Search Publications
Simultaneous observations of field-aligned beams and gyrating ions in the terrestrial foreshock
Dandouras, I.; Klecker, B.; Lucek, E. A. +14 more
We examine an energetic (2-30 keV) upstream ion event presenting a clear double-peak spectrum observed ∼1 RE upstream from the bow shock. The lower-energy (E ∼ 3.5 keV) peak is associated with an ion beam propagating along the magnetic field direction, while the higher-energy (E ∼ 13 keV) peak is associated with gyrating ions having pit…
Solar wind stream interaction regions without sector boundaries
Steinberg, J. T.; Goldstein, B. E.; Neugebauer, M. +2 more
During periods of high solar activity when there are many sources of solar wind on the solar disk, a spacecraft occasionally encounters consecutive solar wind streams with the same magnetic polarity. The low-speed wind in the region of interaction between the two streams exhibits many of the same features as, but has some differences from, the low…
Motion and orientation of magnetic field dips and peaks in the terrestrial magnetosheath
Balogh, A.; Dandouras, I.; RèMe, H. +2 more
Using data from the four Cluster spacecraft, estimates of the motion of isolated magnetic field dips and peaks in the magnetosheath are presented. Their motion and orientation are deduced using four-spacecraft timing, with typical spacecraft separations of ∼100 km. A set of 39 clear isolated dips and 12 peaks, spread over 4 days, is considered. Th…
In-flight calibration of the Cassini-Radio and Plasma Wave Science (RPWS) antenna system for direction-finding and polarization measurements
Gurnett, Donald A.; Fischer, Georg; Lecacheux, Alain +10 more
One major objective of the Cassini mission is the analysis of Saturnian radio emissions of magnetospheric (auroral) as well as atmospheric (lightning) origin. The Radio and Plasma Wave Science (RPWS) experiment is designed to measure the full polarization and the wave vector of the incoming radio waves, allowing us to retrieve information on sourc…
A two-dimensional Alfvén wave-driven solar wind model with proton temperature anisotropy
Li, Xing; Li, Bo; Habbal, Shadia R. +1 more
We present the first two-dimensional (2-D) Alfvén wave turbulence-driven solar wind model which takes the proton temperature anisotropy into account. While the modeled proton temperature anisotropy in the fast solar wind is established in the inner corona and yields Tp∥/Tp⊥ = 0.57 at 1 AU, which is compa…
Multisatellite measurements of electron phase space density gradients in the Earth's inner and outer magnetosphere
Balogh, A.; Daly, P. W.; Dunlop, M. W. +4 more
The variability of the intensity of energetic (MeV) electrons in the Earth's radiation belts has been a renewed area of interest in recent years, yet a major outstanding question is the origin of these particles. In the current study we attempt to differentiate between local stochastic heating and radial diffusion or transport by investigating whe…
Energetic particle observations in the vicinity of Jupiter: Cassini MIMI/LEMMS results
Livi, S.; Krupp, N.; Woch, J. +7 more
We report on energetic particle measurements from the Low Energy Magnetospheric Measurement System (LEMMS) on board the Cassini spacecraft during the Jupiter flyby (October 2000 to April 2001). Cassini passed Jupiter on its way to Saturn on the dusk flank of the magnetosphere and explored for the first time the dusk-to-midnight magnetosheath of th…
A statistical study of oxygen freezing-in temperature and energetic particles inside magnetic clouds observed by Ulysses
Krupp, N.; Woch, J.; Rodriguez, L. +5 more
Interplanetary Coronal Mass Ejections (ICMEs) have proven to be very complex phenomena, not easy to unveil using a single set of observations. We combine Ulysses observations of medium energy particles, solar wind plasma parameters, magnetic field, and charge state distributions of heavy ions in order to identify and characterize CME ejecta in the…
Homologous large-scale activity in solar eruptive events of 24-26 November 2000
Hudson, H. S.; Nitta, N. V.; Grechnev, V. V. +1 more
We study large-scale activity on the solar disk associated with a 24-26 November 2000 series of six recurrent major flares and "halo" coronal mass ejections (CMEs). The analysis is based mainly on the SOHO/EIT data, particularly by using properly rotated difference full-disk images with 12-min intervals at 195 Å as well as with 6-hour intervals at…
Low-energy particle response to CMEs during the Ulysses solar maximum northern polar passage
Lario, D.; Reisenfeld, D. B.; Roelof, E. C. +2 more
Near the end of 2001, the Ulysses spacecraft transited the northern polar regions of the heliosphere, above heliographic latitudes of 71°N. During this period (September-November 2001), Ulysses remained immersed in polar coronal hole solar wind flow and observed five intense solar energetic particle events and five interplanetary coronal mass ejec…