Search Publications
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…
Solar EUV Experiment (SEE): Mission overview and first results
Chamberlin, Phillip C.; Woods, Thomas N.; Eparvier, Francis G. +6 more
The Solar EUV Experiment (SEE) is one of four scientific instruments on the NASA Thermosphere Ionosphere Mesosphere Energetics Dynamics (TIMED) spacecraft, which has been simultaneously observing the Sun and Earth's upper atmosphere since January 2002. The SEE instrument measures the irradiance of the highly variable, solar extreme ultraviolet (EU…
Radial evolution of the electron distribution functions in the fast solar wind between 0.3 and 1.5 AU
McComas, D. J.; Maksimovic, M.; Issautier, K. +8 more
Observed electron distribution functions of the solar wind permanently exhibit three different components: a thermal core and a suprathermal halo, which are always present at all pitch angles, and a sharply magnetic field aligned "strahl" which is usually anti-sunward moving. Whereas Coulomb collisions can explain the relative isotropy of the core…
Cluster observations of electron holes in association with magnetotail reconnection and comparison to simulations
Balogh, A.; Lucek, E.; André, M. +8 more
Large-amplitude (up to ∼50 mV/m) solitary waves, identified as electron holes, have been observed during waveform captures on two of the four Cluster satellites during several plasma sheet encounters that have been identified as the passage of a magnetotail reconnection x line. The electron holes were seen near the outer edge of the plasma sheet, …
Cluster observations of an intense normal component of the electric field at a thin reconnecting current sheet in the tail and its role in the shock-like acceleration of the ion fluid into the separatrix region
Balogh, A.; Lucek, E. A.; Reme, H. +12 more
Measurements from the Cluster spacecraft of electric fields, magnetic fields, and ions are used to study the structure and dynamics of the reconnection region in the tail at distances of ∼18 RE near 22.4 MLT on 1 October 2001. This paper focuses on measurements of the large amplitude normal component of the electric field observed in th…
Visibility of coronal mass ejections as a function of flare location and intensity
Howard, R. A.; Gopalswamy, N.; Michalek, G. +2 more
We report the visibility (detection efficiency) of coronal mass ejections (CMEs) of the Large Angle Spectrometric Coronagraph (LASCO) on board the Solar and Heliospheric Observatory (SOHO). We collected 1301 X-ray flare events (above C3 level) detected by the GOES satellite and examined their CME associations using data from LASCO coronagraphs. Th…
Reconnection in a rotation-dominated magnetosphere and its relation to Saturn's auroral dynamics
Jackman, C. M.; Milan, S. E.; Yeoman, T. K. +6 more
The first extended series of observations of Saturn's auroral emissions, undertaken by the Hubble Space Telescope in January 2004 in conjunction with measurements of the upstream solar wind and interplanetary magnetic field (IMF) by the Cassini spacecraft, have revealed a strong auroral response to the interplanetary medium. Following the arrival …