A Comparison of Galactic Cosmic Ray Proton and Helium Nuclei Spectra From ~10 MeV/nuc to 1 TeV/nuc Using New Voyager and Higher Energy Magnetic Spectrometer Measurements - Are There Differences In the Source Spectra of The Two NucleiThis paper determines the relative source spectra of cosmic ray H and He nuclei using a Leaky Box model for galactic propagation and the observed spectra of these nuclei from ~10 MeV/nuc to ~1…W. R. Webber·May 24, 2018SaveLearn
Orientation and stability of asymmetric magnetic reconnection x-lineThe orientation and stability of the reconnection x-line in asymmetric geometry is studied using three-dimensional (3D) particle-in-cell simulations. We initiate reconnection at the center of a large…Yi-Hsin Liu, Michael Hesse, Tak Chu Li et al.·May 20, 2018SaveLearn
Why the Shock-ICME Complex Structure is Important: Learning From the Early 2017 September CMEsIn the early days of 2017 September, an exceptionally energetic solar active region AR12673 aroused great interest in the solar physics community. It produced four X class flares, more than 20 CMEs…Chenglong Shen, Mengjiao Xu, Yuming Wang et al.·May 14, 2018SaveLearn
Exploiting dynamical perturbations for the end-of-life disposal of spacecraft in LEOAs part of the dynamical analysis carried out within the Horizon 2020 ReDSHIFT project, this work analyzes the possible strategies to guide low altitude satellites towards an atmospheric reentry…Giulia Schettino, Elisa Maria Alessi, Alessandro Rossi et al.·May 10, 2018SaveLearn
A Stealth CME Bracketed between Slow and Fast Wind Producing Unexpected Geo-effectivenessWe investigate how a weak coronal mass ejection (CME) launched on 2016 October 8 without obvious signatures in the low corona produced a relatively intense geomagnetic storm. Remote sensing…Wen He, Ying D. Liu, Huidong Hu et al.·May 8, 2018SaveLearn
Radiation Analysis for Moon and Mars MissionsThis paper provides an overview of the radiation aspects of manned space flight to Moon and Mars. The expected ionizing radiation dose for an astronaut is assessed along the Apollo 11 flight path to…Andreas Märki·May 4, 2018SaveLearn
North-South asymmetric Kelvin-Helmholtz instability and induced reconnection at the Earth's magnetospheric flanksWe present a three-dimensional study of the plasma dynamics at the flank magnetopause of the Earth's magnetosphere during mainly northward interplanetary magnetic field (IMF) periods. Two-fluid…S. Fadanelli, M. Faganello, F. Califano et al.·May 3, 2018SaveLearn
Cold prominence materials detected within magnetic clouds during 1998-2007Coronal mass ejections (CMEs) are intense solar explosive eruptions, and they are frequently correlated with prominence eruptions. Previous observations show that about 70\% of CMEs are associated…Jiemin Wang, Hengqiang Feng, Guoqing Zhao·May 2, 2018SaveLearn
The mirror mode: A "superconducting'' space plasma analogueWe examine the physics of the magnetic mirror mode in its final state of saturation, the thermodynamic equilibrium, to demonstrate that the mirror mode is the analogue of a superconducting effect in…R. A. Treumann, W. Baumjohann·Apr 29, 2018SaveLearn
Periodic shearing motions in the Jovian magnetosphere causing a localized peak in the main auroral emission close to noonRecently, a transient localized brightness enhancement has been observed in Jupiter's main auroral emission close to noon by Palmaerts et al. (2014). We use results from three-dimensional global MHD…E. Chané, B. Palmaerts, A. Radioti·Apr 27, 2018SaveLearn
NHDS: The New Hampshire Dispersion Relation SolverNHDS is the New Hampshire Dispersion Relation Solver. This article describes the numerics of the solver and its capabilities. The code is available for download on https://github.com/danielver02/NHDS.Daniel Verscharen, Benjamin D. G. Chandran·Apr 26, 2018SaveLearn
Whistler wave propagation through the ionosphere of VenusWe investigate the attenuation of whistler waves generated by hypotetical venusian lightning occurring at the altitude of the cloud layer under different ionospheric conditions. We use the Stanford…F. J. Pérez-Invernón, N. G. Lehtinen, F. J. Gordillo-Vázquez et al.·Apr 24, 2018SaveLearn
Building the Space Elevator: Lessons from Biological DesignOne of the biggest perceived challenges in building megastructures, such as the space elevator, is the unavailability of materials with sufficient tensile strength. The presumed necessity of very…Dan M. Popescu, Sean X. Sun·Apr 17, 2018SaveLearn
A Majority of Solar Wind Intervals Support Ion-Driven InstabilitiesWe perform a statistical assessment of solar wind stability at 1 AU against ion sources of free energy using Nyquist's instability criterion. In contrast to typically employed threshold models which…K. G. Klein, B. A. Alterman, M. L. Stevens et al.·Apr 17, 2018SaveLearn
A Generalized Quasi-Neutral Fluid-Particle Hybrid Plasma Model and Its Application to Energetic-Particle-Magnetohydrodynamics Hybrid SimulationA generalized fluid-particle hybrid model for collisionless plasmas under the assumption of quasi-neutrality is presented. The system consists of fluid ions and electrons as well as arbitrary numbers…Takanobu Amano·Apr 10, 2018SaveLearn
Addressing some critical aspects of the BepiColombo MORE relativity experimentThe Mercury Orbiter radio Science Experiment (MORE) is one of the experiments on-board the ESA/JAXA BepiColombo mission to Mercury, to be launched in October 2018. Thanks to full on-board and…Giulia Schettino, Daniele Serra, Giacomo Tommei et al.·Apr 9, 2018SaveLearn
Non-resonant Alfv\'enic instability activated by high temperature of ion beams in compensated-current astrophysical plasmasContext: Compensated-current systems are established in response to hot ion beams in terrestrial foreshock regions, around supernova remnants, and in other space and astrophysical plasmas. Aims: We…Pavlo Malovichko, Yuriy Voitenko, Johan De Keyser·Apr 7, 2018SaveLearn
Fitting and Reconstruction of Thirteen Simple Coronal Mass EjectionsCoronal mass ejections (CMEs) are the main drivers of geomagnetic disturbances, but the effects of their interaction with Earth's magnetic field depend on their magnetic configuration and…Nada Al-Haddad, Teresa Nieves-Chinchilla, Neel P. Savani et al.·Apr 6, 2018SaveLearn
Verification of Space Weather Forecasts issued by the Met Office Space Weather Operations CentreThe Met Office Space Weather Operations Centre was founded in 2014 and part of its remit is a daily Space Weather Technical Forecast to help the UK build resilience to space weather impacts; guidance…Michael A. Sharpe, Sophie A. Murray·Apr 6, 2018SaveLearn
Arbitrary-order Hilbert spectral analysis and intermittency in solar wind density fluctuationsThe properties of inertial and kinetic range solar wind turbulence have been investigated with the arbitrary-order Hilbert spectral analysis method, applied to high-resolution density measurements.…Francesco Carbone, Luca Sorriso-Valvo, Tommaso Alberti et al.·Apr 6, 2018SaveLearn
Finite-Larmor-radius equilibrium and currents of the Earth's flank magnetopauseWe consider the one-dimensional equilibrium problem of a shear-flow boundary layer within an "extended Hall-MHD" (eHMHD) model of plasma that retains first-order finite Larmor radius (FLR)…S. S. Cerri·Apr 6, 2018SaveLearn
Electron mirror branch: Observational evidence from "historical" AMPTE-IRM and Equator-S measurementsBased on now historical magnetic and plasma data and available wave spectra from the AMPTE-IRM spacecraft, and on as well historical Equator-S high-cadence magnetic field observations of mirror modes…R. A. Treumann, W. Baumjohann·Apr 3, 2018SaveLearn
Sub-ionospheric AKR: A possible mechanism for its transport down from the topside generation region to the F layer and groundRecent theoretical work shows that "electron exhausts", elongated regions of depleted electron density shown by PIC codes to be generated in collisionless reconnection, can in principle become…R. A. Treumann, W. Baumjohann, J. LaBelle·Mar 29, 2018SaveLearn
Number density structures in the inner heliosphereThe origins and generation mechanisms of the slow solar wind are still unclear. Part of the slow solar wind is populated by "number density structures", discrete patches of increased number density…D. Stansby, T. S. Horbury·Mar 27, 2018SaveLearn
Dayside magnetospheric and ionospheric responses to a foreshock transient on June 25, 2008: 2. 2-D evolution based on dayside auroral imagingThe foreshock region involves localized and transient structures such as foreshock cavities and hot flow anomalies due to solar wind-bow shock interactions, and foreshock transients have been shown…Boyi Wang, Yukitoshi Nishimura, Heli Hietala et al.·Mar 27, 2018SaveLearn