Wave-Particle Interactions Associated With Io's Auroral Footprint: Evidence of Alfven, Ion Cyclotron, and Whistler Modes

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F68378289%3A_____%2F20%3A00538242" target="_blank" >RIV/68378289:_____/20:00538242 - isvavai.cz</a>

Nalezeny alternativní kódy

RIV/00216208:11320/20:10423279

Výsledek na webu

<a href="https://agupubs.onlinelibrary.wiley.com/doi/10.1029/2020GL088432" target="_blank" >https://agupubs.onlinelibrary.wiley.com/doi/10.1029/2020GL088432</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.1029/2020GL088432" target="_blank" >10.1029/2020GL088432</a>

Jazyk výsledku

angličtina

Název v původním jazyce

Wave-Particle Interactions Associated With Io's Auroral Footprint: Evidence of Alfven, Ion Cyclotron, and Whistler Modes

Popis výsledku v původním jazyce

The electrodynamic coupling between Io and Jupiter gives rise to wave-particle interactions across multiple spatial scales. Here we report observations during Juno's 12th perijove (PJ) high-latitude northern crossing of the flux tube connected to Io's auroral footprint. We focus on plasma wave measurements, clearly differentiating between magnetohydrodynamic (MHD), ion, and electron scales. We find (i) evidence of Alfven waves undergoing a turbulent cascade, suggesting Alfvenic acceleration processes together with observations of bi-directional, broadband electrons: (ii) intense ion cyclotron waves with an estimated heating rate that is consistent with the generation of ion conics reported by Clark et al. (2020, ): and (iii) whistler-mode auroral hiss radiation excited by field-aligned electrons. Such high-resolution wave and particle measurements provide an insight into satellite interactions in unprecedented detail. We further anticipate that these spatially well-constrained results can be more broadly applied to better understand processes of Jupiter's main auroral oval.

Název v anglickém jazyce

Wave-Particle Interactions Associated With Io's Auroral Footprint: Evidence of Alfven, Ion Cyclotron, and Whistler Modes

Popis výsledku anglicky

The electrodynamic coupling between Io and Jupiter gives rise to wave-particle interactions across multiple spatial scales. Here we report observations during Juno's 12th perijove (PJ) high-latitude northern crossing of the flux tube connected to Io's auroral footprint. We focus on plasma wave measurements, clearly differentiating between magnetohydrodynamic (MHD), ion, and electron scales. We find (i) evidence of Alfven waves undergoing a turbulent cascade, suggesting Alfvenic acceleration processes together with observations of bi-directional, broadband electrons: (ii) intense ion cyclotron waves with an estimated heating rate that is consistent with the generation of ion conics reported by Clark et al. (2020, ): and (iii) whistler-mode auroral hiss radiation excited by field-aligned electrons. Such high-resolution wave and particle measurements provide an insight into satellite interactions in unprecedented detail. We further anticipate that these spatially well-constrained results can be more broadly applied to better understand processes of Jupiter's main auroral oval.

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

<a href="/cs/project/LTAUSA17070" target="_blank" >LTAUSA17070: Elektromagnetické vlny v planetárních ionosférách a magnetosférách</a><br>

Návaznosti

I - Institucionalni podpora na dlouhodoby koncepcni rozvoj vyzkumne organizace

Rok uplatnění

2020

Kód důvěrnosti údajů

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

Název periodika

Geophysical Research Letters

ISSN

0094-8276

e-ISSN

—

Svazek periodika

47

Číslo periodika v rámci svazku

22

Stát vydavatele periodika

US - Spojené státy americké

Počet stran výsledku

10

Strana od-do

e2020GL088432

Kód UT WoS článku

000595819700009

EID výsledku v databázi Scopus

2-s2.0-85091491488