Spectral features in field-aligned solar wind turbulence from Parker Solar Probe observations
LL Zhao, GP Zank, L Adhikari… - The Astrophysical …, 2020 - iopscience.iop.org
The Astrophysical Journal, 2020•iopscience.iop.org
Abstract Parker Solar Probe (PSP) observed a large variety of Alfvénic fluctuations in the fast
and slow solar wind flow during its two perihelia. The properties of Alfvénic solar wind
turbulence have been studied for decades in the near-Earth environment. A spectral index
of− 5/3 or− 2 for magnetic field fluctuations has been observed using spacecraft
measurements, which can be explained by turbulence theories of nearly incompressible
magnetohydrodynamics (NI MHD) or critical balance. In this study, a rigorous search of field …
and slow solar wind flow during its two perihelia. The properties of Alfvénic solar wind
turbulence have been studied for decades in the near-Earth environment. A spectral index
of− 5/3 or− 2 for magnetic field fluctuations has been observed using spacecraft
measurements, which can be explained by turbulence theories of nearly incompressible
magnetohydrodynamics (NI MHD) or critical balance. In this study, a rigorous search of field …
Abstract
Parker Solar Probe (PSP) observed a large variety of Alfvénic fluctuations in the fast and slow solar wind flow during its two perihelia. The properties of Alfvénic solar wind turbulence have been studied for decades in the near-Earth environment. A spectral index of− 5/3 or− 2 for magnetic field fluctuations has been observed using spacecraft measurements, which can be explained by turbulence theories of nearly incompressible magnetohydrodynamics (NI MHD) or critical balance. In this study, a rigorous search of field-aligned solar wind is applied to PSP measurements for the first time, which yields two events in the apparently slow solar wind. The parallel spectra of the magnetic fluctuations in the inertial range show a
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