The local dayside reconnection rate for oblique interplanetary magnetic fieldsWe present an analysis of local properties of magnetic reconnection at the dayside magnetopause for various interplanetary magnetic field (IMF) orientations in global magnetospheric simulations. This…Colin M. Komar, Paul A. Cassak·Apr 28, 2016SaveLearn
The Effects of Turbulence on Three-Dimensional Magnetic Reconnection at the MagnetopauseTwo- and three-dimensional particle-in-cell simulations of a recent encounter of the Magnetospheric Multiscale Mission (MMS) with an electron diffusion region at the magnetopause are presented. While…L. Price, M. Swisdak, J. F. Drake et al.·Apr 27, 2016SaveLearn
One year in the Earth's magnetosphere: A global MHD simulation and spacecraft measurementsThe response of the Earth's magnetosphere to changing solar wind conditions are studied with a 3D Magnetohydrodynamic (MHD) model. One full year (155 Cluster orbits) of the Earth's…G. Facsko, I. Honkonen, T. Zivkovic et al.·Apr 27, 2016SaveLearn
The cosmic-ray ground-level enhancements of 29 September 1989 and 20 January 2005Enhancements of the comic-ray intensity as observed by detectors on the ground have been observed 71 times since 1942. They are due to solar energetic particles accelerated in the regions of solar…H. Moraal, R. A. Caballero-Lopez, K. G. McCracken·Apr 26, 2016SaveLearn
The pulse shape of cosmic-ray ground-level enhancementsEnhancements of the comic-ray intensity as observed by detectors on the ground have been observed 71 times since 1942. They are due to solar energetic particles accelerated in the regions of solar…H. Moraal, K. G. McCracken, R. A. Caballero-Lopez·Apr 26, 2016SaveLearn
Plasma compression in magnetic reconnection regions in the solar coronaIt has been proposed that particles bouncing between magnetized flows converging in a reconnection region can be accelerated by the first order Fermi mechanism. Analytical considerations of this…Elena Provornikova, John Martin Laming, Vyacheslav S. Lukin·Apr 25, 2016SaveLearn
Fitting the Low Energy Spectra of Cosmic Ray Primary Nuclei from C to Fe as Measured on Voyager 1The intensities of the low energy part of the spectra of primary cosmic ray nuclei including C, O, Ne, Mg, Si and Fe measured by Voyager 1 beyond the heliopause are deficient relative to the spectra…W. R. Webber·Apr 21, 2016SaveLearn
A new angle for probing field-aligned irregularities with the Murchison Widefield ArrayElectron density irregularities in the ionosphere are known to be magnetically anisotropic, preferentially elongated along the lines of force. While many studies of their morphology have been…Shyeh Tjing Loi, Tara Murphy, Iver H. Cairns et al.·Apr 20, 2016SaveLearn
Two-dimensional Hybrid Simulations of Kinetic Plasma Turbulence: Current and Vorticity vs Proton TemperatureProton temperature anisotropies between the directions parallel and perpendicular to the mean magnetic field are usually observed in the solar wind plasma. Here, we employ a high-resolution hybrid…Luca Franci, Petr Hellinger, Lorenzo Matteini et al.·Apr 4, 2016SaveLearn
Large Scale Earth's Bow Shock with Northern IMF as simulated by PIC code in parallel with MHD modelIn this paper, we propose a 3D kinetic model (Particle-in-Cell PIC ) for the description of the large scale Earth's bow shock. The proposed version is stable and does not require huge or…Suleiman M Baraka·Apr 1, 2016SaveLearn
Ionospheric current system accompanied by auroral vortex streetsHigh resolution optical measurements have revealed that a sudden brightening of aurora and its deformation from an arc-like to a vortex street structure appear just at the onset of substorm. The…Yasutaka Hiraki·Mar 30, 2016SaveLearn
Analysis of the ground level enhancements on 14 July 2000 and on 13 December 2006 using neutron monitor dataOn the basis of neutron monitor data we estimate the energy spectrum, anisotropy axis direction and pitch-angle distribution of solar energetic particles during two major ground level enhancements…Alexander Mishev, Ilya Usoskin·Mar 29, 2016SaveLearn
Self-consistent Monte Carlo simulations of proton acceleration in coronal shocks: Effect of anisotropic pitch-angle scattering of particlesContext. Solar energetic particles observed in association with coronal mass ejections (CMEs) are produced by the CME-driven shock waves. The acceleration of particles is considered to be due to…Alexandr Afanasiev, Markus Battarbee, Rami Vainio·Mar 29, 2016SaveLearn
Multiple current sheet systems in the outer heliosphere: Energy release and turbulenceIn the outer heliosphere, beyond the solar wind termination shock, it is expected that the warped heliospheric current sheet forms a region of closely-packed, multiple, thin current sheets. Such a…David Burgess, P. W. Gingell, Lorenzo Matteini·Mar 22, 2016SaveLearn
Voyager observations in the distant heliosheath: An analogy with ISEE-3 observations in the deep geomagnetic tailWe suggest an analogy between energetic particle and magnetic field observations made by the Voyager 1 spacecraft in the distant heliosheath at 122 AU in August 2012, and those made in the distant…Ian G. Richardson·Mar 19, 2016SaveLearn
Threshold of auroral intensification reduced by electron precipitation effectIt has been known that discrete aurora suddenly intensifies and deforms from an arc-like to a variety of wavy/vortex structures, especially during a substorm period. The instability of…Yasutaka Hiraki·Mar 18, 2016SaveLearn
Plasma observations during the Mars atmospheric "plume" event of March-April 2012We present initial analysis and conclusions from plasma observations made during the reported "Mars plume event" of March - April 2012. During this period, multiple independent amateur…D. J. Andrews, S. Barabash, N. J. T. Edberg et al.·Mar 18, 2016SaveLearn
Ion Dynamics at A Rippled Quasi-parallel Shock: 2-D Hybrid SimulationsIn this paper, two-dimensional (2-D) hybrid simulations are performed to investigate ion dynamics at a rippled quasi-parallel shock. The results show that the ripples around the shock front are…Yufei Hao, Quanming Lu, Xinliang Gao et al.·Mar 6, 2016SaveLearn
Annual Cosmic Ray Spectra from 250 MeV up to 1.6 GeV from 1995 - 2014 Measured With the Electron Proton Helium Instrument onboard SOHOThe solar modulation of galactic cosmic rays (GCR) can be studied in detail by examining long-term variations of the GCR energy spectrum (e.g. on the scales of a solar cycle). With almost 20 years of…P. Kühl, R. Gómez-Herrero, B. Heber·Mar 2, 2016SaveLearn
Dynamics of large-scale solar-wind streams obtained by the double superposed epoch analysis. 2. CIR.vs.Sheath and MC.vs.Ejecta comparisonsThis work is a continuation of our previous paper [Yermolaevetal2015] which describes the average temporal profiles of interplanetary plasma and field parameters in large-scale solar-wind (SW)…Yu. I. Yermolaev, I. G. Lodkina, N. S. Nikolaeva et al.·Feb 29, 2016SaveLearn
Solar wind magnetic turbulence: Inferences from spectral shapeSome differences between theoretical, numerical and observational determinations of spectral slopes of solar wind turbulence are interpreted in the thermodynamical sense. Confirmations of turbulent…R. A. Treumann, W. Baumjohann, Y. Narita·Feb 27, 2016SaveLearn
The Electron Temperature and Anisotropy in the Solar Wind. I. Comparison of the Core and Halo PopulationsEstimating the temperature of the solar wind particles and their anisotropies is particularly important for understanding the origin of these deviations from thermal equilibrium as well as their…V. Pierrard, M. Lazar, S. Poedts et al.·Feb 26, 2016SaveLearn
In-situ evidence of electron energization in the electron diffusion region of magnetotail reconnectionMagnetic reconnection is an explosive energy-release process in laboratory, space and astrophysical plasmas. While magnetic fields can `break' and `reconnect' in a very small region called…Mitsuo Oka, Tai Phan, Marit Oieroset et al.·Feb 26, 2016SaveLearn
A stochastic model for non-relativistic particle accelerationA stochastic model is proposed for the acceleration of non-relativistic particles yielding to energy spectra with a shape of a Weibull s function. Such particle distribution is found…G. Pallocchia, M. Laurenza, G. Consolini·Feb 22, 2016SaveLearn
Characteristics of proton velocity distribution functions in the near-lunar wake from Chandrayaan-1/SWIM observationsDue to the high absorption of solar wind plasma on the lunar dayside, a large scale wake structure is formed downstream of the Moon. However, recent in-situ observations have revealed the presence of…M B Dhanya, Anil Bhardwaj, Yoshifumi Futaana et al.·Feb 20, 2016SaveLearn