Search Publications
Deriving CME Density From Remote Sensing Data and Comparison to In Situ Measurements
Temmer, M.; Veronig, A. M.; Vršnak, B. +8 more
We determine the three dimensional geometry and deprojected mass of 29 well observed coronal mass ejections (CMEs) and their interplanetary counterparts (ICMEs) using combined Solar Terrestrial Relations Observatory Solar and Heliospheric Observatory white light data. From the geometry parameters, we calculate the volume of the CME for the magneti…
Chromospheric Heating by Magnetohydrodynamic Waves and Instabilities
Srivastava, A. K.; Murawski, K.; Cally, P. S. +7 more
The importance of the chromosphere in the mass and energy transport within the solar atmosphere is now widely recognized. This review discusses the physics of magnetohydrodynamic waves and instabilities in large-scale chromospheric structures as well as in magnetic flux tubes. We highlight a number of key observational aspects that have helped our…
Magnetic Structure and Propagation of Two Interacting CMEs From the Sun to Saturn
Provan, Gabrielle; Möstl, Christian; Futaana, Yoshifumi +14 more
One of the grand challenges in heliophysics is the characterization of coronal mass ejection (CME) magnetic structure and evolution from eruption at the Sun through heliospheric propagation. At present, the main difficulties are related to the lack of direct measurements of the coronal magnetic fields and the lack of 3D in-situ measurements of the…
Curlometer Technique and Applications
Eastwood, J. P.; Dunlop, M. W.; Shen, C. +9 more
We review the range of applications and use of the curlometer, initially developed to analyze Cluster multi-spacecraft magnetic field data; but more recently adapted to other arrays of spacecraft flying in formation, such as MMS small-scale, 4-spacecraft configurations; THEMIS close constellations of 3-5 spacecraft, and Swarm 2-3 spacecraft config…
The Polar Cusp Seen by Cluster
Pitout, F.; Bogdanova, Y. V.
The investigation of the magnetospheric polar cusps was one of the main objectives of the Cluster mission. The four satellites have crossed those regions numerous times over the years and, with their suitable instrumentation, favorable orbits, and unique multipoint measurements, many aspects of the cusp have been unveiled. The first of those is it…
Electrostatic Solitary Waves in the Earth's Bow Shock: Nature, Properties, Lifetimes, and Origin
Russell, C. T.; Bale, S. D.; Khotyaintsev, Y. +10 more
We present a statistical analysis of >2,100 bipolar electrostatic solitary waves (ESWs) collected from 10 quasi-perpendicular Earth's bow shock crossings by Magnetospheric Multiscale spacecraft. We developed and implemented a correction procedure for reconstruction of actual electric fields, velocities, and other properties of ESW, whose spatia…
Measurement of Magnetic Field Fluctuations in the Parker Solar Probe and Solar Orbiter Missions
Maksimovic, M.; Bale, S. D.; Krasnoselskikh, V. +17 more
The search coil magnetometer (SCM) measures the magnetic signature of solar wind fluctuations with three components in the 3 Hz-50 kHz range and one single component in the 1 kHz-1 MHz range. This instrument is important for providing in situ observations of transients caused by interplanetary shocks and reconnection, for the identification of ele…
Classifying the Magnetosheath Behind the Quasi-Parallel and Quasi-Perpendicular Bow Shock by Local Measurements
Nilsson, H.; Karlsson, T.; Raptis, S. +1 more
We investigate and evaluate the possibility of using local magnetosheath measurements to classify the plasma according to upstream conditions. In order to do this, we use simultaneous measurements from the Cluster spacecraft from time intervals when one of them is located in the solar wind, and the other in the magnetosheath. In particular, we stu…
An Unexpected Whistler Wave Generation Around Dipolarization Front
Wang, Z.; Chen, L.; Zhang, Y. +8 more
Dipolarization front (DF)—a sharp boundary separating hot tenuous plasmas from cold dense plasmas—is followed by a strong Bz region, which is termed flux pileup region (FPR) or dipolarizing flux bundle (DFB). Using 9 year (2001-2009) Cluster data, we show that the FPR hosts whistler waves because of the pancake distribution of electrons…
A Preliminary Study of Magnetosphere-Ionosphere-Thermosphere Coupling at Jupiter: Juno Multi-Instrument Measurements and Modeling Tools
Gérard, Jean-Claude; André, Nicolas; Louarn, Philippe +20 more
The dynamics of the Jovian magnetosphere are controlled by the interplay of the planet's fast rotation, its main iogenic plasma source and its interaction with the solar wind. Magnetosphere-Ionosphere-Thermosphere (MIT) coupling processes controlling this interplay are significantly different from their Earth and Saturn counterparts. At the ionosp…