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Found 272 entries in the Bibliography.
Showing entries from 251 through 272
| 2016 |
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MEASURING COLLISIONLESS DAMPING IN HELIOSPHERIC PLASMAS USING FIELD\textendashPARTICLE CORRELATIONS An innovative field-particle correlation technique is proposed that uses single-point measurements of the electromagnetic fields and particle velocity distribution functions to investigate the net transfer of energy from fields to particles associated with the collisionless damping of turbulent fluctuations in weakly collisional plasmas, such as the solar wind. In addition to providing a direct estimate of the local rate of energy transfer between fields and particles, it provides vital new information about the distribut ... Published by: The Astrophysical Journal Published on: 08/2016 YEAR: 2016 DOI: 10.3847/2041-8205/826/2/L30 Astrophysics - Solar and Stellar Astrophysics; parker solar probe; Physics - Plasma Physics; Physics - Space Physics; plasmas; Solar Probe Plus; Solar wind; turbulence; waves |
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An Analysis of Interplanetary Solar Radio Emissions Associated with a Coronal Mass Ejection Krupar, V.; Eastwood, J.~P.; Kruparova, O.; Santolik, O.; Soucek, J.; c, Magdaleni\; Vourlidas, A.; Maksimovic, M.; Bonnin, X.; Bothmer, V.; Mrotzek, N.; Pluta, A.; Barnes, D.; Davies, J.~A.; Oliveros, J.~C.; Bale, S.~D.; Published by: \apjl Published on: 06/2016 YEAR: 2016 DOI: 10.3847/2041-8205/823/1/L5 Parker Data Used; solar─terrestrial relations; Sun: coronal mass ejections: CMEs; Sun: radio radiation; Astrophysics - Solar and Stellar Astrophysics |
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EVOLUTION OF THE PROTON VELOCITY DISTRIBUTION DUE TO STOCHASTIC HEATING IN THE NEAR-SUN SOLAR WIND We investigate how the proton distribution function evolves when the protons undergo stochastic heating by strong, low-frequency, Alfv\ en-wave turbulence under the assumption that β is small. We apply our analysis to protons undergoing stochastic heating in the supersonic fast solar wind and obtain proton distributions at heliocentric distances ranging from 4 to 30 solar radii. We find that the proton distribution develops non-Gaussian structure with a flat core and steep tail. For r\gt 5 RS, the proton distr ... Klein, Kristopher; Chandran, Benjamin; Published by: The Astrophysical Journal Published on: 03/2016 YEAR: 2016 DOI: 10.3847/0004-637X/820/1/47 Astrophysics - Solar and Stellar Astrophysics; parker solar probe; Physics - Plasma Physics; plasmas; Solar Probe Plus; Solar wind; turbulence; waves |
| 2015 |
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North-south asymmetry in the magnetic deflection of polar coronal hole jets o, Nistic\; Zimbardo, G.; Patsourakos, S.; Bothmer, V.; Nakariakov, V.~M.; Published by: \aap Published on: 11/2015 YEAR: 2015 DOI: 10.1051/0004-6361/201525731 Parker Data Used; Sun: corona; Sun: magnetic fields; methods: observational; Astrophysics - Solar and Stellar Astrophysics |
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Knowledge of the electron density distribution in the solar corona put constraints on the magnetic field configurations for coronal modeling and on initial conditions for solar wind modeling. We work with polarized SOHO/LASCO-C2 images from the last two recent minima of solar activity (1996-1997 and 2008-2010), devoid of coronal mass ejections. The goals are to derive the 4D electron density distributions in the corona by applying a newly developed time-dependent tomographic reconstruction method and to compare the result ... de Patoul, Judith; Foullon, Claire; Riley, Pete; Published by: The Astrophysical Journal Published on: 11/2015 YEAR: 2015 DOI: 10.1088/0004-637X/814/1/68 Astrophysics - Solar and Stellar Astrophysics; parker solar probe; Solar Probe Plus; Solar wind; Sun: corona; Sun: evolution; Sun: fundamental parameters; Sun: rotation |
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Intermittency and Alignment in Strong RMHD Turbulence Chandran, B.~D.~G.; Schekochihin, A.~A.; Mallet, A.; Published by: \apj Published on: 07/2015 YEAR: 2015 DOI: 10.1088/0004-637X/807/1/39 Parker Data Used; magnetohydrodynamics: MHD; plasmas; Solar wind; Sun: chromosphere; Sun: corona; turbulence; Astrophysics - Solar and Stellar Astrophysics; Physics - Space Physics |
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Resistive Magnetohydrodynamics Simulations of the Ideal Tearing Mode Landi, S.; Del Zanna, L.; Papini, E.; Pucci, F.; Velli, M.; Published by: \apj Published on: 06/2015 YEAR: 2015 DOI: 10.1088/0004-637X/806/1/131 Parker Data Used; magnetohydrodynamics: MHD; magnetic reconnection; methods: numerical; plasmas; Sun: magnetic fields; Astrophysics - Solar and Stellar Astrophysics |
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Localized enhancements of energetic particles at oblique collisionless shocks Fraschetti, F.; Giacalone, J.; Published by: \mnras Published on: 04/2015 YEAR: 2015 DOI: 10.1093/mnras/stv247 Parker Data Used; turbulence; cosmic rays; ISM: magnetic fields; Astrophysics - High Energy Astrophysical Phenomena; Astrophysics - Solar and Stellar Astrophysics; Physics - Plasma Physics; Physics - Space Physics |
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A MODIFIED VERSION OF TAYLOR\textquoterightS HYPOTHESIS FOR SOLAR PROBE PLUS OBSERVATIONS The Solar Probe Plus (SPP) spacecraft will explore the near-Sun environment, reaching heliocentric distances less than 10 R☉ . Near Earth, spacecraft measurements of fluctuating velocities and magnetic fields taken in the time domain are translated into information about the spatial structure of the solar wind via Taylor\textquoterights \textquotedblleftfrozen turbulence\textquotedblright hypothesis. Near the perihelion of SPP, however, the solar-wind speed is comparable to the Alfv\ en speed, and Taylor\text ... Klein, Kristopher; Perez, Jean; Verscharen, Daniel; Mallet, Alfred; Chandran, Benjamin; Published by: The Astrophysical Journal Published on: 03/2015 YEAR: 2015 DOI: 10.1088/2041-8205/801/1/L18 Astrophysics - Solar and Stellar Astrophysics; Parker Data Used; parker solar probe; Physics - Plasma Physics; Physics - Space Physics; plasmas; Solar Probe Plus; Solar wind; Sun: corona; turbulence |
| 2014 |
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Lionello, Roberto; Velli, Marco; Downs, Cooper; Linker, Jon; c, Zoran; Published by: \apj Published on: 12/2014 YEAR: 2014 DOI: 10.1088/0004-637X/796/2/111 Parker Data Used; magnetohydrodynamics: MHD; Solar wind; turbulence; waves; Astrophysics - Solar and Stellar Astrophysics |
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DYNAMICS OF DOUBLE LAYERS, ION ACCELERATION, AND HEAT FLUX SUPPRESSION DURING SOLAR FLARES Observations of flare-heated electrons in the corona typically suggest confinement of electrons. The confinement mechanism, however, remains unclear. The transport of coronal hot electrons into ambient plasma was recently investigated by particle-in-cell (PIC) simulations. Electron transport was significantly suppressed by the formation of a highly localized, nonlinear electrostatic potential in the form of a double layer (DL). In this work large-scale PIC simulations are performed to explore the dynamics of DLs in larger ... Li, T.; Drake, J.; Swisdak, M.; Published by: The Astrophysical Journal Published on: 09/2014 YEAR: 2014 DOI: 10.1088/0004-637X/793/1/7 acceleration of particles; Astrophysics - Solar and Stellar Astrophysics; parker solar probe; Physics - Plasma Physics; Physics - Space Physics; Solar Probe Plus; Solar wind; Sun: corona; Sun: flares |
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THE VIOLATION OF THE TAYLOR HYPOTHESIS IN MEASUREMENTS OF SOLAR WIND TURBULENCE Motivated by the upcoming Solar Orbiter and Solar Probe Plus missions, qualitative and quantitative predictions are made for the effects of the violation of the Taylor hypothesis on the magnetic energy frequency spectrum measured in the near-Sun environment. The synthetic spacecraft data method is used to predict observational signatures of the violation for critically balanced Alfv\ enic turbulence or parallel fast/whistler turbulence. The violation of the Taylor hypothesis can occur in the slow flow regime, leading to a ... Klein, K.; Howes, G.; TenBarge, J.; Published by: The Astrophysical Journal Published on: 08/2014 YEAR: 2014 DOI: 10.1088/2041-8205/790/2/L20 Astrophysics - Solar and Stellar Astrophysics; parker solar probe; Physics - Plasma Physics; Physics - Space Physics; plasmas; Solar Probe Plus; Solar wind; turbulence; waves |
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VALIDITY OF THE TAYLOR HYPOTHESIS FOR LINEAR KINETIC WAVES IN THE WEAKLY COLLISIONAL SOLAR WIND The interpretation of single-point spacecraft measurements of solar wind turbulence is complicated by the fact that the measurements are made in a frame of reference in relative motion with respect to the turbulent plasma. The Taylor hypothesis\textemdashthat temporal fluctuations measured by a stationary probe in a rapidly flowing fluid are dominated by the advection of spatial structures in the fluid rest frame\textemdashis often assumed to simplify the analysis. But measurements of turbulence in upcoming missions, such ... Howes, G.; Klein, K.; TenBarge, J.; Published by: The Astrophysical Journal Published on: 07/2014 YEAR: 2014 DOI: 10.1088/0004-637X/789/2/106 Astrophysics - Solar and Stellar Astrophysics; parker solar probe; Physics - Plasma Physics; Solar Probe Plus; Solar wind; turbulence |
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INBOUND WAVES IN THE SOLAR CORONA: A DIRECT INDICATOR OF ALFV\ EN SURFACE LOCATION The tenuous supersonic solar wind that streams from the top of the corona passes through a natural boundary\textemdashthe Alfv\ en surface\textemdashthat marks the causal disconnection of individual packets of plasma and magnetic flux from the Sun itself. The Alfv\ en surface is the locus where the radial motion of the accelerating solar wind passes the radial Alfv\ en speed, and therefore any displacement of material cannot carry information back down into the corona. It is thus the natural outer boundary of the solar co ... Deforest, C.; Howard, T.; McComas, D.; Published by: The Astrophysical Journal Published on: 06/2014 YEAR: 2014 DOI: 10.1088/0004-637X/787/2/124 Astrophysics - Solar and Stellar Astrophysics; parker solar probe; Solar Probe Plus; Solar wind; Sun: corona; Sun: fundamental parameters; techniques: image processing |
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Validating a Time-dependent Turbulence-driven Model of the Solar Wind Lionello, Roberto; Velli, Marco; Downs, Cooper; Linker, Jon; c, Zoran; Verdini, Andrea; Published by: \apj Published on: 04/2014 YEAR: 2014 DOI: 10.1088/0004-637X/784/2/120 Parker Data Used; magnetohydrodynamics: MHD; Solar wind; turbulence; waves; Astrophysics - Solar and Stellar Astrophysics |
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Test-particle Acceleration in a Hierarchical Three-dimensional Turbulence Model Dalena, S.; Rappazzo, A.~F.; Dmitruk, P.; Greco, A.; Matthaeus, W.~H.; Published by: \apj Published on: 03/2014 YEAR: 2014 DOI: 10.1088/0004-637X/783/2/143 Parker Data Used; acceleration of particles; magnetic reconnection; Sun: corona; turbulence; Astrophysics - Solar and Stellar Astrophysics; Physics - Space Physics |
| 2013 |
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Stochastic Heating, Differential Flow, and the Alpha-to-proton Temperature Ratio in the Solar Wind Chandran, B.~D.~G.; Verscharen, D.; Quataert, E.; Kasper, J.~C.; Isenberg, P.~A.; Bourouaine, S.; Published by: \apj Published on: 10/2013 YEAR: 2013 DOI: 10.1088/0004-637X/776/1/45 Parker Data Used; plasmas; Solar wind; Sun: corona; turbulence; waves; Astrophysics - Solar and Stellar Astrophysics; Physics - Plasma Physics; Physics - Space Physics |
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Current Sheets Formation in Tangled Coronal Magnetic Fields Rappazzo, A.~F.; Parker, E.~N.; Published by: \apjl Published on: 08/2013 YEAR: 2013 DOI: 10.1088/2041-8205/773/1/L2 Parker Data Used; magnetohydrodynamics: MHD; Sun: corona; Sun: magnetic topology; Astrophysics - Solar and Stellar Astrophysics |
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Rappazzo, A.~F.; Velli, M.; Einaudi, G.; Published by: \apj Published on: 07/2013 YEAR: 2013 DOI: 10.1088/0004-637X/771/2/76 Parker Data Used; magnetohydrodynamics: MHD; Sun: corona; Sun: coronal mass ejections: CMEs; Sun: magnetic topology; turbulence; Astrophysics - Solar and Stellar Astrophysics |
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Evolution of the Solar Flare Energetic Electrons in the Inhomogeneous Inner Heliosphere Solar flare accelerated electrons escaping into the interplanetary space and seen as type III solar radio bursts are often detected near the Earth. Using numerical simulations we consider the evolution of energetic electron spectrum in the inner heliosphere and near the Earth. The role of Langmuir wave generation, heliospheric plasma density fluctuations, and expansion of magnetic field lines on the electron peak flux and fluence spectra is studied to predict the electron properties as could be observed by Solar Orbiter a ... Published by: Solar Physics Published on: 07/2013 YEAR: 2013 DOI: 10.1007/s11207-012-0013-x Astrophysics - Solar and Stellar Astrophysics; dynamics; Energetic particles; flares; parker solar probe; plasma; propagation; Radio bursts; Solar Probe Plus; Solar wind; type III; waves |
| 2012 |
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Interchange Reconnection in a Turbulent Corona Rappazzo, A.~F.; Matthaeus, W.~H.; Ruffolo, D.; Servidio, S.; Velli, M.; Published by: \apjl Published on: 10/2012 YEAR: 2012 DOI: 10.1088/2041-8205/758/1/L14 Parker Data Used; magnetic reconnection; magnetohydrodynamics: MHD; Solar wind; Sun: corona; Sun: magnetic topology; turbulence; Astrophysics - Solar and Stellar Astrophysics; Physics - Space Physics |
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Intermittency and Local Heating in the Solar Wind Osman, K.~T.; Matthaeus, W.~H.; Wan, M.; Rappazzo, A.~F.; Published by: \prl Published on: 06/2012 YEAR: 2012 DOI: 10.1103/PhysRevLett.108.261102 Parker Data Used; 96.50.Ci; 52.50.-b; 94.05.Lk; 95.30.Qd; Solar wind plasma; sources of solar wind; Plasma production and heating; turbulence; Magnetohydrodynamics and plasmas; Physics - Space Physics; Astrophysics - Solar and Stellar Astrophysics; Physics - Plasma Physics |
