Search Publications
Global-MHD Simulations Using MagPIE: Impact of Flux Transfer Events on the Ionosphere
Strugarek, Antoine; Vaidya, Bhargav; Paul, Arghyadeep
This study presents a recently developed two-way coupled magnetosphere-ionosphere model named "MagPIE" that enables the investigation of the impact of flux transfer events (FTEs) on the ionosphere. Our findings highlight the prominent role of cusp-FTE reconnection in influencing the ionosphere. The typical morphology of an FTE signal, represented …
The Effects of the Polar Rain on the Polar Wind Ion Outflow From the Nightside Ionosphere
Rong, Zhaojin; Wang, Jing; Yang, Qian +7 more
The polar wind, consisting of low-energy ions and electrons, is an outflow along the open magnetic field lines from the polar cap ionosphere to the magnetosphere. Previous studies found that both solar radiation and solar wind electromagnetic energy are the two main energy sources for the polar wind. The polar rain, being field-aligned precipitati…
Energization of Cold Protons and Helium Ions by EMIC Waves in the Inner Magnetosphere: Hybrid Simulations
Lee, Ensang; Min, Kyungguk; Kwon, Jong-Woo +3 more
Electromagnetic ion cyclotron (EMIC) waves generated by hot anisotropic (T⊥ > T∥) protons (∼10-100 keV), play an important role in accelerating cold (<1 eV) protons (H+) and helium (He+) ions in the magnetosphere. Using a hybrid code with parameters found in the inner magnetosphere, we examine when…
Multipoint Cluster Observations of Kinetic Alfvén Waves, Electron Energization, and O+ Ion Outflow Response in the Mid-Altitude Cusp Associated With Solar Wind Pressure and/or IMF BZ Variations
Chaston, Christopher C.; Hull, Arthur J.; Damiano, Peter A.
We report the properties of low frequency (LF) electromagnetic fluctuations (≤11 Hz) in relation to input electron and ion outflow response observed by Cluster in the mid-altitude cusp during high solar wind dynamic pressure PSW and active magnetospheric conditions (Kp = 4+). The multipoint observations reveal the dynamic int…
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 …