Estimation of width and inclination of a filament sheet using He II 304 A observations by STEREO/EUVI

TL;DR

This paper introduces a stereoscopic method using He II 304 Å observations from STEREO satellites to estimate the width and inclination of solar filament sheets, aiding in understanding their three-dimensional structure.

Contribution

A novel technique for determining filament sheet width and inclination using dual-view EUV observations from STEREO satellites.

Findings

Method successfully estimates filament width and inclination.

Provides filament height above the chromosphere.

Enhances 3D understanding of filament structures.

Abstract

The STEREO mission has been providing stereoscopic view of the filament eruptions in EUV wavelengths. The most extended view during filament eruptions is seen in He II 304 \AA observations, as the filament spine appears darker and sharper. The projected filament width appears differently when viewed from different angles by STEREO satellites. Here, we present a method for estimating the width and inclination of the filament sheet using He II 304 \AA\ observations by STEREO-A and B satellites from the two viewpoints. The width of the filament sheet, when measured from its feet to its apex, gives estimate of filament height above the chromosphere.