Transmission of magnetic island modes across interplanetary shocks: Comparison of theory and observations

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F00216208%3A11320%2F23%3A10477761" target="_blank" >RIV/00216208:11320/23:10477761 - isvavai.cz</a>

Výsledek na webu

<a href="https://doi.org/10.1088/1742-6596/2544/1/012009" target="_blank" >https://doi.org/10.1088/1742-6596/2544/1/012009</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.1088/1742-6596/2544/1/012009" target="_blank" >10.1088/1742-6596/2544/1/012009</a>

Jazyk výsledku

angličtina

Název v původním jazyce

Transmission of magnetic island modes across interplanetary shocks: Comparison of theory and observations

Popis výsledku v původním jazyce

Interplanetary shock waves are observed frequently in turbulent solar wind. They naturally enhance the temperature/entropy of the plasma through which they propagate. Moreover, many studies have shown that they also act as an amplifier of the fluctuations incident on the shock front. Solar wind turbulent fluctuations can be well described as the superposition of quasi-2D and slab components, the former being energetically dominant. In this paper, we address the interaction of fast forward shocks observed by the Wind spacecraft at 1AU and quasi-2D turbulent fluctuations in the framework of the Zank et al. (2021) transmission model and we compare model predictions with observations. Our statistical study includes 378 shocks with varying upstream conditions and Mach numbers. We estimate the average ratio of the downstream observed and theoretically predicted power spectra within the inertial range of turbulence. We find that the distributions of this ratio for the whole set and for the subset of shocks that met the assumptions of the model, are remarkably close. We argue that a large statistical spread of the distributions of this ratio is governed by the inherent variation of the upstream conditions. Our findings suggest that the model predicts the downstream fluctuations with a good accuracy and that it may be adopted for a wider class of shocks than it was originally meant for. (C) 2023 Institute of Physics Publishing. All rights reserved.

Název v anglickém jazyce

Transmission of magnetic island modes across interplanetary shocks: Comparison of theory and observations

Popis výsledku anglicky

Interplanetary shock waves are observed frequently in turbulent solar wind. They naturally enhance the temperature/entropy of the plasma through which they propagate. Moreover, many studies have shown that they also act as an amplifier of the fluctuations incident on the shock front. Solar wind turbulent fluctuations can be well described as the superposition of quasi-2D and slab components, the former being energetically dominant. In this paper, we address the interaction of fast forward shocks observed by the Wind spacecraft at 1AU and quasi-2D turbulent fluctuations in the framework of the Zank et al. (2021) transmission model and we compare model predictions with observations. Our statistical study includes 378 shocks with varying upstream conditions and Mach numbers. We estimate the average ratio of the downstream observed and theoretically predicted power spectra within the inertial range of turbulence. We find that the distributions of this ratio for the whole set and for the subset of shocks that met the assumptions of the model, are remarkably close. We argue that a large statistical spread of the distributions of this ratio is governed by the inherent variation of the upstream conditions. Our findings suggest that the model predicts the downstream fluctuations with a good accuracy and that it may be adopted for a wider class of shocks than it was originally meant for. (C) 2023 Institute of Physics Publishing. All rights reserved.

Druh

D - Stať ve sborníku

CEP obor

—

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

2023

Kód důvěrnosti údajů

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

Název statě ve sborníku

Journal of Physics: Conference Series

ISBN

—

ISSN

1742-6588

e-ISSN

—

Počet stran výsledku

9

Strana od-do

—

Název nakladatele

IOP PUBLISHING LTD

Místo vydání

USA

Místo konání akce

Santa Fe

Datum konání akce

31. 10. 2022

Typ akce podle státní příslušnosti

WRD - Celosvětová akce

Kód UT WoS článku

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