including velocity measurements and plasma temperature analysis, which are novel insights into filament dynamics.

Findings

Filaments interacted and were ejected along different paths.

Eruption velocities reached hundreds of km/s.

Plasma temperatures ranged from 10^4 to 10^6 K.

Abstract

We investigate the interaction between two filaments and the subsequent filament eruption event observed from different view angles by Hinode, the Solar and Heliospheric Observatory (SOHO), and the Solar Terrestrial Relations Observatory (STEREO). In the event, the two filaments rose high, interacted with each other, and finally were ejected along two different paths. We measure the bulk-flow velocity using spectroscopic data. We find significant outflows at the speed of a few hundreds of km/s during the filament eruption, and also some downflows at a few tens of km/s at the edge of the eruption region in the late stage of the eruption. The erupting material was composed of plasmas with a wide temperature range of 10^4-10^6 K. These results shed light on the filament nature and the coronal dynamics.