摘要
Cold ions of plasmaspheric origin have been observed to abundantly appear in the magnetospheric side of the Earth's magnetopause. These cold ions could affect the magnetic reconnection processes at the magnetopause by changing the Alfvén velocity and the reconnection rate, while they could also be heated in the reconnection layer during the ongoing reconnections. We report in situ observations from a partially crossing of a reconnection layer near the subsolar magnetopause. During this crossing, step-like accelerating processes of the cold ions were clearly observed, suggesting that the inflow cold ions may be separately accelerated by the rotation discontinuity and slow shock inside the reconnection layer.
Cold ions of plasmaspheric origin have been observed to abundantly appear in the magnetospheric side of the Earth’s magnetopause. These cold ions could affect the magnetic reconnection processes at the magnetopause by changing the Alfvén velocity and the reconnection rate, while they could also be heated in the reconnection layer during the ongoing reconnections. We report in situ observations from a partially crossing of a reconnection layer near the subsolar magnetopause. During this crossing, step-like accelerating processes of the cold ions were clearly observed, suggesting that the inflow cold ions may be separately accelerated by the rotation discontinuity and slow shock inside the reconnection layer.
基金
supported by the National Natural Science Foundation of China(41574138,41604139)
the Shandong Provincial Natural Science Foundation(JQ201412)
the Chinese Meridian Project
Reading University was supported by STFC consolidated(ST/M000885/1)
The Norwegian contribution was supported by the Research Council of Norway(230996.S.R.Z.)
support from the U.S.NASA LWS Project(NNX15AB83G)
the U.S.Do D MURI Project(ONR15-FOA-0011)
supported by the U.S.NSF Geospace Facility program under an agreement AGS-1242204 with Massachusetts Institute of Technology
