THEMIS Multi-Spacecraft Observations of Magnetosheath Plasma Penetration Deep Into the Dayside Low-Latitude Magnetosphere for Northward and Strong By IMF

Details THEMIS Multi-Spacecraft Observations of Magnetosheath Plasma Penetration Deep Into the Dayside Low-Latitude Magnetosphere for Northward and Strong By IMF THEMIS Multi-Spacecraft Observations of Magnetosheath Plasma Penetration Deep Into the Dayside Low-Latitude Magnetosphere for Northward and Strong By IMF

May 2008

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2008agusmsm53a..01o&link_type=abstract

American Geophysical Union, Spring Meeting 2008, abstract #SM53A-01

Other

2723 Magnetic Reconnection (7526, 7835), 2724 Magnetopause And Boundary Layers, 2740 Magnetospheric Configuration And Dynamics, 2764 Plasma Sheet, 2784 Solar Wind/Magnetosphere Interactions

Scientific paper

On 2007-06-03 the five THEMIS spacecraft consecutively traversed the dayside (13.5 MLT) magnetopause during northward IMF with strong By. While one spacecraft monitored the magnetosheath, the other four encountered a persistent and extended region of nearly-stagnant magnetosheath plasma attached to the magnetopause on closed field lines. This region was much denser than, but otherwise similar to, the nightside cold-dense plasma sheet. At one point this region was bordered by two spacecraft, allowing the direct determination of its thickness of 0.9 RE. There was no evidence for Kelvin-Helmholtz waves nor diffusion at the local magnetopause. The characteristics of the particle distributions suggest that substantial solar wind entry across the dayside magnetopause occurred as a result of reconnection in both cusps involving the same field lines, resulting in trapping of plasma on the nose of the magnetosphere, sunward of 13.5 MLT, even when the IMF clock angle was as large as 60 degrees.

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