NGUYEN, G.; AUNAI, N.; MICHOTTE DE WELLE, Bayane; JEANDET, A.; LAVRAUD, B.; FONTAINE, D.

doi:10.1029/2021JA029776

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NGUYEN, G.
Délégation générale de l'armement [DGA]
Laboratoire de Physique des Plasmas [LPP]

AUNAI, N.
Laboratoire de Physique des Plasmas [LPP]

MICHOTTE DE WELLE, Bayane
Laboratoire de Physique des Plasmas [LPP]

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Journal of Geophysical Research Space Physics. 2022, vol. 127, n° 1, p. e2021JA029776

American Geophysical Union/Wiley

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The shape and location of the magnetopause current sheet in the near-cusp region is still a debated question. Over time, several observations led to contradictory conclusions regarding the presence of an indentation of the magnetopause in that region. As a result several empirical models consider the surface is indented in that region, while some others do not. To tackle this issue, we fit a total of 17,230 magnetopause crossings to various indented and non-indented analytical models. The results show that while all models describe the magnetopause position and shape equivalently far from the cusp region, the non-indented version over-estimate the radial position of the near-cusp magnetopause. Among indented models, we show that the one designed from non-linearmagneto hydrodynamic simulations fits well the near-cusp magnetopause location, while the other underestimate its position probably because their design was possibly based on magnetopause crossing catalogs that contain cusp inner boundary crossings.< Leer menos

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Massive Multi‐Mission Statistical Study and Analytical Modeling of the Earth's Magnetopause: 4. On the Near‐Cusp Magnetopause Indentation

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