Acceleration of solar wind particles by traveling interplanetary shocksThe acceleration of thermal solar wind protons at spherical interplanetary shocks driven by coronal mass ejections is investigated. The solar wind velocity distribution is represented using…P. L. Prinsloo, R. D. Strauss, J. A. le Roux·May 21, 2019SaveLearn
Self-Similarity of ICME Flux Ropes: Observations by Radially Aligned Spacecraft in the Inner HeliosphereInterplanetary coronal mass ejections (ICMEs) are a significant feature of the heliospheric environment and the primary cause of adverse space weather at the Earth. ICME propagation, and the…S. W. Good, E. K. J. Kilpua, A. T. LaMoury et al.·May 17, 2019SaveLearn
First Results of Arar-Magnetometer Station in Saudi ArabiaThis paper presents the first results of a new Arar-magnetometer station located (Geographic Coordinates: 30 58.5 N, 41 2.3 E) at Northern Border University in Saudi Arabia. The geomagnetic response…Moqbil S. Alenazi, Ayman Mahrous, Ibrahim Fathy et al.·May 13, 2019SaveLearn
Parallel-propagating Fluctuations at Proton-kinetic Scales in the Solar Wind are Dominated by Kinetic InstabilitiesWe use magnetic helicity to characterise solar wind fluctuations at proton-kinetic scales from Wind observations. For the first time, we separate the contributions to helicity from fluctuations…Lloyd D. Woodham, Robert T. Wicks, Daniel Verscharen et al.·May 13, 2019SaveLearn
Forecasting the Ambient Solar Wind with Numerical Models: I. On the Implementation of an Operational FrameworkThe ambient solar wind conditions in interplanetary space and in the near-Earth environment are determined by activity on the Sun. Steady solar wind streams modulate the propagation behaviour of…Martin A. Reiss, Peter J. MacNeice, Leila M. Mays et al.·May 10, 2019SaveLearn
Reynolds Number and Intermittency in the Expanding Solar Wind: Predictions Based on Voyager ObservationsThe large scale features of the solar wind are examined in order to predict small scale features of turbulence in unexplored regions of the heliosphere. The strategy is to examine how system size, or…Tulasi N. Parashar, Manuel Cuesta, William H. Matthaeus·May 8, 2019SaveLearn
Galactic cosmic ray hydrogen spectra and radial gradients in the inner heliosphere measured by the HELIOS Experiment 6Context: The HELIOS solar observation probes provide unique data regarding their orbit and operation time. One of the onboard instruments, the Experiment 6 (E6), is capable of measuring ions from 4…Johannes Marquardt, Bernd Heber·May 3, 2019SaveLearn
Electron acceleration and small scale coherent structures formation by an Alfv\'en wave propagating in coronal interplume regionWe use 2.5-D electromagnetic particle-in-cell simulation code to investigate the acceleration of electrons in solar coronal holes through the interaction of Alfv\'en waves with an interplume region.…Khalil Daiffallah, Fabrice Mottez·Apr 27, 2019SaveLearn
Numerical Algorithm for Detecting Ion Diffusion Regions in the Geomagnetic Tail with Applications to MMS Tail Season May 1 -- September 30, 2017We present a numerical algorithm aimed at identifying ion diffusion regions (IDRs) in the geomagnetic tail, and test its applicability. We use 5 criteria applied in three stages. (i) Correlated…A. J. Rogers, C. J. Farrugia, R. B. Torbert·Apr 24, 2019SaveLearn
Shear flow-interchange instability in nightside magnetotail causes auroral beads as a signature of substorm onsetA geometric wedge model of the near-earth nightside plasma sheet is used to derive a wave equation for low frequency shear flow-interchange waves which transmit E × B sheared zonal…Jason Derr, Wendell Horton, Richard Wolf·Apr 24, 2019SaveLearn
Tracking and Validating ICMEs Propagating Toward Mars Using STEREO Heliospheric Imagers Combined With Forbush Decreases Detected by MSL/RADThe Radiation Assessment Detector (RAD) instrument onboard the Mars Science Laboratory (MSL) mission's Curiosity rover has been measuring galactic cosmic rays (GCR) as well as solar energetic…Johan L. Freiherr von Forstner, Jingnan Guo, Robert F. Wimmer-Schweingruber et al.·Apr 24, 2019SaveLearn
Structure and evolution of the photospheric magnetic field in 2010 - 2017: comparison of SOLIS/VSM vector field and BLOS potential fieldThe line-of-sight (LOS) component of the large-scale photospheric magnetic field has been observed since the 1950s, but the daily full-disk observations of the full vector magnetic field started only…Ilpo I. Virtanen, Alexei A. Pevtsov, Kalevi Mursula·Apr 24, 2019SaveLearn
Why do some probabilistic forecasts lack reliability?In this work, we investigate the reliability of the probabilistic binary forecast. We mathematically prove that a necessary, but not sufficient, condition for achieving a reliable probabilistic…Yûki Kubo·Apr 18, 2019SaveLearn
Role of magnetic field curvature in magnetohydrodynamic turbulenceMagnetic field are transported and tangled by turbulence, even as they lose identity due to nonideal or resistive effects. On balance field lines undergo stretch-twist-fold processes. The curvature…Yan Yang, Minping Wan, William H. Matthaeus et al.·Apr 17, 2019SaveLearn
Scattering of Strahl Electrons in the Solar Wind between 0.3 and 1 au: Helios ObservationsElectron velocity distribution functions in the solar wind according to standard models consist of 4 components, of which 3 are symmetric - the core, the halo, and the superhalo, and one is magnetic…L. Bercic, M. Maksimovic, S. Landi et al.·Apr 17, 2019SaveLearn
Effects of Electromagnetic Acceleration on the StarOne C1 Satellite Using Planar Antenna ArrayArtificial satellites perform downlink communication or transmission with earth stations. These transmissions are made from an array of antennas chosen to increase directivity and gain in the…Armando Heilmann, Cesar A. Dartora, Horacio Tertuliano Filho et al.·Apr 16, 2019SaveLearn
Studying dawn-dusk asymmetries of Mercury's magnetotail using MHD-EPIC simulationsMESSENGER has observed a lot of dawn-dusk asymmetries in Mercury's magnetotail, such as the asymmetries of the cross-tail current sheet thickness and the occurrence of flux ropes, dipolarization…Yuxi Chen, Gabor Toth, Xianzhe Jia et al.·Apr 14, 2019SaveLearn
Quasilinear approach of the cumulative whistler instability in fast solar winds: Constraints of electron temperature anisotropyContext. Solar outflows are a considerable source of free energy which accumulates in multiple forms like beaming (or drifting) components and/or temperature anisotropies. However, kinetic…S. M. Shaaban, M. Lazar, P. H. Yoon et al.·Apr 12, 2019SaveLearn
Forbush decreases and < 2-day GCR flux non-recurrent variations studied with LISA PathfinderNon-recurrent short term variations of the galactic cosmic-ray (GCR) flux above 70 MeV n-1 were observed between 2016 February 18 and 2017 July 3 aboard the European Space Agency LISA Pathfinder…C. Grimani, M. Armano, H. Audley et al.·Apr 9, 2019SaveLearn
Explicit IMF By-effect maximizes at subauroral latitudes (Dedicated to the memory of Eigil Friis-Christensen)The most important parameter in the coupling between solar wind and geomagnetic activity is the Bz-component of the interplanetary magnetic field (IMF). However, recent studies have shown that IMF…Lauri Holappa, Nat Gopalswamy, Kalevi Mursula·Apr 9, 2019SaveLearn
Inferring source properties of monoenergetic electron precipitation from kappa and Maxwellian moment-voltage relationshipsWe present two case studies of FAST electrostatic analyzer measurements of both highly nonthermal ( ~2.5) and weakly nonthermal/thermal monoenergetic electron precipitation at…Spencer Hatch, Jim LaBelle, Chris Chaston·Apr 5, 2019SaveLearn
Global Ten-Moment Multifluid Simulations of the Solar Wind Interaction with Mercury: From the Planetary Conducting Core to the Dynamic MagnetosphereFor the first time, we explore the tightly coupled interior-magnetosphere system of Mercury by employing a three-dimensional ten-moment multifluid model. This novel fluid model incorporates the…Chuanfei Dong, Liang Wang, Ammar Hakim et al.·Apr 4, 2019SaveLearn
Interstellar medium parameters in front of the external bow shockWe know that it is the front of the bow shock where the solar wind kinetic energy flux is transformed into the other kinds the most intensively. In our previous studies, we obtained important…P. A. Sedykh·Apr 4, 2019SaveLearn
Validation of the neutron monitor yield function using data from AMS-02 experiment, 2011--2017The newly published spectra of protons and helium over time directly measured in space by the AMS-02 experiment for the period 2011--2017 provide a unique opportunity to calibrate ground-based…Sergey A. Koldobskiy, Veronica Bindi, Claudio Corti et al.·Apr 3, 2019SaveLearn
Attitude and orbit coupling of planar helio-stable solar sailsThe coupled attitude and orbit dynamics of solar sails is studied. The shape of the sail is a simplified quasi-rhombic-pyramid that provides the structure helio-stablility properties. After…Narcis Miguel, Camilla Colombo·Mar 31, 2019SaveLearn