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Title:
Spectro-polarimetric observation of the fine structure of a quiescent filament
Authors:
Zong, W. G.; Tang, Y. H.; Fang, C.; Mein, P.; Mein, N.; Xu, A. A.
Affiliation:
AA(Department of Astronomy, Nanjing University, 210093, Nanjing, PR China), AB(Department of Astronomy, Nanjing University, 210093, Nanjing, PR China), AC(Department of Astronomy, Nanjing University, 210093, Nanjing, PR China), AD(Observatoire de Paris, Section de Meudon, 92195, Meudon, France), AE(Observatoire de Paris, Section de Meudon, 92195, Meudon, France), AF(Department of Astronomy, Nanjing University, 210093, Nanjing, PR China)
Publication:
Astronomy and Astrophysics, v.412, p.267-270 (2003) (A&A Homepage)
Publication Date:
12/2003
Origin:
A&A
Astronomy Keywords:
line: profiles, Sun: filaments, Sun: magnetic fields
DOI:
10.1051/0004-6361:20034115
Bibliographic Code:
2003A&A...412..267Z

Abstract

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 Halpha , CaII 8542 and NaI D2 line profiles of a segment of the filament were obtained. By use of the Halpha 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.
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