Flow speed inside the brightness boundary of coronal streamers

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...

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Bibliographic Details
Published in:Geophysical research letters 2006-05, Vol.33 (10), p.L10104-n/a
Main Authors: Suess, S. T., Nerney, S.
Format: Article
Language:English
Subjects:
Corona
Earth sciences
Earth, ocean, space
Exact sciences and technology
Interplanetary Physics
Magnetic fields
Solar Physics
Solar Physics, Astrophysics, and Astronomy
Solar wind sources
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Summary: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 the observation that there is no measureable outflow below 2.5 solar radii and then an increase to N 100 km/s at 5 solar radii in the streamer stalk. We briefly describe the model, observations, and physical interpretation.
ISSN:0094-8276
1944-8007
DOI:10.1029/2006GL026182