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Found 6 entries in the Bibliography.
Showing entries from 1 through 6
2021 
The nearSun streamer belt solar wind: turbulence and solar wind acceleration Chen, C.; Chandran, B.; Woodham, L.; Jones, S.; Perez, J.; Bourouaine, S.; Bowen, T.; Klein, K.; Moncuquet, M.; Kasper, J.; Bale, S.; Published by: Astronomy and Astrophysics Published on: YEAR: 2021 DOI: "10.1051/00046361/202039872" 
2020 
Twotime energy spectrum of weak magnetohydrodynamic turbulence In this work a weakturbulence closure is used to determine the structure of the twotime power spectrum of weak magnetohydrodynamic (MHD) turbulence from the nonlinear equations describing the dynamics. The twotime energy spectrum is a fundamental quantity in turbulence theory from which most statistical properties of a homogeneous turbulent system can be derived. A closely related quantity, obtained via a spatial Fourier transform, is the twopoint twotime correlation function describing the spacetime correlations arisi ... Perez, Jean; Azelis, Augustus; Bourouaine, Sofiane; Published by: PHYSICAL REVIEW RESEARCH Published on: MAY 19 YEAR: 2020 DOI: 10.1103/PhysRevResearch.2.023189 
Turbulence Characteristics of Switchback and Nonswitchback Intervals Observed by Parker Solar Probe We use Parker Solar Probe (PSP) in situ measurements to analyze the characteristics of solar wind turbulence during the first solar encounter covering radial distances between 35.7R and 41.7R. In our analysis we isolate socalled switchback (SB) intervals (folded magnetic field lines) from nonswitchback (NSB) intervals, which mainly follow the Parker spiral field. Using a technique based on conditioned correlation functions, we estimate the power spectra of Elsasser, magnetic, and bulk velocity fields separately in the SB an ... Bourouaine, Sofiane; Perez, Jean; Klein, Kristopher; Chen, Christopher; Martinovic, Mihailo; Bale, Stuart; Kasper, Justin; Raouafi, Nour; Published by: ASTROPHYSICAL JOURNAL LETTERS Published on: DEC YEAR: 2020 DOI: 10.3847/20418213/abbd4a 
2019 
On the Interpretation of Parker Solar Probe Turbulent Signals In this Letter we propose a practical methodology to interpret future Parker Solar Probe (PSP) turbulent time signals even when Taylor s hypothesis is not valid. By extending Kraichnan s sweeping model used in hydrodynamics we derive the Eulerian spacetime correlation function in magnetohydrodynamic (MHD) turbulence. It is shown that in MHD, the temporal decorrelation of smallscale fluctuations arises from a combination of hydrodynamic sweeping induced by largescale fluid velocity delta u(0) and by the Alfvenic propagation ... Bourouaine, Sofiane; Perez, Jean; Published by: ASTROPHYSICAL JOURNAL LETTERS Published on: JUL 1 YEAR: 2019 DOI: 10.3847/20418213/ab288a 
2018 
In this Letter, we present an analysis of twopoint, twotime correlation functions from highresolution numerical simulations of Reflectiondriven Alfven Turbulence near the Alfven critical point r e . The simulations model the turbulence in a prescribed background solar wind model chosen to match observational constraints. This analysis allows us to investigate the temporal decorrelation of solar wind turbulence and the validity of Taylor s approximation near the heliocentric distance r(c), which Parker Solar Probe (PSP) i ... Bourouaine, Sofiane; Perez, Jean; Published by: ASTROPHYSICAL JOURNAL LETTERS Published on: MAY 10 YEAR: 2018 DOI: 10.3847/20418213/aabccf 
2015 
A MODIFIED VERSION OF TAYLOR\textquoterightS HYPOTHESIS FOR SOLAR PROBE PLUS OBSERVATIONS The Solar Probe Plus (SPP) spacecraft will explore the nearSun 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 solarwind 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: 10.1088/20418205/801/1/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 
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