Article (Scientific journals)
SECCHI observations of the Sun-s Garden-Hose Density spiral
Sheeley, N.R.; Herbst, A.D.; Palatchi, C.A. et al.
2008In Astrophysical Journal, 674, p. 109–L112
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Keywords :
corona; coronal mass ejections; magnetic fields
Abstract :
[en] The SECCHI HI2 white-light imagers on the STEREO A and B spacecraft show systematically different proper motions of material moving outward from the Sun in front of high-speed solar wind streams from coronal holes. As a group of ejections enters the eastern (A) field of view, the elements at the rear of the group appear to overrun the elements at the front. (This is a projection effect and does not mean that the different elements actually merge.) The opposite is true in the western (B) field; the elements at the front of the group appear to run away from the elements at the rear. Elongation/time maps show this effect as a characteristic grouping of the tracks of motion into convergent patterns in the east and divergent patterns in the west, consistent with ejections from a single longitude on the rotating Sun. Evidently, we are observing segments of the “garden-hose” spiral made visible when fast wind from a low-latitude coronal hole compresses blobs of streamer material being shed at the leading edge of the hole.
Disciplines :
Space science, astronomy & astrophysics
Author, co-author :
Sheeley, N.R.
Herbst, A.D.
Palatchi, C.A.
Wang, Y.-M.
Howard, Russell A.
Moses, John Daniel
Vourlidas, Angelos
Newmark, J.S.
Socker, Dennis G.
Plunkett, Simon P.
Korendyke, Clarence M.
Burlaga, L.F.
Davila, J.M.
Thompson, W.T.
St Cyr, O.C.
Harrison, R.A.
Davis, C.J.
Eyles, C.J.
Halain, Jean-Philippe ;  Université de Liège > CSL (Centre Spatial de Liège)
Wang, D.
Rich, Nathan B.
Battams, K.
Esfandiari, E.
Stenborg, Guillermo Adrian
More authors (14 more) Less
Language :
English
Title :
SECCHI observations of the Sun-s Garden-Hose Density spiral
Publication date :
2008
Journal title :
Astrophysical Journal
ISSN :
0004-637X
eISSN :
1538-4357
Publisher :
University of Chicago Press, United States - Illinois
Volume :
674
Pages :
L109–L112
Peer reviewed :
Peer Reviewed verified by ORBi
Available on ORBi :
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