Search Publications
Global Magnetosphere Response to Solar Wind Dynamic Pressure Pulses During Northward IMF Using the Heliophysics System Observatory
Moldwin, M. B.; Vidal-Luengo, S. E.
We analyzed the magnetospheric global response to dynamic pressure pulses (DPPs) using the Heliophysics System Observatory (HSO) and ground magnetometers. During northward Interplanetary Magnetic Field (IMF) Bz conditions, the magnetosphere acts as a closed "cavity" and reacts to solar wind DPPs more simply than during southward IMF. In this study…
The Structure of the Cusp Diamagnetic Cavity and Test Particle Energization in the GAMERA Global MHD Simulation
Merkin, V.; Otto, A.; Nykyri, K. +4 more
Electrons with energies ≥40 keV can be found at low density in many different regions of Earth's magnetosphere. A litany of fundamental questions in space physics have focused on the acceleration mechanism of these particles, given that the sources of plasma are the relatively cool ionosphere and solar wind (∼1-100s eV). Upgraded global solar wind…
Morphology of Jupiter's Polar Auroral Bright Spot Emissions via Juno UVS Observations
Bonfond, B.; Vogt, M. F.; Gérard, J. -C. +12 more
Since 2016, the Juno UVS (Ultraviolet Spectrograph) instrument has been taking spectral images of Jupiter's auroras in their full extent, including the nightside, which cannot be viewed from Earth. We present a systematic analysis of features in Jupiter's polar auroras called auroral bright spots, which were observed by Juno UVS during the first 2…
Simultaneous Observation of an Auroral Dawn Storm With the Hubble Space Telescope and Juno
Wilson, R. J.; Kurth, W. S.; Bagenal, F. +7 more
On July 13, 2016, the Hubble Space Telescope observed the onset of a dawn storm in Jupiter's northern ultraviolet aurora, while the NASA Juno spacecraft simultaneously traversed the dawnside outer magnetosphere. This represents the first concurrent auroral and in situ magnetospheric observations of the onset of a dawn storm at Jupiter. Mapping the…
Cluster Multi-Probing of the Aurora During Two Decades
Lindqvist, Per-Arne; Marklund, Göran
The Cluster spacecraft, launched in the year 2000, were pioneers using multi-point measurements to explore the dynamic space plasma environment of Earth. This capability offered a new, powerful approach to study in situ fundamental space plasma processes of the solar-terrestrial interaction. Although not a major science objective of the mission, t…
The 3D Structure of Saturn Magnetospheric Neutral Tori Produced by the Enceladus Plumes
Richardson, John D.; Smith, Howard Todd
This research provides updated and validated spatial distributions of Enceladus generated H2O, OH, and O neutral tori. These tori are produced by the primary neutral source, Enceladus, and consist of populations of coorbiting neutral particles that provide the bulk of heavy molecules to Saturn's (neutral particle dominant) magnetosphere…
Magnetic Reconnection Inside Solar Wind Rotational Discontinuity During Its Interaction With the Quasi-Perpendicular Bow Shock and Magnetosheath
Wang, Xueyi; Lin, Yu; Du, Aimin +1 more
Using a three-dimensional global hybrid simulation, we investigate the formation and evolution of ion-scale magnetic reconnection inside an interplanetary rotational discontinuity (RD) owing to its interaction with the quasi-perpendicular (Q-⊥) bow shock and the magnetosphere. The interplanetary magnetic field (IMF) is initially predominantly nort…
A Complete Data Set of Equatorial Projections of Saturn's Energetic Neutral Atom Emissions Observed by Cassini-INCA
Mitchell, D. G.; Paranicas, C.; Badman, S. V. +3 more
Observations of energetic neutral atoms (ENAs) are a useful tool for analyzing ion and neutral abundances in planetary magnetospheres. They are created when hot plasma, originating for example from magnetic reconnection sites, charge-exchanges with the ambient neutral population surrounding the planet. The motion of ENAs is not governed by the mag…
Discovery of Alfvén Waves Planetward of Saturn's Rings
Dougherty, M. K.; Cao, H.; Southwood, D. J. +3 more
Between April and September 2017 in the final stages of the Cassini Saturn Orbiter mission the spacecraft executed 22 orbits passing planetward of the innermost ring, the D ring. During all periapsis passes oscillations were detected in the azimuthal magnetic field components on typical time scales of a few minutes. We argue that these time varyin…
A Single Point Method to Quantitatively Diagnose the Magnetotail Flapping Motion
Wei, Y.; Rong, Z. J.; Shen, C. +4 more
Quantitatively estimating magnetotail flapping motion is critical for understanding and characterizing its dynamical behaviors. Such estimation can be achieved in principle by the multipoint analysis of spacecraft tetrahedron, for example, Cluster or MMS mission, but, owing to the inability of single point measurement to separate the spatial tempo…