Issue |
A&A
Volume 412, Number 1, December II 2003
|
|
---|---|---|
Page(s) | 267 - 270 | |
Section | The Sun | |
DOI | https://doi.org/10.1051/0004-6361:20034115 | |
Published online | 25 November 2003 |
Spectro-polarimetric observation of the fine structure of a quiescent filament
1
Department of Astronomy, Nanjing University, 210093, Nanjing, PR China
2
Observatoire de Paris, Section de Meudon, 92195, Meudon, France
Corresponding author: Y. H. Tang, yhtang@nju.edu.cn
Received:
24
July
2003
Accepted:
21
August
2003
This paper presents the spectro-polarimetric measurements of a big quiescent filament observed by the MSDP mode of the THEMIS on August 24, 2000. The Hα, CaII 8542 and NaI D2 line profiles of a segment of the filament were obtained. By use of the Hα images with high spatial resolution, the two barb endpoints were identified. The parameters at the barbs' endpoints, including intensity, velocity and longitudinal magnetic field were measured. Using the data with high spatial resolution (0.16'' per pixel), we have found the following results. 1) There was mass motion at the barb endpoints in the chromosphere, the values and the directions of the mass motion at the barb endpoints change in several minutes. 2) The two barb endpoints are located between the majority polarities and the minority polarities.
Key words: line: profiles / Sun: filaments / Sun: magnetic fields
© ESO, 2003
Current usage metrics show cumulative count of Article Views (full-text article views including HTML views, PDF and ePub downloads, according to the available data) and Abstracts Views on Vision4Press platform.
Data correspond to usage on the plateform after 2015. The current usage metrics is available 48-96 hours after online publication and is updated daily on week days.
Initial download of the metrics may take a while.