Publikationsdatum:
2017-05-10
Beschreibung:
We analyzed 20 reconnection events observed by the Magnetosphere MultiScale (MMS) mission, finding that in a sub-region of the magnetospheric inflow, the electron temperature parallel to the magnetic field ( T e || ) decreases towards the separatrix with increasing densities. Such T e || variation is not consistent with the heating through the parallel potential mechanism for magnetospheric electrons. Associated with the change in T e|| , low-energy gyrotropic magnetosheath-like electrons are observed. These electrons may come from the magnetosheath, penetrate to the magnetospheric side possibly due to waves in the lower-hybrid frequency range, and do not experience as much energization as those from deeper in the magnetosphere. In addition, as T e || decreases, the high-energy field-aligned phase-space densities decrease, or fluctuate significantly over time. Wave-particle interaction might produce energy conversion and cause the high-energy phase-space density variations.
Print ISSN:
0094-8276
Digitale ISSN:
1944-8007
Thema:
Geologie und Paläontologie
,
Physik
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