MHD Inertial and Energy-containing Range Turbulence Anisotropy in the Young Solar Wind

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F00216208%3A11320%2F24%3A10492001" target="_blank" >RIV/00216208:11320/24:10492001 - isvavai.cz</a>

Výsledek na webu

<a href="https://verso.is.cuni.cz/pub/verso.fpl?fname=obd_publikace_handle&handle=.8E.7pZmRG" target="_blank" >https://verso.is.cuni.cz/pub/verso.fpl?fname=obd_publikace_handle&handle=.8E.7pZmRG</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.3847/1538-4357/ad2fc4" target="_blank" >10.3847/1538-4357/ad2fc4</a>

Jazyk výsledku

angličtina

Název v původním jazyce

MHD Inertial and Energy-containing Range Turbulence Anisotropy in the Young Solar Wind

Popis výsledku v původním jazyce

We study solar wind turbulence anisotropy in the inertial and energy-containing ranges in the inbound and outbound directions during encounters 1-9 by the Parker Solar Probe (PSP) for distances between similar to 21 and 65 R circle dot. Using the Adhikari et al. approach, we derive theoretical equations to calculate the ratio between the 2D and slab fluctuating magnetic energy, fluctuating kinetic energy, and the outward/inward Elsasser energy in the inertial range. For this, in the energy-containing range, we assume a wavenumber k -1 power law. In the inertial range, for the magnetic field fluctuations and the outward/inward Elsasser energy, we consider that (i) both 2D and slab fluctuations follow a power law of k -5/3, and (ii) the 2D and slab fluctuations follow the power laws with k -5/3 and k -3/2, respectively. For the velocity fluctuations, we assume that both the 2D and slab components follow a k -3/2 power law. We compare the theoretical results of the variance anisotropy in the inertial range with the derived observational values measured by PSP, and find that the energy density of 2D fluctuations is larger than that of the slab fluctuations. The theoretical variance anisotropy in the inertial range relating to the k -5/3 and k -3/2 power laws between 2D and slab turbulence exhibits a smaller value in comparison to assuming the same power law k -5/3 between 2D and slab turbulence. Finally, the observed turbulence energy measured by PSP in the energy-containing range is found to be similar to the theoretical result of a nearly incompressible/slab turbulence description.

Název v anglickém jazyce

MHD Inertial and Energy-containing Range Turbulence Anisotropy in the Young Solar Wind

Popis výsledku anglicky

We study solar wind turbulence anisotropy in the inertial and energy-containing ranges in the inbound and outbound directions during encounters 1-9 by the Parker Solar Probe (PSP) for distances between similar to 21 and 65 R circle dot. Using the Adhikari et al. approach, we derive theoretical equations to calculate the ratio between the 2D and slab fluctuating magnetic energy, fluctuating kinetic energy, and the outward/inward Elsasser energy in the inertial range. For this, in the energy-containing range, we assume a wavenumber k -1 power law. In the inertial range, for the magnetic field fluctuations and the outward/inward Elsasser energy, we consider that (i) both 2D and slab fluctuations follow a power law of k -5/3, and (ii) the 2D and slab fluctuations follow the power laws with k -5/3 and k -3/2, respectively. For the velocity fluctuations, we assume that both the 2D and slab components follow a k -3/2 power law. We compare the theoretical results of the variance anisotropy in the inertial range with the derived observational values measured by PSP, and find that the energy density of 2D fluctuations is larger than that of the slab fluctuations. The theoretical variance anisotropy in the inertial range relating to the k -5/3 and k -3/2 power laws between 2D and slab turbulence exhibits a smaller value in comparison to assuming the same power law k -5/3 between 2D and slab turbulence. Finally, the observed turbulence energy measured by PSP in the energy-containing range is found to be similar to the theoretical result of a nearly incompressible/slab turbulence description.

Druh

J_imp - Článek v periodiku v databázi Web of Science

CEP obor

—

OECD FORD obor

10305 - Fluids and plasma physics (including surface physics)

Projekt

—

Návaznosti

I - Institucionalni podpora na dlouhodoby koncepcni rozvoj vyzkumne organizace

Rok uplatnění

2024

Kód důvěrnosti údajů

S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů

Název periodika

Astrophysical Journal

ISSN

0004-637X

e-ISSN

1538-4357

Svazek periodika

965

Číslo periodika v rámci svazku

1

Stát vydavatele periodika

US - Spojené státy americké

Počet stran výsledku

11

Strana od-do

94

Kód UT WoS článku

001199593300001

EID výsledku v databázi Scopus

2-s2.0-85190171946