Detection of lightning in Saturn's Northern HemisphereDuring Cassini flyby of Saturn at a radial distance 6.18Rs (Saturn Radius), a signal was detected from about 200 to 430 Hz that had the proper dispersion characteristics to be a whistler. The…Mohsen Hassanzadeh Moghimi·Jul 27, 2012SaveLearn
Electromagnetic waves and electron anisotropies downstream of supercritical interplanetary shocksWe present waveform observations of electromagnetic lower hybrid and whistler waves with fci << f < fce downstream of four supercritical interplanetary (IP) shocks using the Wind search coil…L. B. Wilson, A. Koval, A. Szabo et al.·Jul 26, 2012SaveLearn
Parametric decay of oblique Alfvén waves in two-dimensional hybrid simulationsCertain types of plasma waves are known to become parametrically unstable under specific plasma conditions, in which the pump wave will decay into several daughter waves with different wavenumbers…Daniel Verscharen, Eckart Marsch, Uwe Motschmann et al.·Jul 25, 2012SaveLearn
Shocklets, SLAMS, and field-aligned ion beams in the terrestrial foreshockWe present Wind spacecraft observations of ion distributions showing field-aligned beams (FABs) and large-amplitude magnetic fluctuations composed of a series of shocklets and short large-amplitude…L. B. Wilson, A. Koval, D. G. Sibeck et al.·Jul 23, 2012SaveLearn
Vlasov simulations of multi-ion plasma turbulence in the solar windHybrid Vlasov-Maxwell simulations are employed to investigate the role of kinetic effects in a two-dimensional turbulent multi-ion plasma, composed of protons, alpha particles and fluid electrons. In…Denise Perrone, Francesco Valentini, Sergio Servidio et al.·Jul 23, 2012SaveLearn
Neo-Newtonian cosmology: An intermediate step towards General RelativityCosmology is a field of physics in which the use of General Relativity theory is indispensable. However, a cosmology based on Newtonian gravity theory for gravity is possible in certain…J. C. Fabris, Hermano Velten·Jun 30, 2012SaveLearn
Using Synthetic Spacecraft Data to Interpret Compressible Fluctuations in Solar Wind TurbulenceKinetic plasma theory is used to generate synthetic spacecraft data to analyze and interpret the compressible fluctuations in the inertial range of solar wind turbulence. The kinetic counterparts of…K. G. Klein, G. G. Howes, J. M. TenBarge et al.·Jun 28, 2012SaveLearn
Time and frequency transfer with a microwave link in the ACES/PHARAO missionThe Atomic Clocks Ensemble in Space (ACES/PHARAO mission), which will be installed on board the International Space Station (ISS), uses a dedicated two-way Micro-Wave Link (MWL) in order to compare…P. Delva, F. Meynadier, P. Wolf et al.·Jun 27, 2012SaveLearn
Electron density distribution and solar plasma correction of radio signals using MGS, MEX and VEX spacecraft navigation data and its application to planetary ephemeridesThe Mars Global Surveyor (MGS), Mars Express (MEX), and Venus Express (VEX) experienced several superior solar conjunctions. These conjunctions cause severe degradations of radio signals when the…A. K. Verma, A. Fienga, J. Laskar et al.·Jun 25, 2012SaveLearn
Variations of solar electron and proton flux in magnetic cloud boundary layers and comparisons with those across the shocks and in the reconnection exhaustsThe Magnetic cloud boundary layer (BL) is a dynamic region formed by the interaction of the magnetic cloud (MC) and the ambient solar wind. In the present study, we comparatively investigate the…Y. Wang, F. S. Wei, X. S. Feng et al.·Jun 25, 2012SaveLearn
Energetic Electrons Associated with Magnetic Reconnection in the Magnetic Cloud Boundary LayerHere is reported in situ observation of energetic electrons (~100-500 keV) associated with magnetic reconnection in the solar wind by the ACE and Wind spacecraft. The properties of this magnetic…Y. Wang, F. S. Wei, X. S. Feng et al.·Jun 25, 2012SaveLearn
Models of dust around Europa and GanymedeWe use numerical models, supported by our laboratory data, to predict the dust densities of ejecta outflux at any altitude within the Hill spheres of Europa and Ganymede. The ejecta are created by…K. Miljkovic, J. K. Hillier, N. J. Mason et al.·Jun 13, 2012SaveLearn
Expansion of magnetic clouds in the outer heliosphereA large amount of magnetized plasma is frequently ejected from the Sun as coronal mass ejections (CMEs). Some of these ejections are detected in the solar wind as magnetic clouds (MCs) that have flux…Adriana Maria Gulisano, Pascal Demoulin, Sergio Dasso et al.·Jun 7, 2012SaveLearn
Global and local expansion of magnetic clouds in the inner heliosphereObservations of magnetic clouds (MCs) are consistent with the presence of flux ropes detected in the solar wind (SW) a few days after their expulsion from the Sun as coronal mass ejections (CMEs).…Adriana Maria Gulisano, Pascal Demoulin, Sergio Dasso et al.·Jun 6, 2012SaveLearn
Insights into the nature of northwest-to-southeast aligned ionospheric wavefronts from contemporaneous Very Large Array and ionosondes observationsThe results of contemporaneous summer nighttime observations of midlatitude medium scale traveling ionospheric disturbances (MSTIDs) with the Very Large Array (VLA) in New Mexico and nearby…J. F. Helmboldt·Jun 4, 2012SaveLearn
Total electron content disturbances prior to Great Tohoku March 11, 2011 and October 23, 2011 Turkey Van earthquakes and their physical interpretationThis paper discusses the GPS (Global Positioning System) observed TEC (Total Electron Content) variations prior to the M 9.0 Great Tohoku (Japan, Sendai) March 11, 2011 and M 7.1 Oct. 23, 2011 Turkey…O. V. Zolotov, A. A. Namgaladze, B. E. Prokhorov·May 28, 2012SaveLearn
Density Fluctuation Spectrum of Solar Wind Turbulence between Ion and Electron ScalesWe present a measurement of the spectral index of density fluctuations between ion and electron scales in solar wind turbulence using the EFI instrument on the ARTEMIS spacecraft. The mean spectral…C. H. K. Chen, C. S. Salem, J. W. Bonnell et al.·May 22, 2012SaveLearn
Contributions to the cross shock electric field at supercritical perpendicular shocks: Impact of the pickup ionsA particle-in-cell code is used to examine contributions of the pickup ions (PIs) and the solar wind ions (SWs) to the cross shock electric field at the supercritical, perpendicular shocks. The code…Zhongwei Yang, Desheng Han, Huigen Yang et al.·May 20, 2012SaveLearn
Non-Gaussian statistics, maxwellian derivation and stellar polytropesIn this letter we discuss the Non-gaussian statistics considering two aspects. In the first, we show that the Maxwell's first derivation of the stationary distribution function for a dilute gas…E. P. Bento, J. R. P. Silva, R. Silva·May 8, 2012SaveLearn
Very Large Array Observations of Disturbed Ion Flow from the Plasmasphere to the Nighttime IonosphereWe present the results of a multi-scale analysis of TEC fluctuations using a roughly five-hour observation of the bright radio source Virgo A with the Very Large Array (VLA) at 74 MHz in its B…Joseph Helmboldt, Huib Intema·May 7, 2012SaveLearn
Interpreting Magnetic Variance Anisotropy Measurements in the Solar WindThe magnetic variance anisotropy (Am) of the solar wind has been used widely as a method to identify the nature of solar wind turbulent fluctuations; however, a thorough discussion of…J. M. TenBarge, J. J. Podesta, K. G. Klein et al.·May 3, 2012SaveLearn
Puzzles of the interplanetary magnetic field in the inner heliosphereDeviations of the interplanetary magnetic field (IMF) from Parker's model are frequently observed in the heliosphere at different distances r from the Sun. Usually, it is supposed that the IMF…Olga Khabarova, Vladimir Obridko·Apr 30, 2012SaveLearn
Comment on "Head-on collision of electron acoustic solitary waves in a plasma with nonextensive hot electrons"In a recent paper "Head-on collision of electron acoustic solitary waves in a plasma with nonextensive hot electrons" [Astrophys. Space Sci. 338, 271-278 (2012)] Eslami, Mottaghizadeh and…Frank Verheest·Apr 6, 2012SaveLearn
The roles of charge exchange and dissociation in spreading Saturn's neutral cloudsNeutrals sourced directly from Enceladus's plumes are initially confined to a dense neutral torus in Enceladus's orbit around Saturn. This neutral torus is redistributed by charge exchange,…B. L. Fleshman, P. A. Delamere, F. Bagenal et al.·Apr 4, 2012SaveLearn
Magnetic moment non-conservation in magnetohydrodynamic turbulence modelsThe fundamental assumptions of the adiabatic theory do not apply in presence of sharp field gradients as well as in presence of well developed magnetohydrodynamic turbulence. For this reason in such…S. Dalena, A. Greco, A. F. Rappazzo et al.·Apr 3, 2012SaveLearn