Solar wind charge exchange in cometary atmospheres. I. Charge-changing and ionization cross sections for He and H particles in H2OSolar wind charge-changing reactions are of paramount importance to the physico-chemistry of the atmosphere of a comet, mass-loading the solar wind through an effective conversion of fast light solar…Cyril Simon Wedlund, Dennis Bodewits, Markku Alho et al.·Feb 13, 2019SaveLearn
Project Lyra: Catching 1I/'Oumuamua - Mission Opportunities After 2024In October 2017, the first interstellar object within our solar system was discovered. Today designated 1I/'Oumuamua, it shows characteristics that have never before been observed in a celestial…Adam Hibberd, Andreas M. Hein, T. Marshall Eubanks·Feb 13, 2019SaveLearn
Direct observations of a surface eigenmode of the dayside magnetopauseThe abrupt boundary between a magnetosphere and the surrounding plasma, the magnetopause, has long been known to support surface waves. It was proposed that impulses acting on the boundary might lead…M. O. Archer, H. Hietala, M. D. Hartinger et al.·Feb 12, 2019SaveLearn
Solar wind charge exchange in cometary atmospheres III. Results from the Rosetta mission to comet 67P/Churyumov-GerasimenkoSolar wind charge-changing reactions are of paramount importance to the physico-chemistry of the atmosphere of a comet. The ESA/Rosetta mission to comet 67P/Churyumov-Gerasimenko (67P) provides a…Cyril Simon Wedlund, Etienne Behar, Hans Nilsson et al.·Feb 12, 2019SaveLearn
Two-Line Element Estimation Using Machine LearningTwo-line elements are widely used for space operations to predict the orbit with a moderate accuracy for 2-3 days. Local optimization methods, such as the nonlinear least squares method with…Rasit Abay, Sudantha Balage, Melrose Brown et al.·Feb 11, 2019SaveLearn
Low Cost Radiation Hardened Software and Hardware Implementation for CubeSatsCubeSats are small satellites used for scientific experiments because they cost less than full sized satellites. Each CubeSat uses an on-board computer. The on-board computer performs sensor…Brosnan Yuen, Mihai Sima·Feb 11, 2019SaveLearn
Spectral Analysis of the September 2017 Solar Energetic Particle EventsAn interval of exceptional solar activity was registered in early September 2017, late in the decay phase of solar cycle 24, involving the complex Active Region 12673 as it rotated across the western…A. Bruno, E. R. Christian, G. A. de Nolfo et al.·Feb 11, 2019SaveLearn
The multi-scale nature of the solar windThe solar wind is a magnetized plasma and as such exhibits collective plasma behavior associated with its characteristic spatial and temporal scales. The characteristic length scales include the size…Daniel Verscharen, Kristopher G. Klein, Bennett A. Maruca·Feb 9, 2019SaveLearn
Predictions for the First Parker Solar Probe EncounterWe examine Alfv\'en Wave Solar atmosphere Model (AWSoM) predictions of the first Parker Solar Probe (PSP) encounter. We focus on the 12-day closest approach centered on the 1st perihelion. AWSoM (van…B. van der Holst, W. B. Manchester, K. G. Klein et al.·Feb 8, 2019SaveLearn
Solar energetic particle propagation in wave turbulence and the possibility of wave generationA complete theory for the complex interaction between solar energetic particles and the turbulent interplanetary magnetic field remains elusive. In this work we aim to contribute towards such a…R. D. Strauss, J. A. le Roux·Feb 6, 2019SaveLearn
Physical mechanism of reconnection onset in space plasmasMagnetic reconnection plays a crucial role in large dissipative events in space plasmas, such as solar flares and geomagnetic substorms, but there has been much confusion regarding reconnection onset…M. Ugai·Feb 5, 2019SaveLearn
Electron energy partition across interplanetary shocks: I. Methodology and Data ProductAnalysis of 15314 electron velocity distribution functions (VDFs) within 2 hours of 52 interplanetary (IP) shocks observed by the Wind spacecraft near 1 AU are introduced. The electron…Lynn B. Wilson, Li-Jen Chen, Shan Wang et al.·Feb 4, 2019SaveLearn
On the statistics of acceleration and loss of relativistic electrons in the outer radiation belt: a superposed epoch analysisWe investigate the response of the outer Van Allen belt electrons to various types of solar wind and magnetospheric disturbances. We use electron phase space density (PSD) calculations as well as…Christos Katsavrias, Ioannis A. Daglis, Wen Li·Feb 3, 2019SaveLearn
Highly relativistic electron flux enhancement during the weak geomagnetic storm of April-May 2017We report observations of energetic electron flux and Phase Space Density (PSD) to show that a relatively weak magnetic storm with Sym-Hmin ≈ -50 nT, resulted in a relativistic and…Christos Katsavrias, Ingmar Sandberg, Wen Li et al.·Feb 3, 2019SaveLearn
Ready functions for calculating the Martian radiation environmentIt is extremely important to understand and model the Martian radiation environment in preparation for future human missions to Mars, especially during extreme and elevated conditions such as an…Jingnan Guo, Robert F. Wimmer-Schweingruber, Manuel Grande et al.·Feb 1, 2019SaveLearn
Turbulence-driven ion beams in the magnetospheric Kelvin-Helmholtz instabilityThe description of the local turbulent energy transfer, and the high-resolution ion distributions measured by the Magnetospheric Multiscale mission, together provide a formidable tool to explore the…Luca Sorriso-Valvo, Filomena Catapano, Alessandro Retinò et al.·Jan 31, 2019SaveLearn
The Interplay of the Solar Wind Core and Suprathermal Electrons: A Quasilinear Approach for Firehose InstabilityIn the solar wind an equipartition of kinetic energy densities can be easily established between thermal and suprathermal electrons and the instability conditions are markedly altered by the…S. M. Shaaban, M. Lazar, P. H. Yoon et al.·Jan 31, 2019SaveLearn
Role of reconnection in inertial kinetic-Alfven turbulenceIn a weakly collisional, low-electron-beta plasma, large-scale Alfv\'en turbulence transforms into inertial kinetic-Alfv\'en turbulence at scales smaller than the ion microscale (gyroscale or…Stanislav Boldyrev, Nuno F. Loureiro·Jan 29, 2019SaveLearn
Generic magnetic field intensity profiles of interplanetary coronal mass ejections at Mercury, Venus and Earth from superposed epoch analysesWe study interplanetary coronal mass ejections (ICMEs) measured by probes at different heliocentric distances (0.3-1AU) to investigate the propagation of ICMEs in the inner heliosphere and determine…Miho Janvier, Reka Winslow, Simon Good et al.·Jan 28, 2019SaveLearn
Particle-in-Cell Simulations of Plasma Dynamics in Cometary EnvironmentWe perform and analyze global Particle-in-Cell (PIC) simulations of the interaction between solar wind and an outgassing comet with the goal of studying the plasma kinetic dynamics of a cometary…Chaitanya Prasad Sishtla, Vyacheslav Olshevsky, Steven W. D. Chien et al.·Jan 28, 2019SaveLearn
Modelling three-dimensional transport of solar energetic protons in a corotating interaction region generated with EUHFORIAWe introduce a new solar energetic particle (SEP) transport code that aims at studying the effects of different solar wind configurations on SEP events. We focus on the influence of varying solar…N. Wijsen, A. Angels, J. Pomoell et al.·Jan 28, 2019SaveLearn
Transition from ion-coupled to electron-only reconnection: Basic physics and implications for plasma turbulenceUsing kinetic particle-in-cell (PIC) simulations, we simulate reconnection conditions appropriate for the magnetosheath and solar wind, i.e., plasma beta (ratio of gas pressure to magnetic pressure)…P. Sharma Pyakurel, M. A. Shay, T. D. Phan et al.·Jan 28, 2019SaveLearn
End to End Satellite Servicing and Space Debris ManagementThere is growing demand for satellite swarms and constellations for global positioning, remote sensing and relay communication in higher LEO orbits. This will result in many obsolete, damaged and…Aman Chandra, Himangshu Kalita, Roberto Furfaro et al.·Jan 25, 2019SaveLearn
Solar wind charge exchange in cometary atmospheres. II. Analytical modelSolar wind charge-changing reactions are of paramount importance to the physico-chemistry of the atmosphere of a comet because they mass-load the solar wind through an effective conversion of fast,…Cyril Simon Wedlund, E. Behar, E. Kallio et al.·Jan 23, 2019SaveLearn
Comments on "Cavitons and spontaneous hot flow anomalies in a hybrid-Vlasov global magnetospheric simulation" by Blanco-Cano et al. (2018)Blanco-Cano et al. (2018) intended to find a type of transient event in the solar wind before the terrestrial bow shock using a special type of simulation. However, the simulation results cannot…Gábor Facskó·Jan 22, 2019SaveLearn