Annales Geophysicae
Annales Geophysicae
ANGEO
Articles | Volume 35, issue 1
Articles | Volume 35, issue 1
https://doi.org/10.5194/angeo-35-71-2017
© Author(s) 2017. This work is distributed under
the Creative Commons Attribution 3.0 License.
https://doi.org/10.5194/angeo-35-71-2017
© Author(s) 2017. This work is distributed under
the Creative Commons Attribution 3.0 License.
Articles | Volume 35, issue 1
Regular paper
 | 
05 Jan 2017
Regular paper |  | 05 Jan 2017

Absence of the strahl during times of slow wind

Chris Gurgiolo and Melvyn L. Goldstein

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Short summary
Observations during periods when the solar wind has a speed < 425 km s−1 show that it is not uncommon to find no strahl present in the data. The research was done in response to observations and was performed through a detailed study of the electron velocity distribution functions. The conclusion arrived at is that the absence of the strahl appears to occur within individual flux tubes, which may indicate that the source lies in the solar corona where the strahl is formed.
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