PSP Bibliography





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Found 275 entries in the Bibliography.


Showing entries from 201 through 250


2018

Oscillations of cometary tails: a vortex shedding phenomenon?

o, Nistic\; Vladimirov, V.; Nakariakov, V.~M.; Battams, K.; Bothmer, V.;

Published by: \aap      Published on: 08/2018

YEAR: 2018     DOI: 10.1051/0004-6361/201732474

Parker Data Used; Solar wind; comets: individual: Encke; ISON; magnetohydrodynamics (MHD); methods: observational; instabilities; waves; Astrophysics - Earth and Planetary Astrophysics

Short, large-amplitude speed enhancements in the near-Sunfast solar wind

We report the presence of intermittent, short discrete enhancements in plasma speed in the near-Sun high-speed solar wind. Lasting tens of seconds to minutes in spacecraft measurements at 0.3 au, speeds inside these enhancements can reach 1000 km s-1, corresponding to a kinetic energy up to twice that of the bulk high-speed solar wind. These events, which occur around 5 per cent of the time, are Alfv\ enic in nature with large magnetic field deflections and are the same temperature as the surrounding plasma, in ...

Horbury, T; Matteini, L; Stansby, D;

Published by: Monthly Notices of the Royal Astronomical Society      Published on: 08/2018

YEAR: 2018     DOI: 10.1093/mnras/sty953

parker solar probe; Solar Probe Plus; Solar wind; Sun: corona

Weakened Magnetization and Onset of Large-scale Turbulence in the Young Solar Wind\textemdashComparisons of Remote Sensing Observations with Simulation

Chhiber, Rohit; Usmanov, Arcadi; DeForest, Craig; Matthaeus, William; Parashar, Tulasi; Goldstein, Melvyn;

Published by: \apjl      Published on: 04/2018

YEAR: 2018     DOI: 10.3847/2041-8213/aab843

Parker Data Used; magnetohydrodynamics: MHD; Solar wind; Sun: corona; turbulence

Radial evolution of the solar wind in pure high-speed streams: HELIOS revised observations

Spacecraft observations have shown that the proton temperature in the solar wind falls off with radial distance more slowly than expected for an adiabatic prediction. Usually, previous studies have been focused on the evolution of the solar-wind plasma by using the bulk speed as an order parameter to discriminate different regimes. In contrast, here, we study the radial evolution of pure and homogeneous fast streams (i.e. well-defined streams of coronal-hole plasma that maintain their identity during several solar rotatio ...

Perrone, Denise; Stansby, D; Horbury, T; Matteini, L;

Published by: Monthly Notices of the Royal Astronomical Society      Published on: 03/2019

YEAR: 2018     DOI: 10.1093/mnras/sty3348

parker solar probe; Physics - Plasma Physics; Physics - Space Physics; Solar Probe Plus; Solar wind; Sun: corona; Sun: heliosphere

Investigating the Effect of IMF Path Length on Pitch-angle Scattering of Strahl within 1 au

Strahl is the strongly field-aligned, beam-like population of electrons in the solar wind. Strahl width is observed to increase with distance from the Sun, and hence strahl electrons must be subject to in-transit scattering effects. Different energy relations have been both observed and modeled for both strahl width and the width increase with radial distance. Thus, there is much debate regarding what mechanism(s) scatter strahl. In this study, we use a novel method to investigate strahl evolution within 1 au by estimatin ...

Graham, G.; Rae, I.; Owen, C.; Walsh, A.;

Published by: The Astrophysical Journal      Published on: 03/2018

YEAR: 2018     DOI: 10.3847/1538-4357/aaaf1b

parker solar probe; plasmas; scattering; Solar Probe Plus; Solar wind; Sun: heliosphere

Solar-wind predictions for the Parker Solar Probe Orbit

Context. The Parker Solar Probe (PSP; formerly Solar Probe Plus) mission will be humanitys first in situ exploration of the solar corona with closest perihelia at 9.86 solar radii (R) distance to the Sun. It will help answer hitherto unresolved questions on the heating of the solar corona and the source and acceleration of the solar wind and solar energetic particles. The scope of this study is to model the solar-wind environment for PSPs unprecedented distances in its prime mission phase during the years 20 ...

Venzmer, M.; Bothmer, V.;

Published by: Astronomy \& Astrophysics      Published on: 03/2018

YEAR: 2018     DOI: 10.1051/0004-6361/201731831

Astrophysics - Solar and Stellar Astrophysics; Parker Data Used; parker solar probe; Physics - Space Physics; Solar Probe Plus; Solar wind; Sun: corona; Sun: heliosphere

Spectroscopic Measurements of the Ion Velocity Distribution at the Base of the Fast Solar Wind

In situ measurements of the fast solar wind reveal non-thermal distributions of electrons, protons, and minor ions extending from 0.3 au to the heliopause. The physical mechanisms responsible for these non-thermal properties and the location where these properties originate remain open questions. Here, we present spectroscopic evidence, from extreme ultraviolet spectroscopy, that the velocity distribution functions (VDFs) of minor ions are already non-Gaussian at the base of the fast solar wind in a coronal hole, at altit ...

Jeffrey, Natasha; Hahn, Michael; Savin, Daniel; Fletcher, Lyndsay;

Published by: The Astrophysical Journal      Published on: 03/2018

YEAR: 2018     DOI: 10.3847/2041-8213/aab08c

Astrophysics - Solar and Stellar Astrophysics; line: profiles; parker solar probe; Solar Probe Plus; Solar wind; Sun: corona; Sun: heliosphere; Sun: UV radiation; techniques: spectroscopic

Diagnosing solar wind origins using in situ measurements in the inner heliosphere

Robustly identifying the solar sources of individual packets of solar wind measured in interplanetary space remains an open problem. We set out to see if this problem is easier to tackle using solar wind measurements closer to the Sun than 1 au, where the mixing and dynamical interaction of different solar wind streams is reduced. Using measurements from the Helios mission, we examined how the proton core temperature anisotropy and cross-helicity varied with distance. At 0.3 au there are two clearly separated anisotropic ...

Stansby, D; Horbury, T; Matteini, L;

Published by: Monthly Notices of the Royal Astronomical Society      Published on: 01/2019

YEAR: 2018     DOI: 10.1093/mnras/sty2814

Astrophysics - Solar and Stellar Astrophysics; parker solar probe; Physics - Space Physics; Solar Probe Plus; Solar wind; Sun:; Sun: heliosphere

The Use of the Expanded FMEA in Spacecraft Fault Management

The NASA/APL Parker Solar Probe (PSP) mission will revolutionize our understanding of the Sun by swooping to within 4 million miles of the Sun s surface. This mission targets the fundamental processes and dynamics that characterize the Sun s corona and outwardly expanding solar wind and will be the first mission to fly into the low solar corona (i.e., the Sun s atmosphere) revealing both how the corona is heated and how the solar wind is accelerated. PSP has many engineering challenges presented by the intense environment in ...

Jones, Melissa; Fretz, Kristin; Kubota, Sanae; Smith, Clayton;

Published by: Proceedings - Annual Reliability and Maintainability Symposium      Published on:

YEAR: 2018     DOI:

Failure modes; Fault detection; Human resource management; Maintainability; NASA; Risk analysis; Risk assessment; Safety factor; Solar radiation; Solar wind; Spacecraft; Parker Engineering

2017

A Zone of Preferential Ion Heating Extends Tens of Solar Radii from the Sun

The extreme temperatures and nonthermal nature of the solar corona and solar wind arise from an unidentified physical mechanism that preferentially heats certain ion species relative to others. Spectroscopic indicators of unequal temperatures commence within a fraction of a solar radius above the surface of the Sun, but the outer reach of this mechanism has yet to be determined. Here we present an empirical procedure for combining interplanetary solar wind measurements and a modeled energy equation including Coulomb relax ...

Kasper, J.; Klein, K.; Weber, T.; Maksimovic, M.; Zaslavsky, A.; Bale, S.; Maruca, B.; Stevens, M.; Case, A.;

Published by: The Astrophysical Journal      Published on: 11/2017

YEAR: 2017     DOI: 10.3847/1538-4357/aa84b1

acceleration of particles; Astrophysics - Solar and Stellar Astrophysics; magnetic fields; parker solar probe; Physics - Plasma Physics; Physics - Space Physics; plasmas; Solar Probe Plus; Solar wind; Sun: corona; turbulence

Future space missions: the inner region of the Solar system

The paper deals with an overview of space missions to explore the inner region of the Solar System, the nearest on time of their launch, namely, Probe Plus, Solar Orbiter, BepiColombo, EXOMars, and InSight. Each of them will study either the Sun or the planet of the Earth group. Their launches are planned for 2018-2020. We describe briefly predestination and technical equipment of spacecrafts, flight plan and scientific goal of these missions.

Vasylenko, A.A.;

Published by: Kosm\ \i\v cna nauka \ \i tehnolog\ \i\^a      Published on: 10/2017

YEAR: 2017     DOI: 10.15407/knit10.15407/knit2017.0310.15407/knit2017.03.073

Martian atmosphere; Martian surface; Mercury magnetic field; Parker Data Used; parker solar probe; Solar Probe Plus; Solar wind

Quasi-thermal noise spectroscopy: The art and the practice

Quasi-thermal noise spectroscopy is an efficient tool for measuring in situ macroscopic plasma properties in space, using a passive wave receiver at the ports of an electric antenna. This technique was pioneered on spinning spacecraft carrying very long dipole antennas in the interplanetary medium\textemdashlike ISEE-3 and Ulysses\textemdashwhose geometry approached a "theoretician\textquoterights dream." The technique has been extended to other instruments in various types of plasmas on board different spacecraft and wil ...

Meyer-Vernet, N.; Issautier, K.; Moncuquet, M.;

Published by: Journal of Geophysical Research: Space Physics      Published on: 08/2017

YEAR: 2017     DOI: 10.1002/2017JA024449

electric antennas; magnetospheres; parker solar probe; plasma waves; radio receivers; Solar Probe Plus; Solar wind; velocity distributions

Coronal Heating Topology: The Interplay of Current Sheets and Magnetic Field Lines

Rappazzo, A.~F.; Matthaeus, W.~H.; Ruffolo, D.; Velli, M.; Servidio, S.;

Published by: \apj      Published on: 07/2017

YEAR: 2017     DOI: 10.3847/1538-4357/aa79f2

Parker Data Used; magnetohydrodynamics: MHD; Solar wind; Sun: activity; Sun: corona; Sun: magnetic fields; turbulence; Astrophysics - Solar and Stellar Astrophysics; Physics - Plasma Physics; Physics - Space Physics

Evolving Waves and Turbulence in the Outer Corona and Inner Heliosphere: The Accelerating Expanding Box

Tenerani, Anna; Velli, Marco;

Published by: \apj      Published on: 07/2017

YEAR: 2017     DOI: 10.3847/1538-4357/aa71b9

Parker Data Used; magnetohydrodynamics: MHD; methods: numerical; Solar wind; Sun: heliosphere; turbulence; waves; Astrophysics - Solar and Stellar Astrophysics; Physics - Plasma Physics; Physics - Space Physics

Cosmic-Ray Diffusion Coefficients throughout the Inner Heliosphere from a Global Solar Wind Simulation

Chhiber, R.; Subedi, P.; Usmanov, A.~V.; Matthaeus, W.~H.; Ruffolo, D.; Goldstein, M.~L.; Parashar, T.~N.;

Published by: \apjs      Published on: 06/2017

YEAR: 2017     DOI: 10.3847/1538-4365/aa74d2

Parker Data Used; cosmic rays; diffusion; methods: numerical; Solar wind; turbulence; Physics - Space Physics

Turbulent Transport in a Three-dimensional Solar Wind

Shiota, D.; Zank, G.~P.; Adhikari, L.; Hunana, P.; Telloni, D.; Bruno, R.;

Published by: \apj      Published on: 03/2017

YEAR: 2017     DOI: 10.3847/1538-4357/aa60bc

Parker Data Used; magnetohydrodynamics: MHD; Solar wind; turbulence

Langmuir wave electric fields induced by electron beams in the heliosphere

Solar electron beams responsible for type III radio emission generate Langmuir waves as they propagate out from the Sun. The Langmuir waves are observed via in situ electric field measurements. These Langmuir waves are not smoothly distributed but occur in discrete clumps, commonly attributed to the turbulent nature of the solar wind electron density. Exactly how the density turbulence modulates the Langmuir wave electric fields is understood only qualitatively. Using weak turbulence simulations, we investigate how solar ...

Reid, Hamish; Kontar, Eduard;

Published by: Astronomy \& Astrophysics      Published on: 02/2017

YEAR: 2017     DOI: 10.1051/0004-6361/201629697

Astrophysics - Solar and Stellar Astrophysics; parker solar probe; Physics - Plasma Physics; Physics - Space Physics; Solar Probe Plus; Solar wind; Sun: flares; Sun: heliosphere; Sun: magnetic fields; Sun: particle emission; Sun: radio radiation

Reconnection-Driven Coronal-Hole Jets with Gravity and Solar Wind

Karpen, J.~T.; DeVore, C.~R.; Antiochos, S.~K.; Pariat, E.;

Published by: \apj      Published on: 01/2017

YEAR: 2017     DOI: 10.3847/1538-4357/834/1/62

Parker Data Used; magnetic reconnection; magnetohydrodynamics: MHD; Solar wind; stars: jets; Sun: activity; Sun: corona; Astrophysics - Solar and Stellar Astrophysics

Revisiting a Classic: The Parker-Moffatt Problem

Pezzi, O.; Parashar, T.~N.; Servidio, S.; Valentini, F.; asconez, C.~L.; Yang, Y.; Malara, F.; Matthaeus, W.~H.; Veltri, P.;

Published by: \apj      Published on: 01/2017

YEAR: 2017     DOI: 10.3847/1538-4357/834/2/166

Parker Data Used; magnetohydrodynamics: MHD; plasmas; Solar wind; Physics - Space Physics

2016

The Solar Probe Plus Mission: Humanity\textquoterights First Visit to Our Star

Solar Probe Plus (SPP) will be the first spacecraft to fly into the low solar corona. SPP\textquoterights main science goal is to determine the structure and dynamics of the Sun\textquoterights coronal magnetic field, understand how the solar corona and wind are heated and accelerated, and determine what processes accelerate energetic particles. Understanding these fundamental phenomena has been a top-priority science goal for over five decades, dating back to the 1958 Simpson Committee Report. The scale and concept of su ...

Fox, N.; Velli, M.; Bale, S.; Decker, R.; Driesman, A.; Howard, R.; Kasper, J.; Kinnison, J.; Kusterer, M.; Lario, D.; Lockwood, M.; McComas, D.; Raouafi, N.; Szabo, A.;

Published by: Space Science Reviews      Published on: 12/2016

YEAR: 2016     DOI: 10.1007/s11214-015-0211-6

Corona; Heliophysics; NASA mission; Parker Data Used; parker solar probe; Solar Probe Plus; Solar wind; SPP

Simulations of Lateral Transport and Dropout Structure of Energetic Particles from Impulsive Solar Flares

Tooprakai, P.; Seripienlert, A.; Ruffolo, D.; Chuychai, P.; Matthaeus, W.~H.;

Published by: \apj      Published on: 11/2016

YEAR: 2016     DOI: 10.3847/0004-637X/831/2/195

Parker Data Used; magnetic fields; Solar wind; Sun: particle emission; turbulence

Propinquity of Current and Vortex Structures: Effects on Collisionless Plasma Heating

Parashar, Tulasi; Matthaeus, William;

Published by: \apj      Published on: 11/2016

YEAR: 2016     DOI: 10.3847/0004-637X/832/1/57

Parker Data Used; plasmas; Solar wind; Sun: heliosphere; turbulence; Physics - Space Physics; Astrophysics - Solar and Stellar Astrophysics; Physics - Plasma Physics

Slow Solar Wind: Observations and Modeling

While it is certain that the fast solar wind originates from coronal holes, where and how the slow solar wind (SSW) is formed remains an outstanding question in solar physics even in the post-SOHO era. The quest for the SSW origin forms a major objective for the planned future missions such as the Solar Orbiter and Solar Probe Plus. Nonetheless, results from spacecraft data, combined with theoretical modeling, have helped to investigate many aspects of the SSW. Fundamental physical properties of the coronal plasma have be ...

Abbo, L.; Ofman, L.; Antiochos, S.; Hansteen, V.; Harra, L.; Ko, Y.-K.; Lapenta, G.; Li, B.; Riley, P.; Strachan, L.; von Steiger, R.; Wang, Y.-M.;

Published by: Space Science Reviews      Published on: 11/2016

YEAR: 2016     DOI: 10.1007/s11214-016-0264-1

Corona; Coronal streamers; MHD and kinetic models; parker solar probe; Solar Probe Plus; Solar wind; Sun

Fading Coronal Structure and the Onset of Turbulence in the Young Solar Wind

DeForest, C.~E.; Matthaeus, W.~H.; Viall, N.~M.; Cranmer, S.~R.;

Published by: \apj      Published on: 09/2016

YEAR: 2016     DOI: 10.3847/0004-637X/828/2/66

Parker Data Used; Solar wind; Sun: corona; Sun: fundamental parameters; techniques: image processing; Astrophysics - Solar and Stellar Astrophysics

Turbulence and Proton-Electron Heating in Kinetic Plasma

Matthaeus, William; Parashar, Tulasi; Wan, Minping; Wu, P.;

Published by: \apjl      Published on: 08/2016

YEAR: 2016     DOI: 10.3847/2041-8205/827/1/L7

Parker Data Used; galaxies: ISM; ISM: kinematics and dynamics; plasmas; solar─terrestrial relations; Solar wind; turbulence

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 ...

Klein, K.; Howes, G.;

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

Inward Motions in the Outer Solar Corona between 7 and 12 R $_☉$: Evidence for Waves or Magnetic Reconnection Jets?

Tenerani, Anna; Velli, Marco; DeForest, Craig;

Published by: \apjl      Published on: 07/2016

YEAR: 2016     DOI: 10.3847/2041-8205/825/1/L3

Parker Data Used; magnetic reconnection; magnetohydrodynamics: MHD; Solar wind; Sun: corona; waves

Variance anisotropy in compressible 3-D MHD

Oughton, S.; Matthaeus, W.~H.; Wan, Minping; Parashar, Tulasi;

Published by: Journal of Geophysical Research (Space Physics)      Published on: 06/2016

YEAR: 2016     DOI: 10.1002/2016JA022496

Parker Data Used; Solar wind; turbulence

Variance Anisotropy in Kinetic Plasmas

Parashar, Tulasi; Oughton, Sean; Matthaeus, William; Wan, Minping;

Published by: \apj      Published on: 06/2016

YEAR: 2016     DOI: 10.3847/0004-637X/824/1/44

Parker Data Used; plasmas; Solar wind; turbulence; waves

The Digital Fields Board for the FIELDS instrument suite on the Solar Probe Plus mission: Analog and digital signal processing

The first in situ measurements of electric and magnetic fields in the near-Sun environment (\< 0.25 AU from the Sun) will be made by the FIELDS instrument suite on the Solar Probe Plus mission. The Digital Fields Board (DFB) is an electronics board within FIELDS that performs analog and digital signal processing, as well as digitization, for signals between DC and 60 kHz from five voltage sensors and four search coil magnetometer channels. These nine input signals are processed on the DFB into 26 analog data streams. A ...

Malaspina, David; Ergun, Robert; Bolton, Mary; Kien, Mark; Summers, David; Stevens, Ken; Yehle, Alan; Karlsson, Magnus; Hoxie, Vaughn; Bale, Stuart; Goetz, Keith;

Published by: Journal of Geophysical Research: Space Physics      Published on: 06/2016

YEAR: 2016     DOI: 10.1002/2016JA022344

electric and magnetic fields; instrumentation; Parker Data Used; parker solar probe; signal processing; solar probe; Solar Probe Plus; Solar wind

Local modulation and trapping of energetic particles by coherent magnetic structures

Tessein, Jeffrey; Ruffolo, David; Matthaeus, William; Wan, Minping;

Published by: \grl      Published on: 04/2016

YEAR: 2016     DOI: 10.1002/2016GL068045

Parker Data Used; Solar wind; turbulence; Energetic particles; intermittency; magnetic fields

SOLAR WIND COLLISIONAL AGE FROM A GLOBAL MAGNETOHYDRODYNAMICS SIMULATION

Simple estimates of the number of Coulomb collisions experienced by the interplanetary plasma to the point of observation, I.e., the \textquotedblleftcollisional age\textquotedblright, can be usefully employed in the study of non-thermal features of the solar wind. Usually these estimates are based on local plasma properties at the point of observation. Here we improve the method of estimation of the collisional age by employing solutions obtained from global three-dimensional magnetohydrodynamics simulations. This enable ...

Chhiber, R; Usmanov, AV; Matthaeus, WH; Goldstein, ML;

Published by: The Astrophysical Journal      Published on: 04/2016

YEAR: 2016     DOI: 10.3847/0004-637X/821/1/34

magnetohydrodynamics: MHD; methods: numerical; parker solar probe; plasmas; scattering; Solar Probe Plus; Solar wind; turbulence

A Four-fluid MHD Model of the Solar Wind/Interstellar Medium Interaction with Turbulence Transport and Pickup Protons as Separate Fluid

Usmanov, Arcadi; Goldstein, Melvyn; Matthaeus, William;

Published by: \apj      Published on: 03/2016

YEAR: 2016     DOI: 10.3847/0004-637X/820/1/17

Parker Data Used; ISM: magnetic fields; magnetohydrodynamics: MHD; methods: numerical; Solar wind; Sun: heliosphere; turbulence

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

The Wide-Field Imager for Solar Probe Plus (WISPR)

Vourlidas, Angelos; Howard, Russell; Plunkett, Simon; Korendyke, Clarence; Thernisien, Arnaud; Wang, Dennis; Rich, Nathan; Carter, Michael; Chua, Damien; Socker, Dennis; Linton, Mark; Morrill, Jeff; Lynch, Sean; Thurn, Adam; Van Duyne, Peter; Hagood, Robert; Clifford, Greg; Grey, Phares; Velli, Marco; Liewer, Paulett; Hall, Jeffrey; DeJong, Eric; Mikic, Zoran; Rochus, Pierre; Mazy, Emanuel; Bothmer, Volker; Rodmann, Jens;

Published by: Space Science Reviews      Published on: 02/2015

YEAR: 2016     DOI: 10.1007/s11214-014-0114-y

Heliospheric imager; Imaging; Parker Data Used; Solar corona; Solar Probe Plus; Solar wind; Thomson scattering

2015

3D ELECTRON DENSITY DISTRIBUTIONS IN THE SOLAR CORONA DURING SOLAR MINIMA: ASSESSMENT FOR MORE REALISTIC SOLAR WIND MODELING

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

Transition from Kinetic to MHD Behavior in a Collisionless Plasma

Parashar, Tulasi; Matthaeus, William; Shay, Michael; Wan, Minping;

Published by: \apj      Published on: 10/2015

YEAR: 2015     DOI: 10.1088/0004-637X/811/2/112

Parker Data Used; magnetohydrodynamics: MHD; plasmas; Solar wind; turbulence

ION-SCALE TURBULENCE IN THE INNER HELIOSPHERE: RADIAL DEPENDENCE

The evolution of the ion-scale plasma turbulence in the inner heliosphere is studied by associating the plasma parameters for hybrid-code turbulence simulations to the radial distance from the Sun via a Solar wind model based mapping procedure. Using a mapping based on a one-dimensional solar wind expansion model, the resulting ion-kinetic scale turbulence is related to the solar wind distance from the Sun. For this purpose the mapping is carried out for various values of ion beta that correspond to the heliocentric dista ...

Comişel, H.; Motschmann, U.; üchner, J.; Narita, Y.; Nariyuki, Y.;

Published by: The Astrophysical Journal      Published on: 10/2015

YEAR: 2015     DOI: 10.1088/0004-637X/812/2/175

parker solar probe; plasmas; Solar Probe Plus; Solar wind; turbulence; waves

Radial Variation of the Solar Wind Proton Temperature: Heat Flow or Addition?

Scudder, J.~D.;

Published by: \apj      Published on: 08/2015

YEAR: 2015     DOI: 10.1088/0004-637X/809/2/126

Parker Data Used; conduction; equation of state; hydrodynamics; plasmas; Solar wind; waves

KINETIC EVOLUTION OF CORONAL HOLE PROTONS BY IMBALANCED ION-CYCLOTRON WAVES: IMPLICATIONS FOR MEASUREMENTS BY SOLAR PROBE PLUS

We extend the kinetic guiding-center model of collisionless coronal hole protons presented in Isenberg \& Vasquez to consider driving by imbalanced spectra of obliquely propagating ion-cyclotron waves. These waves are assumed to be a small by-product of the imbalanced turbulent cascade to high perpendicular wavenumber, and their total intensity is taken to be 1\% of the total fluctuation energy. We also extend the kinetic solutions for the proton distribution function in the resulting fast solar wind to heliocentric d ...

Isenberg, Philip; Vasquez, Bernard;

Published by: The Astrophysical Journal      Published on: 08/2015

YEAR: 2015     DOI: 10.1088/0004-637X/808/2/119

parker solar probe; plasmas; Solar Probe Plus; Solar wind; Sun: corona; turbulence; waves

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

RADIAL EVOLUTION OF A MAGNETIC CLOUD: MESSENGER , STEREO , AND VENUS EXPRESS OBSERVATIONS

The Solar Orbiter and Solar Probe Plus missions will provide observations of magnetic clouds closer to the Sun than ever before, and it will be good preparation for these missions to make full use of the most recent in situ data sets from the inner heliosphere\textemdashnamely, those provided by MErcury Surface, Space ENvironment, GEochemistry, and Ranging (MESSENGER) and Venus Express\textemdashfor magnetic cloud studies. We present observations of the same magnetic cloud made by MESSENGER at Mercury and later by Solar T ...

Good, S.; Forsyth, R.; Raines, J.; Gershman, D.; Slavin, J.; Zurbuchen, T.;

Published by: The Astrophysical Journal      Published on: 07/2015

YEAR: 2015     DOI: 10.1088/0004-637X/807/2/177

magnetic fields; parker solar probe; Solar Probe Plus; Solar wind; Sun: coronal mass ejections: CMEs; Sun: heliosphere

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

Statistical study of magnetic cloud erosion by magnetic reconnection

recent studies suggest that magnetic reconnection is able to erode substantial amounts of the outer magnetic flux of interplanetary magnetic clouds (MCs) as they propagate in the heliosphere. We quantify and provide a broader context to this process, starting from 263 tabulated interplanetary coronal mass ejections, including MCs, observed over a time period covering 17 years and at a distance of 1 AU from the Sun with Wind (1995-2008) and the two STEREO (2009-2012) spacecraft. Based on several quality factors, including ...

Ruffenach, A.; Lavraud, B.; Farrugia, C.; emoulin, P.; Dasso, S.; Owens, M.; Sauvaud, J.-A.; Rouillard, A.; Lynnyk, A.; Foullon, C.; Savani, N.; Luhmann, J.; Galvin, A.;

Published by: Journal of Geophysical Research: Space Physics      Published on: 01/2015

YEAR: 2015     DOI: 10.1002/2014JA020628

coronal mass ejection; magnetic cloud; magnetic flux rope; magnetic reconnection; parker solar probe; Solar Probe Plus; Solar wind

2014

Application of a Solar Wind Model Driven by Turbulence Dissipation to a 2D Magnetic Field Configuration

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

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

Nonlinear and Linear Timescales near Kinetic Scales in Solar Wind Turbulence

Matthaeus, W.~H.; Oughton, S.; Osman, K.~T.; Servidio, S.; Wan, M.; Gary, S.~P.; Shay, M.~A.; Valentini, F.; Roytershteyn, V.; Karimabadi, H.; Chapman, S.~C.;

Published by: \apj      Published on: 08/2014

YEAR: 2014     DOI: 10.1088/0004-637X/790/2/155

Parker Data Used; magnetohydrodynamics: MHD; Solar wind; Sun: corona; turbulence; Physics - Space Physics; Physics - Plasma Physics

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

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

Technique for measuring and correcting the Taylor microscale

Chuychai, P.; Weygand, J.~M.; Matthaeus, W.~H.; Dasso, S.; Smith, C.~W.; Kivelson, M.~G.;

Published by: Journal of Geophysical Research (Space Physics)      Published on: 06/2014

YEAR: 2014     DOI: 10.1002/2013JA019641

Parker Data Used; Solar wind; magnetic field; correlation functions



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