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Journal Article

The warped heliospheric current sheet

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Klecker,  Berndt
Space Plasma Physics of Near-Earth Environment, MPI for Extraterrestrial Physics, Max Planck Society;

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Citation

Peng, J., Liu, Y. C., Huang, J., Klecker, B., & Wang, C. (2019). The warped heliospheric current sheet. Journal of Geophysical Research - Space Physics, 124(2), 9814-9823. doi:10.1029/2019JA026517.


Cite as: https://hdl.handle.net/21.11116/0000-0005-8669-E
Abstract
The global shape of the intersection of the heliospheric current sheet (HCS) with the heliospheric equatorial plane is usually considered to be an Archimedean spiral, however, so far this has not been measured directly. We used multi‐spacecraft measurements to determine its global shape. The time‐shifted measured locations are fitted with Archimedean spirals. In most cases, the locations are fitted very well with Archimedean spirals, in addition to the direction of HCS determined by the Minimum Variation Analysis. However, there is one case in which the direction of the HCS does not fit well with the Archimedean spiral and therefore we fit it with a sinusoidal function in addition to an Archimedean spiral. The result showed that in some cases, the HCS is better described with an Archimedean spiral, superposed by small‐scale ripples.