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Thick escaping magnetospheric ion layer in magnetopause reconnection with MMS observations

Abstract : The structure of asymmetric magnetopause reconnection is explored with multiple point and high-time-resolution ion velocity distribution observations from the Magnetospheric Multiscale mission. On 9 September 2015, reconnection took place at the magnetopause, which separated the magnetosheath and the magnetosphere with a density ratio of 25:2. The magnetic field intensity was rather constant, even higher in the asymptotic magnetosheath. The reconnected field line region had a width of approximately 540 km. In this region, streaming and gyrating ions are discriminated. The large extension of the reconnected field line region toward the magnetosheath can be identified where a thick layer of escaping magnetospheric ions was formed. The scale of the magnetosheath side of the reconnected field line region relative to the scale of its magnetospheric side was 4.5:1.
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https://hal-insu.archives-ouvertes.fr/insu-03669490
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Submitted on : Monday, May 16, 2022 - 5:18:17 PM
Last modification on : Wednesday, November 16, 2022 - 11:46:09 AM

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T. Nagai, N. Kitamura, H. Hasegawa, I. Shinohara, S. Yokota, et al.. Thick escaping magnetospheric ion layer in magnetopause reconnection with MMS observations. Geophysical Research Letters, 2016, 43, pp.6028-6035. ⟨10.1002/2016GL069085⟩. ⟨insu-03669490⟩

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