Magnetic field kinks and folds in the solar windParker Solar Probe (PSP) observations during its first encounter at 35.7 R have shown the presence of magnetic field lines which are strongly perturbed to the point that they produce local…Anna Tenerani, Marco Velli, Lorenzo Matteini et al.·Dec 6, 2019SaveLearn
New test of Lorentz invariance using the MICROSCOPE space missionWe use data from the T-SAGE instrument on board the MICROSCOPE space mission to search for Lorentz violation in matter-gravity couplings as described by the Lorentz violating Standard-Model Extension…Hélène Pihan-le Bars, Christine Guerlin, Aurélien Hees et al.·Dec 6, 2019SaveLearn
Enhanced Energy Transfer Rate in Solar Wind Turbulence Observed near the Sun from Parker Solar ProbeDirect evidence of an inertial-range turbulent energy cascade has been provided by spacecraft observations in heliospheric plasmas. In the solar wind, the average value of the derived heating rate…Riddhi Bandyopadhyay, M. L. Goldstein, B. A. Maruca et al.·Dec 6, 2019SaveLearn
The Near-Sun Dust Environment: Initial Observations from Parker Solar ProbeThe Parker Solar Probe (PSP) spacecraft has flown into the most dense and previously unexplored region of our solar system's zodiacal cloud. While PSP does not have a dedicated dust detector,…J. R. Szalay, P. Pokorný, S. D. Bale et al.·Dec 5, 2019SaveLearn
Predicting the Solar Wind at Parker Solar Probe Using an Empirically Driven MHD ModelSince the launch on 2018/08/12, Parker Solar Probe (PSP) has completed its first and second orbits around the Sun, having reached down to 35.7 solar radii at each perihelion. In anticipation of the…T. K. Kim, N. V. Pogorelov, C. N. Arge et al.·Dec 5, 2019SaveLearn
Turbulence Transport Modeling and First Orbit Parker Solar Probe (PSP) ObservationsParker Solar Probe (PSP) achieved its first orbit perihelion on November 6, 2018, reaching a heliocentric distance of about 0.165 au (35.55 R). Here, we study the evolution of fully developed…Laxman Adhikari, Gary P. Zank, Lingling Zhao et al.·Dec 5, 2019SaveLearn
Identification of Magnetic Flux Ropes from Parker Solar Probe Observations during the First EncounterThe Parker Solar Probe (PSP) observed an interplanetary coronal mass ejection (ICME) event during its first orbit around the sun, among many other events. This event is analyzed by applying a wavelet…L. -L. Zhao, G. P. Zank, L. Adhikari et al.·Dec 5, 2019SaveLearn
Energetic Particle Observations from Parker Solar Probe using Combined Energy Spectra from the IS Instrument SuiteThe Integrated Science Investigations of the Sun (IS) instrument suite includes two Energetic Particle instruments: EPI-Hi, designed to measure ions from ~1-200 MeV/nuc, and EPI-Lo, designed…C. J. Joyce, D. J. McComas, E. R. Christian et al.·Dec 5, 2019SaveLearn
A gray-box model for a probabilistic estimate of regional ground magnetic perturbations: Enhancing the NOAA operational Geospace model with machine learningWe present a novel algorithm that predicts the probability that the time derivative of the horizontal component of the ground magnetic field dB/dt exceeds a specified threshold at a given location.…Enrico Camporeale, M. D. Cash, H. J. Singer et al.·Dec 2, 2019SaveLearn
Scaling of magnetic reconnection with a limited x-line extentContrary to all the 2D models, where the reconnection x-line extent is infinitely long, we study magnetic reconnection in the opposite limit. The scaling of the average reconnection rate and outflow…Kai Huang, Yi-Hsin Liu, Quanming Lu et al.·Dec 2, 2019SaveLearn
Global-scale Observations and Modeling of Far-Ultraviolet Airglow During TwilightThe NASA Global-scale Observations of the Limb and Disk (GOLD) ultraviolet imaging spectrograph performs observations of upper-atmosphere airglow from the sunlit disk and limb of the Earth, in order…Stanley C. Solomon1, Laila Andersson, Alan G. Burns et al.·Nov 29, 2019SaveLearn
Angular Scattering in Charge Exchange: Issues and Implications for Secondary Interstellar HydrogenInterstellar neutral atoms provide a remote diagnostic of plasma in the outer heliosheath and the very local interstellar medium via charge exchange collisions that convert ions into atoms and vice…P. Swaczyna, D. J. McComas, E. J. Zirnstein et al.·Nov 22, 2019SaveLearn
Toward quantitative model for simulation and forecast of solar energetic particle production during gradual events -- II: kinetic description of SEPSolar Energetic Particles (SEPs) possess a high destructive potential as they pose multiple radiation hazards on Earth and onboard spacecrafts. The present work continues a series started with the…D. Borovikov, I. V. Sokolov, Z. Huang et al.·Nov 22, 2019SaveLearn
Radiation Monitor RADMON aboard Aalto-1 CubeSat: First resultsThe Radiation Monitor (RADMON) on-board Aalto-1 CubeSat is an energetic particle detector that fulfills the requirements of small size, low power consumption and low budget. Aalto-1 was launched on…Jan Gieseler, Philipp Oleynik, Heli Hietala et al.·Nov 18, 2019SaveLearn
Expansion of Solar Coronal Hot Electrons in an Inhomogeneous Magnetic Field: 1-D PIC SimulationThe expansion of hot electrons in flaring magnetic loops is crucial to understanding the dynamics of solar flares. In this paper we investigate, for the first time, the transport of hot electrons in…Jicheng Sun, Xinliang Gao, Yangguang Ke et al.·Nov 17, 2019SaveLearn
Comparison of counterstreaming suprathermal electron signatures of ICMEs with and without magnetic cloud: are all ICMEs flux ropes?Magnetic clouds (MCs), as large-scale interplanetary magnetic flux ropes, are usually still connected to the sun at both ends near 1 AU. Many researchers believe that all non-MC interplanetary…Jiemin Wang, Yan Zhao, Hengqiang Feng et al.·Nov 15, 2019SaveLearn
Propagation of Solar Energetic Particles in the Outer Heliosphere: Interplay between Scattering and Adiabatic FocusingThe turbulence and spatial nonuniformity of the guide magnetic field cause two competitive effects, namely, the scattering effect and the adiabatic focusing effect, respectively. In this work, we…H. -Q. He, W. Wan·Nov 7, 2019SaveLearn
Electric sails are potentially more effective than light sails near most starsElectric sails are propulsion systems that generate momentum via the deflection of stellar wind particles through electric forces. Here, we investigate the relative merits of electric sails and light…Manasvi Lingam, Abraham Loeb·Nov 7, 2019SaveLearn
Forecasting Megaelectron-Volt Electrons inside Earth's Outer Radiation Belt: PreMevE 2.0 Based on Supervised Machine Learning AlgorithmsHere we present the recent progress in upgrading a predictive model for Megaelectron-Volt (MeV) electrons inside the Earth's outer Van Allen belt. This updated model, called PreMevE 2.0, is…Rafael Pires de Lima, Yue Chen, Youzuo Lin·Nov 4, 2019SaveLearn
Effects of the Great American Solar Eclipse on the lower ionosphere observed with VLF wavesThe altitude of the ionospheric lower layer (D-region) is highly influenced by the solar UV flux affecting in turn, the propagation of Very Low Frequency (VLF) signals inside the waveguide formed…Rok Vogrinčič, Alejandro Lara, Andrea Borgazzi et al.·Oct 30, 2019SaveLearn
Gyro-Control of a Solar Sailing SatelliteRecent successes in the deployment of sails in space have reduced the risk associated with solar sailing missions. The attitude control requirements for a solar sailing mission is low with only slow…Hendrik Willem Jordaan, Willem Herman Steyn·Oct 29, 2019SaveLearn
The Structure of Planetary Period Oscillations in Saturn's Equatorial Magnetosphere: Results from the Cassini MissionSaturn's magnetospheric magnetic field, planetary radio emissions, plasma populations and magnetospheric structure are all known to be modulated at periods close to the assumed rotation period of the…D. J. Andrews, S. W. H. Cowley, G. Provan et al.·Oct 28, 2019SaveLearn
The Impact of Turbulent Solar Wind Fluctuations on Solar Orbiter Plasma Proton MeasurementsSolar Orbiter will observe the Sun and the inner heliosphere to study the connections between solar activity, coronal structure, and the origin of the solar wind. The plasma instruments on board…Georgios Nicolaou, Daniel Verscharen, Robert T. Wicks et al.·Oct 25, 2019SaveLearn
Fiber lasers: a power-scalable coherent light source for applications in spaceFiber lasers entered numerous applications due to their high efficiency and superior stability. Particularly in space, those lasers have to fulfill additional requirements set by the harsh…Oliver de Vries, Marco Plötner, Thomas Schreiber et al.·Oct 25, 2019SaveLearn
Perpendicular Ion Heating by Cyclotron Resonant Dissipation of Turbulently Generated Kinetic Alfv\'en Waves in the Solar WindSolar wind ions are observed to be heated in the directions perpendicular to the large-scale magnetic field, with preferential heating given to heavy ions. In the solar corona, this heating may be…Philip A. Isenberg, Bernard J. Vasquez·Oct 24, 2019SaveLearn