Measurements of Filament Height in Hα and EUV 304 Å
Measurements of Filament Height in Hα and EUV 304 Å
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DOI：
10.1007/s11207-010-9573-9
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发表时间：
2010-06
期刊：
影响因子：
2.8
通讯作者：
Yan Xu;J. Jing;Haimin Wang
中科院分区：
文献类型：
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作者：
Yan Xu;J. Jing;Haimin Wang
在这项研究中，我们分别在EUV304和Hα线中心用STEREO和全球高分辨率H-α网络(GUN)观测到了细丝的三维(3D)构型。这是位于活动区域NOAA 10956附近的最大暗条，2007年5月19日，该区域产生了一次小型B9.6耀斑和两次日冕物质抛射。通过三角测量，从两个不同的角度重建了沿该细丝追踪的多个点的三维坐标。2007年5月19日，两个立体声(A和B)航天器的分离角α为8.6度。分别使用EUV304和Hα图像中的立体图像来估计细丝的“真实”高度。我们的结果表明，灯丝的极紫外光发射比Hα发射的位置更高。我们还将EUV中测得的细丝的重建高度与先前研究中报道的高度进行了比较。
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 angleαof 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.