Search Publications
Electrodynamics of a split-transpolar aurora
RèMe, H.; Lester, M.; Dunlop, M. W. +6 more
We report new results on the relation between drift velocity shear, average inverted V energy, and the separation of bifurcated high-latitude Sun-aligned polar arcs within a global transpolar auroral arc system. The two parallel arcs appeared at the location of converging -v × B electric field of two sunward flow channels that were separated by an…
Striated drifting auroral kilometric radiation bursts: Possible stimulation by upward traveling EMIC waves
Santolik, O.; Menietti, J. D.; Mutel, R. L. +3 more
We investigate waves observed by the Cluster wideband instrument (WBD) during an orbital conjunction with the Polar spacecraft. During this perigee pass, Polar was at the upper extent of the auroral kilometric radiation (AKR) source region in the Southern Hemisphere nightside auroral region. Cluster was located at higher altitude above this region…
Tracing the location of the reconnection site from the northern and southern cusps
Fuselier, S. A.; Reme, H.; Trattner, K. J. +2 more
Three-dimensional plasma observations in the cusp have been successfully used to investigate the location of the reconnection site at the magnetopause. This technique uses low-velocity cutoffs in the precipitating and mirrored magnetosheath population traveling along open cusp field lines, which are then used to estimate the distance to the reconn…
Coupling effects throughout the solar atmosphere: 2. Model of energetically open circuit
Ryutova, M.
EUV structures in the solar atmosphere are studied on the basis of the energetically open equivalent circuits. The systems consist of current carrying magnetic loops that interconnect a high β energy-production region with a low β dissipation region and include the transition region where the most efficient generation of currents and transport of …
Heliospheric ion energization due to emerging CME shocks
Bale, S. D.; Roth, I.
Formation of inhomogeneous electromagnetic structures with gradients in magnetic field and intrinsic electric fields is commonly observed in magnetized plasmas. Heliospheric plasmas are susceptible to formation of localized, supersonically propagating electromagnetic inhomogeneities. Coronal relaxation may result in an emergence close to solar sur…
A search for two-component energetic proton events observed on board SOHO
Kocharov, Leon; Torsti, Jarmo; Al-Sawad, Amjad +1 more
We examined solar energetic particle (SEP) events from May 1996 through April 2000 that showed evidence for two peaks of intensity, separated by 3-24 hours, in the energy range ∼1-20 MeV, observed with the Energetic and Relativistic Nuclei and Electron instrument (ERNE) onboard Solar and Heliospheric Observatory (SOHO). Of 88 clear SEP events obse…