Turbulent Energy Dissipation at Fast Interplanetary Shocks: Solar Orbiter and Wind Observations

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F00216208%3A11320%2F24%3A10493202" target="_blank" >RIV/00216208:11320/24:10493202 - isvavai.cz</a>

Výsledek na webu

<a href="https://physics.mff.cuni.cz/wds/proc/pdf24/WDS24_10_f2_Park.pdf" target="_blank" >https://physics.mff.cuni.cz/wds/proc/pdf24/WDS24_10_f2_Park.pdf</a>

DOI - Digital Object Identifier

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Jazyk výsledku

angličtina

Název v původním jazyce

Turbulent Energy Dissipation at Fast Interplanetary Shocks: Solar Orbiter and Wind Observations

Popis výsledku v původním jazyce

We present an analysis of turbulence evolution at interplanetary (IP) shocksobserved by Solar Orbiter (at ALMOST EQUAL TO 0.5 au) and Wind (at 1 au). IP shocks formed byinterplanetary coronal mass ejections (ICMEs) and stream interaction regions (SIRs)are critical sites for wave generation and particle acceleration in the heliosphere.The energy dissipation of solar wind turbulence in small scales is affected by variousquantities, such as cross-helicity. Using two fast forward (FF) and reverse (FR)shock pairs, we examine the evolution of turbulence, focusing on the transition rangespectral index (αtr) and its dependence on shock-related processes. We reveal abruptchanges in plasma properties across shocks, supporting the hypothesis that IP shocksact as thin boundaries between distinct plasma regions. In the upstream of a nearlyoblique FF shock at Solar Orbiter compared to other quasi-perpendicular shocks,spectral steepening is likely driven by wave activities associated with backstreamingparticles reflected from the shock. Furthermore, αtr generally shows little correlationwith local plasma parameters. This suggests that wave-particle interaction ratherthan local plasma variations govern turbulent energy dissipation at shocks, and waveactivities need to be considered in defining the &apos;effective thickness&apos; of collisionlessshocks. Our results extend insights into the broader role of shocks in modulatingenergy transfer in the heliosphere.

Název v anglickém jazyce

Turbulent Energy Dissipation at Fast Interplanetary Shocks: Solar Orbiter and Wind Observations

Popis výsledku anglicky

We present an analysis of turbulence evolution at interplanetary (IP) shocksobserved by Solar Orbiter (at ALMOST EQUAL TO 0.5 au) and Wind (at 1 au). IP shocks formed byinterplanetary coronal mass ejections (ICMEs) and stream interaction regions (SIRs)are critical sites for wave generation and particle acceleration in the heliosphere.The energy dissipation of solar wind turbulence in small scales is affected by variousquantities, such as cross-helicity. Using two fast forward (FF) and reverse (FR)shock pairs, we examine the evolution of turbulence, focusing on the transition rangespectral index (αtr) and its dependence on shock-related processes. We reveal abruptchanges in plasma properties across shocks, supporting the hypothesis that IP shocksact as thin boundaries between distinct plasma regions. In the upstream of a nearlyoblique FF shock at Solar Orbiter compared to other quasi-perpendicular shocks,spectral steepening is likely driven by wave activities associated with backstreamingparticles reflected from the shock. Furthermore, αtr generally shows little correlationwith local plasma parameters. This suggests that wave-particle interaction ratherthan local plasma variations govern turbulent energy dissipation at shocks, and waveactivities need to be considered in defining the &apos;effective thickness&apos; of collisionlessshocks. Our results extend insights into the broader role of shocks in modulatingenergy transfer in the heliosphere.

Druh

D - Stať ve sborníku

CEP obor

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OECD FORD obor

10305 - Fluids and plasma physics (including surface physics)

Projekt

<a href="/cs/project/GA23-06401S" target="_blank" >GA23-06401S: Kde a jak je sluneční vítr urychlován a zahříván a jak tyto procesy ovlivňují jeho vývoj?</a><br>

Návaznosti

P - Projekt vyzkumu a vyvoje financovany z verejnych zdroju (s odkazem do CEP)

Rok uplatnění

2024

Kód důvěrnosti údajů

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

Název statě ve sborníku

WDS&apos;24 Proceedings of Contributed Papers - Physics

ISBN

978-80-7378-520-8

ISSN

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e-ISSN

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Počet stran výsledku

10

Strana od-do

72-81

Název nakladatele

Matfyzpress

Místo vydání

Praha

Místo konání akce

Praha

Datum konání akce

4. 6. 2024

Typ akce podle státní příslušnosti

EUR - Evropská akce

Kód UT WoS článku

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