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The transport of waves and turbulence beyond the photosphere is central to the coronal heating problem. Turbulence in the quiet solar corona has been modeled on the basis of the nearly incompressible magnetohydrodynamic (NI MHD) theory to describe the transport of low-frequency turbulence in open magnetic field regions. It describes the evolution of the coupled majority quasi-2D and minority slab component, driven by the magnetic carpet and advected by a subsonic, sub-Alfv\ enic flow from the lower corona. In this paper, we ...
Published by: \apj Published on: feb
YEAR: 2023   DOI: 10.3847/1538-4357/acb151
There is a wide consensus that the ubiquitous presence of magnetic reconnection events and the associated impulsive heating (nanoflares) are strong candidates for solving the solar coronal heating problem. Whether nanoflares accelerate particles to high energies like full-sized flares is unknown. We investigate this question by studying the type III radio bursts that the nanoflares may produce on closed loops. The characteristic frequency drifts that type III bursts exhibit can be detected using a novel application of the ti ...
Published by: \apj Published on: dec
YEAR: 2021   DOI: 10.3847/1538-4357/ac2364
We provide a simple geometric explanation for the source of switchbacks and associated large and one-sided transverse flows in the solar wind observed by the Parker Solar Probe (PSP). The more radial, sub-Parker spiral structure of the heliospheric magnetic field observed previously by Ulysses, ACE, and STEREO is created within rarefaction regions where footpoint motion from the source of fast into slow wind at the Sun creates a magnetic fieldline connection across solar wind speed shear. Conversely, when footpoints move fro ...
Published by: The Astrophysical Journal Published on: 03/2021
YEAR: 2021   DOI: 10.3847/1538-4357/abd4e6
Parker Data Used; Active Solar Corona; Solar wind; Solar Coronal Waves; Solar coronal loops; Solar coronal holes; Solar coronal plumes; Solar magnetic fields; interplanetary magnetic fields; Solar spicules; 1988; 1534; 1995; 1485; 1484; 2039; 1503; 824; 1525; Astrophysics - Solar and Stellar Astrophysics; Physics - Plasma Physics; Physics - Space Physics; 85