In this section
@article{Vinogradov:2024:1538-4357/ad5288,
author = {Vinogradov, A and Alexandrova, O and Demoulin, P and Artemyev, A and Maksimovic, M and Mangeney, A and Vasiliev, A and Petrukovich, AA and Bale, S},
doi = {1538-4357/ad5288},
journal = {Astrophysical Journal},
title = {Embedded Coherent Structures from Magnetohydrodynamics to Sub-ion Scales in Turbulent Solar Wind at 0.17 au},
url = {http://dx.doi.org/10.3847/1538-4357/ad5288},
volume = {971},
year = {2024}
}
TY - JOUR
AB - We study intermittent coherent structures in solar wind turbulence from MHD to kinetic plasma scales using Parker Solar Probe data during its first perihelion (at 0.17 au) in the highly Alfvenic slow solar wind. We detect coherent structures using Morlet wavelets. For the first time, we apply a multiscale analysis in physical space. At MHD scales within the inertial range, times scales τ ∈ (1, 102) s, we find (i) current sheets including switchback boundaries and (ii) Alfven vortices. Within these events are embedded structures at smaller scales: typically Alfven vortices at ion scales, τ ∈ (0.08, 1) s, and compressible vortices at sub-ion scales, τ ∈ 8(10−3, 10−2) s. The number of coherent structures grows toward smaller scales: we observe ∼200 events during a 5 hr time interval at MHD scales, ∼103 at ion scales, and ∼104 at sub-ion scales. In general, there are multiple structures of ion and sub-ion scales embedded within one MHD structure. There are also examples of ion and sub-ion scale structures outside MHD structures. To quantify the relative importance of different types of structures, we do a statistical comparison of the observed structures with the expectations of models of the current sheets and vortices. The results show the dominance of Alfven vortices at all scales in contrast to the widespread view of the dominance of current sheets. This means that Alfven vortices are important building blocks of Alfvenic solar wind turbulence.
AU - Vinogradov,A
AU - Alexandrova,O
AU - Demoulin,P
AU - Artemyev,A
AU - Maksimovic,M
AU - Mangeney,A
AU - Vasiliev,A
AU - Petrukovich,AA
AU - Bale,S
DO - 1538-4357/ad5288
PY - 2024///
SN - 0004-637X
TI - Embedded Coherent Structures from Magnetohydrodynamics to Sub-ion Scales in Turbulent Solar Wind at 0.17 au
T2 - Astrophysical Journal
UR - http://dx.doi.org/10.3847/1538-4357/ad5288
VL - 971
ER -