Measurements of filament height in Hα and EUV 304 Å

Document Type

Article

Publication Date

6-7-2010

Abstract

In this study, we present the three-dimensional (3D) configuration of a filament observed by STEREO and the Global High Resolution H-alpha Network (GHN) in EUV 304 Å and Hα line center, respectively. This was the largest filament located close to the active region NOAA 10956 that produced a small B9. 6 flare and two Coronal Mass Ejections (CMEs) on 19 May 2007. The 3D coordinates of multiple points traced along this filament were reconstructed by triangulation from two different aspect angles. The two STEREO (A and B) spacecraft had a separation angle α of 8.6 degree on 19 May 2007. The "true" heights of the filament were estimated using STEREO images in EUV 304 and Hα images, respectively. Our results show that EUV emission of the filament originates from higher locations than the Hα emission. We also compare the measured reconstructed heights of the filaments in EUV with those reported in previous studies. © 2010 Springer Science+Business Media B.V.

Identifier

77953709649 (Scopus)

Publication Title

Solar Physics

External Full Text Location

https://doi.org/10.1007/s11207-010-9573-9

e-ISSN

1573093X

ISSN

00380938

First Page

81

Last Page

91

Issue

1

Volume

264

Grant

0839216

Fund Ref

National Science Foundation

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