Search Publications
Solar Orbiter Data-Model Comparison in Venus' Induced Magnetotail
Jarvinen, Riku; Kallio, Esa; Edberg, Niklas J. T. +5 more
We investigate the structure of the Venusian magnetotail utilizing magnetic field and electron density measurements that cover a wide range of distances from the planet, from the first two Solar Orbiter Venus flybys. We examine the magnetic field components along the spacecraft trajectory up to 80 Venus radii down the tail. Even though the magneti…
Solar Wind Protons in the Diamagnetic Cavity at Comet 67P/Churyumov-Gerasimenko
Nilsson, Hans; Goetz, Charlotte; Volwerk, Martin +5 more
The plasma environment at a comet can be divided into different regions with distinct plasma characteristics. Two such regions are the solar wind ion cavity, which refers to the part of the outer coma that does not contain any solar wind ions anymore; and the diamagnetic cavity, which is the region of unmagnetized plasma in the innermost coma. Fro…
Sub-Auroral Flows and Associated Magnetospheric and Ionospheric Phenomena Developed During 7-8 September 2017
Horvath, Ildiko; Lovell, Brian C.
This study investigates the Sub-Auroral Polarization Streams (SAPS) and Sub-Auroral Ion Drifts (SAID) along with the associated magnetospheric and ionospheric phenomena developed during 7-8 September 2017. Then, a series of substorms occurred before and during the geomagnetic storm (SYM-Hmin = -146 nT). Results are obtained by utilizing…
The Cluster Virtual Observatory for ULF Waves
Richter, I.; Glassmeier, K. H.; Plaschke, F. +3 more
Since its launch in 2000, the Cluster fleet visited a vast domain of the circum-terrestrial environment, from the upstream solar wind and the distant tail, down to the plasmasphere, scanning in detail all magnetospheric regions during over two solar cycles. This led to an unprecedentedly rich data collection of multi-point measurements which will …
The Structure of the Warped Io Plasma Torus Constrained by the Io Footprint
Saur, Joachim; Schlegel, Stephan
Standard models of force balance along Jovian field lines predict the location of the Io Plasma Torus to be the centrifugal equator of Jupiter's magnetosphere, that is, the position along the magnetic field lines farthest away from Jupiter's rotational axis. In many models, the centrifugal equator is assumed to lay on a plane, calculated from a (s…
The Link Between Individual Velocities in the Incident Plasma Flow and Ion Populations Upstream of Collisionless Shocks
Wilkinson, W. P.; Humphreys, M.; Kilgallon, S.
The interaction of the solar wind with Earth's bow shock gives rise to several distinct ion populations upstream and downstream of the shock. Using numerical computation of trajectories in the de Hoffmann-Teller frame of reference and previous analytical results, we investigate whether membership of these populations is determined by a particle's …
Magnetopause Dynamics at Saturn as Observed by Cassini
Allen, Robert C.; Mo, Wenli; Paranicas, Chris +2 more
The occurrence and impacts of magnetopause processes at outer planets, particularly magnetic reconnection and the Kelvin-Helmholtz instability (KHI), remains unresolved. From a list of 2,114 magnetopause crossings at Saturn spanning the full duration of the Cassini mission, magnetic field and low-energy plasma properties are analyzed for each cros…
Identifying the Variety of Jovian X-Ray Auroral Structures: Tying the Morphology of X-Ray Emissions to Associated Magnetospheric Dynamics
Jackman, C. M.; Kurth, W. S.; Branduardi-Raymont, G. +12 more
We define the spatial clustering of X-rays within Jupiter's northern auroral regions by classifying their distributions into "X-ray auroral structures." Using data from Chandra during Juno's main mission observations (24 May 2016 to 8 September 2019), we define five X-ray structures based on their ionospheric location and calculate the distributio…
On the Relation Between Auroral Morphologies and Compression Conditions of Jupiter's Magnetopause: Observations From Juno and the Hubble Space Telescope
Hospodarsky, G. B.; Kurth, W. S.; Bonfond, B. +11 more
Jupiter displays the most powerful auroral emissions in our solar system, which result from strong energy dissipation in Jupiter's surrounding space environment. Although mass and energy in Jupiter's magnetosphere mostly come from the innermost Galilean moon Io's volcanic activity and Jupiter's rotation, solar wind perturbations can play crucial r…
The Drivers of the Martian Bow Shock Location: A Statistical Analysis of Mars Atmosphere and Volatile EvolutioN and Mars Express Observations
Garnier, P.; Génot, V.; Halekas, J. S. +6 more
The Martian interaction with the solar wind leads to the formation of a bow shock upstream of the planet. The shock dynamics appear complex, due to the combined influence of external and internal drivers. The extreme ultraviolet fluxes and magnetosonic Mach number are known major drivers of the shock location, while the influence of other possible…