The Impact of Plasma Density Gradients on Lower Band Chorus Wave Propagation

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F68378289%3A_____%2F25%3A00618614" target="_blank" >RIV/68378289:_____/25:00618614 - isvavai.cz</a>

Nalezeny alternativní kódy

RIV/00216208:11320/25:10510160

Výsledek na webu

<a href="https://agupubs.onlinelibrary.wiley.com/doi/10.1029/2024GL113258" target="_blank" >https://agupubs.onlinelibrary.wiley.com/doi/10.1029/2024GL113258</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.1029/2024GL113258" target="_blank" >10.1029/2024GL113258</a>

Jazyk výsledku

angličtina

Název v původním jazyce

The Impact of Plasma Density Gradients on Lower Band Chorus Wave Propagation

Popis výsledku v původním jazyce

Plasma density gradients, such as those that occur on plasmaspheric plume boundaries, have been shown to increase the obliquity of lower band chorus. Here, for the first time, this relationship is investigated more generally by considering the wave normal angle, theta k ${theta }_{k}$, as a function of the magnitude of all observed density gradients. Both case studies, and a statistical analysis, reveal a direct correspondence between the magnitude of density gradients and wave obliquity, with theta k ${theta }_{k}$ increasing near stronger density gradients. Wave propagation is also investigated as a function of local plasma density, revealing that chorus is more often oblique when observed in lower density mediums, and more field-aligned in higher density regions. This result highlights the importance of retaining the intrinsic physical coupling between wave propagation properties and the cold plasma density, since both parameters strongly influence the calculation of the diffusion coefficients used to quantify wave-particle interactions in the inner-magnetosphere.

Název v anglickém jazyce

The Impact of Plasma Density Gradients on Lower Band Chorus Wave Propagation

Popis výsledku anglicky

Plasma density gradients, such as those that occur on plasmaspheric plume boundaries, have been shown to increase the obliquity of lower band chorus. Here, for the first time, this relationship is investigated more generally by considering the wave normal angle, theta k ${theta }_{k}$, as a function of the magnitude of all observed density gradients. Both case studies, and a statistical analysis, reveal a direct correspondence between the magnitude of density gradients and wave obliquity, with theta k ${theta }_{k}$ increasing near stronger density gradients. Wave propagation is also investigated as a function of local plasma density, revealing that chorus is more often oblique when observed in lower density mediums, and more field-aligned in higher density regions. This result highlights the importance of retaining the intrinsic physical coupling between wave propagation properties and the cold plasma density, since both parameters strongly influence the calculation of the diffusion coefficients used to quantify wave-particle interactions in the inner-magnetosphere.

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/LUAUS23152" target="_blank" >LUAUS23152: Elektrodynamika magnetosfér a ionosfér Země, Jupiteru a Marsu</a><br>

Návaznosti

I - Institucionalni podpora na dlouhodoby koncepcni rozvoj vyzkumne organizace

Rok uplatnění

2025

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

1944-8007

Svazek periodika

52

Číslo periodika v rámci svazku

6

Stát vydavatele periodika

US - Spojené státy americké

Počet stran výsledku

12

Strana od-do

e2024GL113258

Kód UT WoS článku

001447287300001

EID výsledku v databázi Scopus

2-s2.0-105000427161