Quasiperiodic Emissions: Fine Structure Corresponding to a Bouncing Wave

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F68378289%3A_____%2F24%3A00581778" target="_blank" >RIV/68378289:_____/24:00581778 - isvavai.cz</a>

Nalezeny alternativní kódy

RIV/00216208:11320/24:10491967

Výsledek na webu

<a href="https://agupubs.onlinelibrary.wiley.com/doi/10.1029/2023GL106459" target="_blank" >https://agupubs.onlinelibrary.wiley.com/doi/10.1029/2023GL106459</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.1029/2023GL106459" target="_blank" >10.1029/2023GL106459</a>

Jazyk výsledku

angličtina

Název v původním jazyce

Quasiperiodic Emissions: Fine Structure Corresponding to a Bouncing Wave

Popis výsledku v původním jazyce

Quasiperiodic (QP) emissions are whistler-mode electromagnetic waves observed in the Earth's inner magnetosphere whose intensity has a nearly periodic time modulation with typical modulation periods on the order of minutes. Some events exhibit, on top of the main modulation period, an additional fine inner modulation with modulation periods on the order of seconds. We use high-resolution multi-component electromagnetic wave data obtained by the Van Allen Probes spacecraft to investigate one such event. Detailed wave analysis demonstrates that the fine inner modulation is due to a wave packet bouncing back and forth between the hemispheres. The presence of a density duct is important for the formation of the event, as demonstrated by the increased ratio of wave power propagating away from the equator (a tentative source region) within the duct. The main QP modulation period corresponds to the plasma number density modulation observed just outside the plasmasphere.

Název v anglickém jazyce

Quasiperiodic Emissions: Fine Structure Corresponding to a Bouncing Wave

Popis výsledku anglicky

Quasiperiodic (QP) emissions are whistler-mode electromagnetic waves observed in the Earth's inner magnetosphere whose intensity has a nearly periodic time modulation with typical modulation periods on the order of minutes. Some events exhibit, on top of the main modulation period, an additional fine inner modulation with modulation periods on the order of seconds. We use high-resolution multi-component electromagnetic wave data obtained by the Van Allen Probes spacecraft to investigate one such event. Detailed wave analysis demonstrates that the fine inner modulation is due to a wave packet bouncing back and forth between the hemispheres. The presence of a density duct is important for the formation of the event, as demonstrated by the increased ratio of wave power propagating away from the equator (a tentative source region) within the duct. The main QP modulation period corresponds to the plasma number density modulation observed just outside the plasmasphere.

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

Výsledek vznikl pri realizaci vícero projektů. Více informací v záložce Projekty.

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

Geophysical Research Letters

ISSN

0094-8276

e-ISSN

1944-8007

Svazek periodika

51

Číslo periodika v rámci svazku

2

Stát vydavatele periodika

US - Spojené státy americké

Počet stran výsledku

9

Strana od-do

e2023GL106459

Kód UT WoS článku

001142600800001

EID výsledku v databázi Scopus

2-s2.0-85182405152