Power aspects of processes at the piston shock regionIdentifying blast-wave shocks, which can arise during CME formation, is a much more complex problem. The difference from piston shocks is that a blast-wave shock originates from the explosions that…P. A. Sedykh·Dec 26, 2017SaveLearn
Density Fluctuations in the Solar Wind Driven by Alfvén Wave Parametric DecayMeasurements and simulations of inertial compressive turbulence in the solar wind are characterized by anti-correlated magnetic fluctuations parallel to the mean field and density structures. This…Trevor A. Bowen, Samuel Badman, Petr Hellinger et al.·Dec 23, 2017SaveLearn
The Alfvenic nature of energy transfer mediation in localized, strongly nonlinear Alfven wavepacket collisionsIn space and astrophysical plasmas, violent events or instabilities inject energy into turbulent motions at large scales. Nonlinear interactions among the turbulent fluctuations drive a cascade of…J. L. Verniero, G. G. Howes·Dec 23, 2017SaveLearn
Long-term Attitude Dynamics of Space Debris in Sun-synchronous Orbits: Cassini Cycles and Chaotic StabilizationComprehensive analysis of space debris rotational dynamics is vital for active debris removal missions that require physical capture or de-tumbling of a target. We study the attitude motion of used…Sergey Efimov, Dmitry Pritykin, Vladislav Sidorenko·Dec 22, 2017SaveLearn
Using Forbush decreases to derive the transit time of ICMEs propagating from 1 AU to MarsThe propagation of 15 interplanetary coronal mass ejections (ICMEs) from Earth's orbit (1 AU) to Mars (~ 1.5 AU) has been studied with their propagation speed estimated from both measurements and…Johan L. Freiherr von Forstner, Jingnan Guo, Robert F. Wimmer-Schweingruber et al.·Dec 19, 2017SaveLearn
Analysis of Magnetic Field Variations Produced by Equatorial Electro-JetsThe Equatorial Electrojet (EEJ) is a narrow band of electrons flowing from east to west at daytime at low latitudes. The electron current produces a magnetic field variation that can be measured at…E. López, F. Aldás, A. Yoshikawa·Dec 18, 2017SaveLearn
Localized Oscillatory Dissipation in Magnetopause ReconnectionData from the NASA Magnetospheric Multiscale (MMS) mission are used to investigate asymmetric magnetic reconnection at the dayside boundary between the Earth's magnetosphere and the solar wind…J. L. Burch, R. E. Ergun, P. A. Cassak et al.·Dec 14, 2017SaveLearn
Modelling Solar Energetic Particle transport near a wavy Heliospheric Current SheetUnderstanding the transport of Solar Energetic Particles (SEPs) from acceleration sites at the Sun into interplanetary space and to the Earth is an important question for forecasting space weather.…Markus Battarbee, Silvia Dalla, Mike S. Marsh·Dec 11, 2017SaveLearn
Voyager 1 Measurements Beyond the Heliopause of Galactic Cosmic Ray Helium, Boron, Carbon, Oxygen, Magnesium, Silicon and Iron Nuclei with Energies 0.5 to >1.5 GeV/nucWe have obtained the energy spectra of cosmic ray He, B, C, O, Mg, S and Fe nuclei in the range 0.5-1.5 GeV/nuc and above using the penetrating particle mode of the High Energy Telescope, part of the…W. R. Webber, N. Lal, E. C. Stone et al.·Dec 7, 2017SaveLearn
Automated identification of coronal holes from synoptic EUV mapsCoronal holes (CH) are regions of open magnetic field lines in the solar corona and the source of fast solar wind. Understanding the evolution of coronal holes is critical for solar magnetism as well…Amr Hamada, Timo Asikainen, Ilpo Virtanen et al.·Dec 5, 2017SaveLearn
Cassini CAPS identification of pickup ion compositions at RheaSaturn's largest icy moon, Rhea, hosts a tenuous surface-sputtered exosphere composed primarily of molecular oxygen and carbon dioxide. In this Letter, we examine Cassini Plasma Spectrometer…R. T. Desai, S. A. Taylor, L. H. Regoli et al.·Nov 30, 2017SaveLearn
The Different Shapes of the LIS Energy Spectra of Cosmic Ray He and C Nuclei Below ~1 GeV/nuc and The Cosmic Ray He/C Nuclei Ratio vs. Energy -V1 Measurements and LBM Propagation PredictionsThis paper examines the cosmic ray He and C nuclei spectra below ~1 GeV/nuc, as well as the very rapid increase in the He/C ratio below ~100 MeV/nuc, measured by Voyager 1 beyond the heliopause.…W. R. Webber·Nov 30, 2017SaveLearn
Hybrid Simulations of Positively and Negatively Charged Pickup Ions and Cyclotron Wave Generation at EuropaIn the vicinity of Europa, Galileo observed bursty Alfvén-cyclotron wave power at the gyrofrequencies of a number of species including K+, O2+, Na+, and Cl+, indicating the localised…R. T. Desai, M. M. Cowee, H. Wei et al.·Nov 29, 2017SaveLearn
Acceleration of galactic electrons at the solar wind termination shock and Voyager 1 observationsDiffusive shock acceleration (DSA), as an acceleration process for Galactic electrons at the solar wind termination shock (TS), is investigated with a comprehensive numerical model which incorporates…M. S. Potgieter, P. L. Prinsloo, R. D. Strauss·Nov 29, 2017SaveLearn
Solar modulation of cosmic ray positrons in a very quiet heliosphereSince the beginning of the space exploration era, solar activity was observed at its lowest level during 2006 to 2009. During this period, the PAMELA space experiment observed spectra for galactic…M. S. Potgieter, E. E. Vos, D. Bisschoff et al.·Nov 29, 2017SaveLearn
Intense cross-tail field-aligned currents in the plasma sheet at lunar distancesField-aligned currents in the Earth's magnetotail are traditionally associated with transient plasma flows and strong plasma pressure gradients in the near-Earth side. In this paper we demonstrate a…Sixue Xu, Andrei Runov, Anton Artemyev et al.·Nov 23, 2017SaveLearn
MMS observation of asymmetric reconnection supported by 3-D electron pressure divergenceWe identify a dayside electron diffusion region (EDR) encountered by the Magnetospheric Multiscale (MMS) mission and estimate the terms in generalized Ohm's law that controlled energy conversion near…Kevin J. Genestreti, Ali Varsani, Jim L. Burch et al.·Nov 22, 2017SaveLearn
The Cosmic Ray Boron/Carbon Ratio Measured at Voyager and at AMS-2 from 10 MeV/nuc up to ~1 TeV/nuc and a Comparison With Propagation CalculationsWe have used new measurements of the B/C ratio in galactic cosmic rays at both low and high energies by the Voyager and AMS-2 spacecraft, respectively, along with propagation calculations using a…W. R. Webber, T. L. Villa·Nov 21, 2017SaveLearn
Defunct Satellites in Nearly Polar Orbits: Long-term Evolution of Attitude MotionLow Earth orbits (LEO) are known as a region of high space activity and, consequently, space debris highest density. Launcher upper stages and defunct satellites are the largest space debris objects,…Sergey Efimov, Dmitry Pritykin, Vladislav Sidorenko·Nov 19, 2017SaveLearn
The parametric instability of Alfvén waves: effects of temperature anisotropyWe study the stability of large amplitude, circularly polarized Alfvén waves in an anisotropic plasma described by the double-adiabatic/CGL closure, and in particular the effect of a background…Anna Tenerani, Marco Velli, Petr Hellinger·Nov 17, 2017SaveLearn
Retrieving Instantaneous Field of View and Geophysical Information for Atmospheric Limb Sounding with USGNC Near Real-Time Orbit DataThe Limb-imaging Ionospheric and Thermospheric Extreme-ultraviolet Spectrograph (LITES) experiment is one of thirteen instruments aboard the Space Test Program Houston 5 (STP-H5) payload on the…Laura Cui·Nov 16, 2017SaveLearn
GLE and Sub-GLE Redefinition in the Light of High-Altitude Polar Neutron MonitorsThe conventional definition of ground-level enhancement (GLE) events requires a detection of solar energetic particles (SEP) by at least two differently located neutron monitors. Some places are…S. V. Poluianov, I. G. Usoskin, A. L. Mishev et al.·Nov 15, 2017SaveLearn
Energy harvesters for spaceEnergy harvesting is the fundamental activity in almost all forms of space exploration known to humans. So far, in most cases, it is not feasible to bring, along with probe, spacecraft or rover…Rafał Graczyk·Nov 10, 2017SaveLearn
The Interstellar Formation and Spectra of the Noble Gas, Proton-Bound HeHHe+, HeHNe+, & HeHAr+ ComplexesThe sheer interstellar abundance of helium makes any bound molecules or complexes containing it of potential interest for astrophysical observation. This work utilizes high-level and trusted quantum…Cody J. Stephan, Ryan C. Fortenberry·Nov 9, 2017SaveLearn
Project Lyra: Sending a Spacecraft to 1I/'Oumuamua (former A/2017 U1), the Interstellar AsteroidThe first definitely interstellar object 1I/'Oumuamua (previously A/2017 U1) observed in our solar system provides the opportunity to directly study material from other star systems. Can such objects…Andreas M. Hein, Nikolaos Perakis, T. Marshall Eubanks et al.·Nov 8, 2017SaveLearn