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Coronal Propagation of Solar Protons during and after Their Stochastic Acceleration
Logachev, Yu. I.; Struminsky, A. B.; Grigorieva, I. Yu. +1 more
Solar protons in eruptive flares are stochastically accelerated in a wide spatial angle, and then they are effectively kept behind the expanding coronal mass ejection (CME) front, which can either bring protons to the magnetic-field line going to a remote observer or carry them away. We consider 13 solar proton events of cycle 24 in which protons …
High-Cadence Observations of Magnetic Field Dynamics and Photospheric Emission Sources in the Eruptive Near-the-Limb X4.9 Solar Flare on 25 February, 2014: Evidences for Two-Stage Magnetic Reconnection during the Impulsive Phase
Zimovets, I. V.; Sharykin, I. N.; Radivon, A. V.
We present an analysis of the pre-limb eruptive X4.9 solar flare on February 25, 2014, by means of which we confirm a hypothesis of the two-stage energy release corresponding to two magnetic reconnection regimes in the flare impulsive phase. This flare is selected, firstly, because of its morphological peculiarities suggesting the presence of the …
The Influence of Oxygen Ions on the Formation of a Thin Current Sheet in the Magnetotail
Malova, H. V.; Popov, V. Yu.; Zelenyi, L. M. +2 more
A thin current sheet in the Earth's magnetotail with characteristic thickness of one to several proton gyroradii is often observed during magnetospheric disturbances named substorms, when a relatively thick current configuration in the magnetotail is narrowed to an extremely small thickness and then can spontaneously be destroyed. The current-shee…
Estimation of the Electron Density in the Near 3-4 RE Magnetosphere Based on the Measurement of the Interball-2 Satellite Potential
Smirnova, N. F.; Stanev, G.
A new method is proposed for determining the electron density in rarefied plasma, based on simultaneous measurements of the Interball-2 satellite potential using IESP-2 (electric field instrument) and KM-7 (electron temperature sensor) probe devices. This makes it possible to estimate the photoelectron current density based on a procedure proposed…