Search Publications
Local field-aligned currents in the magnetotail and ionosphere as observed by a Cluster, Double Star, and MIRACLE conjunction
RèMe, H.; Fazakerley, A. N.; Klecker, B. +12 more
During a fortuitous conjunction event observed by Cluster, Double Star TC1, and Magnetometers-Ionospheric Radars-All-Sky Cameras Large Experiment (MIRACLE) magnetometer stations at almost the same local time, crossings of the plasma sheet boundary layer (PSBL) are observed with a 45-50 s delay between the two spacecraft located approximately 6 R
Influence of the tilt angle on the bow shock shape and location
Merka, J.; Šafránková, J.; Jelínek, K. +1 more
The bow shock is created in front of an obstacle immersed into a supersonic flow and its location depends on the size and shape of the obstacle. It was found that the obstacle (magnetopause) is scaled with the solar wind dynamic pressure and changes its dimensions and shape with the dipole tilt angle and interplanetary magnetic field orientation. …
Study of reconnection-associated multiscale fluctuations with Cluster and Double Star
Zhang, T. L.; Lucek, E.; RèMe, H. +8 more
The objective of the paper is to asses the specific spectral scaling properties of magnetic reconnection associated fluctuations/turbulence at the earthward and tailward outflow regions observed simultaneously by the Cluster and Double Star (TC-2) spacecraft on 26 September 2005. Systematic comparisons of spectral characteristics, including varian…
Heliospheric sector boundaries: Single or multiple?
Neugebauer, Marcia
Solar wind data were examined for a period when the Ulysses spacecraft moved roughly parallel to the boundary between inward and outward interplanetary fields at a solar distance of 1.4 AU. Multiple crossings of the magnetic sector boundary were observed. Three tests were used to evaluate whether or not the crossings were due to multiple crossings…
The relationship between j × B and ∇·Pe in the magnetotail plasma sheet: Cluster observations
Lucek, E.; Fazakerley, A. N.; Owen, C. J. +6 more
In this paper we report an extension to Henderson et al.'s (2006) case study, in which we investigate the generality of the anticorrelation between the ∇·?e and j × B terms in Ohm's law observed in the plasma sheet. Further current sheet crossings are investigated which occurred on 17 August 2003 and 24 September 2003. Data from this pe…
Latitude and local time dependence of ULF wave power at the magnetopause: A Cluster-Double Star study
Belmont, G.; Lucek, E.; Carr, C. +7 more
Strong ULF wave activity has been observed at magnetopause crossings over a long time. Those turbulent like waves are possibly one of the contributors to particle penetration from the solar wind to the magnetosphere through the magnetopause. Spatio Temporal Analysis of Field Fluctuations wave experiments onboard Cluster and Double Star TC1 spacecr…
Global MHD simulation of flux transfer events at the high-latitude magnetopause observed by the Cluster spacecraft and the SuperDARN radar system
Daum, P.; Wild, J. A.; Penz, T. +5 more
A global magnetohydrodynamic numerical simulation is used to study the large-scale structure and formation location of flux transfer events (FTEs) in synergy with in situ spacecraft and ground-based observations. During the main period of interest on the 14 February 2001 from 0930 to 1100 UT the Cluster spacecraft were approaching the Northern Hem…
Prospects for future enhanced solar energetic particle events and the effects of weaker heliospheric magnetic fields
Kahler, S. W.
Recent work based on nitrate abundances in ice cores has shown that large solar energetic (E > 30 MeV) particle (LSEP) events during the spacecraft era of observations (1960-present) are diminished in comparison with those of some preceding eras and that LSEP events have occurred during low cycles of solar activity. McCracken et al. (2004) have…
Revisiting Iapetus following recent Cassini observations
Mendis, D. A.; Axford, W. I.
The recent observations of the Saturnian satellite Iapetus by the Cassini spacecraft support the theory proposed by us, over three decades ago, explaining the large brightness asymmetry between the leading and trailing faces of this synchronous satellite. Here we will revisit the question of the observed brightness variations, with orbital phase, …
Power of magnetopause low-frequency waves: A statistical study
Belmont, G.; Lucek, E.; Rezeau, L. +2 more
ULF fluctuations at the Earth magnetopause have been the subject of a long-standing interest because of their noticeable amplitude and their potential role in plasma penetration through the magnetosphere boundary. Some information on the nature of these fluctuations has already been provided thanks to GEOS and ISEE, and more recently Cluster, case…