TY - JOUR
T1 - Theory and Transport of Nearly Incompressible Magnetohydrodynamic Turbulence
T2 - High Plasma Beta Regime
AU - Adhikari, Laxman
AU - Zank, Gary P.
AU - Wang, Bingbing
AU - Zhao, Lingling
AU - Telloni, Daniele
AU - Pitna, Alex
AU - Opher, Merav
AU - Shrestha, Bishwas
AU - McComas, David J.
AU - Nykyri, Katariina
N1 - Funding Information:
We acknowledge the partial support of a Parker Solar Probe contract SV4-84017, an NSF EPSCoR RII-Track-1 cooperative agreement OIA-1655280, and NASA awards 80NSSC20K1783 and 80NSSC21K1319, and NASA Heliospheric Shield 80NSSC22M0164, and the SWAP instrument effort on the New Horizons project (M99023MJM; PU-A WD1006357), with support from NASA’s New Frontiers Program and the IMAP mission as a part of NASA’s Solar Terrestrial Probes (STP) mission line (80GSFC19C0027). A.P. acknowledges the partial support by the Czech Grant Agency under contract (23-06401S).
Publisher Copyright:
© 2023. The Author(s). Published by the American Astronomical Society.
PY - 2023/8/1
Y1 - 2023/8/1
N2 - Nearly incompressible magnetohydrodynamic (NI MHD) theory for β ∼ 1 (or β ≪ 1) plasma has been developed and applied to the study of solar wind turbulence. The leading-order term in β ∼ 1 or β ≪ 1 plasma describes the majority of 2D turbulence, while the higher-order term describes the minority of slab turbulence. Here, we develop new NI MHD turbulence transport model equations in the high plasma beta regime. The leading-order term in a β ≫ 1 plasma is fully incompressible and admits both structures (flux ropes or magnetic islands) and slab (Alfvén waves) fluctuations. This paper couples the NI MHD turbulence transport equations with three fluid (proton, electron, and pickup ion) equations, and solves the 1D steady-state equations from 1-75 au. The model is tested against 27 yr of Voyager 2 data, and Ulysses and NH SWAP data. The results agree remarkably well, with some scatter, about the theoretical predictions.
AB - Nearly incompressible magnetohydrodynamic (NI MHD) theory for β ∼ 1 (or β ≪ 1) plasma has been developed and applied to the study of solar wind turbulence. The leading-order term in β ∼ 1 or β ≪ 1 plasma describes the majority of 2D turbulence, while the higher-order term describes the minority of slab turbulence. Here, we develop new NI MHD turbulence transport model equations in the high plasma beta regime. The leading-order term in a β ≫ 1 plasma is fully incompressible and admits both structures (flux ropes or magnetic islands) and slab (Alfvén waves) fluctuations. This paper couples the NI MHD turbulence transport equations with three fluid (proton, electron, and pickup ion) equations, and solves the 1D steady-state equations from 1-75 au. The model is tested against 27 yr of Voyager 2 data, and Ulysses and NH SWAP data. The results agree remarkably well, with some scatter, about the theoretical predictions.
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U2 - 10.3847/1538-4357/acde57
DO - 10.3847/1538-4357/acde57
M3 - Article
AN - SCOPUS:85167672745
SN - 0004-637X
VL - 953
JO - Astrophysical Journal
JF - Astrophysical Journal
IS - 1
M1 - 44
ER -