Article (Scientific journals)
Association of Extreme-Ultraviolet Imaging Telescope (EIT) Polar Plumes with Mixed-Polarity Magnetic Network
Wang, Y.-M.; Sheeley, N R, Jr; Dere, K. P. et al.
1997In Astrophysical Journal, 484 (1), p. 75
 

Files


Full Text
Wang_1997_ApJ_484_L75.pdf
Publisher postprint (1.31 MB)
Request a copy

All documents in ORBi are protected by a user license.

Send to



Details



Keywords :
SUN: CHROMOSPHERE; SUN: CORONA; SUN: MAGNETIC FIELDS; SUN: UV RADIATION; SUN: X-RAYS; GAMMA RAYS; SUN: SOLAR WIND
Abstract :
[en] SOHO EIT spectroheliograms showing the polar coronal holes during the present sunspot minimum are compared with National Solar Observatory (Kitt Peak) magnetograms taken in Fe I lambda 8688 and Ca II lambda 8542. The chromospheric lambda 8542 magnetograms, obtained on a routine, near-daily basis since 1996 June, reveal the Sun's strong polar fields with remarkable clarity. We find that the Fe IX lambda 171 polar plumes occur where minority-polarity flux is in contact with flux of the dominant polarity inside each polar hole. Moreover, the locations of "plume haze" coincide approximately with the patterns of brightened He II lambda 304 network within the coronal hole. The observations appear to be consistent with mechanisms of plume formation involving magnetic reconnection between unipolar flux concentrations and nearby bipoles. The fact that minority-polarity fields constitute only a small fraction of the total magnetic flux within the polar holes suggests that plumes are not the main source of the high-speed polar wind.
Disciplines :
Aerospace & aeronautics engineering
Author, co-author :
Wang, Y.-M.
Sheeley, N R, Jr
Dere, K. P.
Duffin, R. T.
Howard, Russell A.
Michels, D. J.
Moses, J. D.
Harvey, J. W.
Branston, D. D.
Delaboudiniere, J.-P.
Artzner, G. E.
Hochedez, Jean-François
Defise, Jean-Marc ;  Université de Liège - ULiège > CSL : Direction générale - Satellites, missions et instruments spatiaux
Catura, R. C.
Lemen, J. R.
Gurman, J. B.
Neupert, W. M.
Newmark, J.
Thompson, B.
Maucherat, A.
More authors (10 more) Less
Language :
English
Title :
Association of Extreme-Ultraviolet Imaging Telescope (EIT) Polar Plumes with Mixed-Polarity Magnetic Network
Publication date :
1997
Journal title :
Astrophysical Journal
ISSN :
0004-637X
eISSN :
1538-4357
Publisher :
University of Chicago Press, Chicago, United States - Illinois
Volume :
484
Issue :
1
Pages :
L75
Available on ORBi :
since 11 December 2018

Statistics


Number of views
43 (4 by ULiège)
Number of downloads
2 (2 by ULiège)

Scopus citations®
 
40
Scopus citations®
without self-citations
28
OpenCitations
 
35

Bibliography


Similar publications



Contact ORBi