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Flow speed inside the brightness boundary of coronal streamers
Author(s) -
Suess S. T.,
Nerney S.
Publication year - 2006
Publication title -
geophysical research letters
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 2.007
H-Index - 273
eISSN - 1944-8007
pISSN - 0094-8276
DOI - 10.1029/2006gl026182
Subject(s) - outflow , physics , brightness , magnetohydrodynamic drive , flow (mathematics) , mechanics , geology , magnetohydrodynamics , geometry , meteorology , astronomy , magnetic field , mathematics , quantum mechanics
Density measurements in the legs of coronal streamers, where there might be outflow, are reproduced here using a magnetohydrodynamic model of the flow inside the brightness boundary of streamers. The model returns values for the flow speed and stream tube geometry (spreading) between the base and a few solar radii. The flow speed is consistent with there being no measurable outflow below 2.5 R ⊙ and an outflow of ∼100 km/s at 5 R ⊙ . We briefly describe the model, observations, and physical interpretation.