Search Publications
A possible auroral signature of a magnetotail reconnection process on Jupiter
Clarke, J. T.; Waite, J. H.; Grodent, D. +2 more
Several theoretical models and in situ observations consistently suggest that the process of nightside reconnection associated with Earth's magnetospheric substorms is also taking place in the midnight tail region of Jupiter. We report the observation of a new auroral feature which takes the form of isolated spots appearing near the northern dusk-…
Cluster observations of finite amplitude Alfvén waves and small-scale magnetic filaments downstream of a quasi-perpendicular shock
Fazakerley, A. N.; Maksimovic, M.; Alexandrova, O. +7 more
The Cluster satellites crossed the Earth's bow shock several times on 31 March 2001. For all these crossings the bow shock was supercritical and quasi-perpendicular. We present here the results of a detailed analysis of the magnetic field fluctuations observed downstream of the shock. We use data from the four Cluster spacecraft to determine the b…
Modeling temporal variability of plasma conditions in the Io torus during the Cassini era
Delamere, P. A.; Bagenal, F.; Steffl, A.
Observations of ultraviolet (UV) emissions from the major ion species (S+, S++, S+++, O+, O++) of the Io plasma torus made during the Cassini flyby (October 2000 to March 2001) have revealed significant time variability. Using a homogeneous model for mass and energy flow in the torus parameter…
Case studies of the dynamics of ionospheric ions in the Earth's magnetotail
Lundin, R.; Sauvaud, J. -A.; Balogh, A. +19 more
This paper presents case studies of the dynamics of the terrestrial ions in the midplasma sheet and inside the lobes (∼17-19 RE). The high time resolution measurements of H+, He+, and O+ ions made on board Cluster show that these ions are massively injected into the tail during substorms/storms from the …
First comparisons of local ion measurements in the inner magnetosphere with energetic neutral atom magnetospheric image inversions: Cluster-CIS and IMAGE-HENA observations
Dunlop, Malcolm; Balogh, André; Dandouras, Iannis +9 more
Data provided by the CIS (Cluster Ion Spectrometry) instruments on board the Cluster spacecraft are used to survey recent crossings of the inner magnetosphere and ring current. CIS is capable of obtaining full three-dimensional ion distributions (about 0 to 40 keV/q) with one spacecraft spin time resolution and with mass-per-charge composition det…
Three-fluid model of the heating and acceleration of the fast solar wind
Ofman, L.
A new three-fluid, two-dimensional, wave-driven model that includes, for the first time, heat conduction, viscous, and resistive dissipation for protons and electrons in two-dimensional coronal hole is presented. The fast solar wind model includes electron, proton, and He++ or O5+ ion fluids. The heating of the solar wind pla…
Walén and slow-mode shock analyses in the near-Earth magnetotail in connection with a substorm onset on 27 August 2001
Balogh, A.; RèMe, H.; Vaivads, A. +6 more
We have examined Cluster spacecraft 1 (C1) magnetic field and particle observations from 27 August 2001 when the Cluster spacecraft separation was less than 0.27 RE and the spacecraft were located near the equatorial plane of the postmidnight magnetotail at xGSM ∼ -19 RE and yGSM ∼ -2.1 RE. A …
Total solar irradiance observations from DIARAD/VIRGO
Dewitte, S.; Crommelynck, D.; Joukoff, A.
The Differential Absolute Radiometer is making measurements of the total solar irradiance as part of the Variability of Irradiance and Gravity Oscillations experiment on the Solar and Heliospheric Observatory. We present the measurements made during its 7.8 years of operation, from 1996 until the present (2003). The aging due to UV exposure of the…
Counterstreaming electrons in magnetic clouds near 5 AU
Forsyth, R.; Crooker, N. U.; Gosling, J. T. +2 more
Suprathermal electron pitch angle spectrograms were searched for counterstreaming signatures in 31 magnetic clouds identified in Ulysses data when the spacecraft was located ∼5 AU from the Sun. Under the assumption that counterstreaming indicates closed field lines, that is, field lines attached to the Sun at both ends, we find that the clouds ran…
The kinetic shell model of coronal heating and acceleration by ion cyclotron waves: 3. The proton halo and dispersive waves
Isenberg, Philip A.
The kinetic shell model seeks to test the collisionless kinetic response of coronal hole protons to the quasi-linear resonant cyclotron dissipation of outwardly directed, parallel propagating ion cyclotron waves, which is often invoked as the mechanism responsible for generating the fast solar wind. In this model, we make the approximation that th…