Articles | Volume 33, issue 1
https://doi.org/10.5194/angeo-33-79-2015
https://doi.org/10.5194/angeo-33-79-2015
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15 Jan 2015
Regular paper | Highlight paper |  | 15 Jan 2015

Experimental test of the ρ(1-α) evolution for rotational discontinuities: cluster magnetopause observations

A. Blagau, G. Paschmann, B. Klecker, and O. Marghitu

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Short summary
Rotational discontinuities (RDs) in plasma allow a magnetic connection between different plasma regimes. One of their defining relations describes a balance between changes in plasma mass density and pressure anisotropy. The paper uses the high-time-resolution data from the Cluster satellites to directly test that relation at the terrestrial magnetopause, when standard analysis predicts that this boundary behaves like an RD. The experimental evidence shows that the said relation is not fulfilled