Magnetospheric Line Radiation: Temporal Modulation Corresponding to a Bouncing Wave

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F68378289%3A_____%2F24%3A00599442" target="_blank" >RIV/68378289:_____/24:00599442 - isvavai.cz</a>

Nalezeny alternativní kódy

RIV/00216208:11320/24:10492096

Výsledek na webu

<a href="https://agupubs.onlinelibrary.wiley.com/doi/10.1029/2024GL111477" target="_blank" >https://agupubs.onlinelibrary.wiley.com/doi/10.1029/2024GL111477</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.1029/2024GL111477" target="_blank" >10.1029/2024GL111477</a>

Jazyk výsledku

angličtina

Název v původním jazyce

Magnetospheric Line Radiation: Temporal Modulation Corresponding to a Bouncing Wave

Popis výsledku v původním jazyce

Magnetospheric line radiation (MLR) is a peculiar type of whistler-mode emissions formed by several similarly spaced spectral lines, whose frequencies may vary with time. These emissions typically occur at frequencies between about 1 and 8 kHz and are observed in both ground-based and satellite measurements. However, their origin and source locations are not yet understood, as their detection by spacecraft instruments is challenging due to the limited frequency resolution of onboard wave measurements. We use high-resolution multicomponent wave data obtained by the Van Allen Probes to demonstrate that, in addition to the frequency modulation, MLR events possess a temporal modulation with periods on the order of seconds, which may be related to the wave bouncing between hemispheres. Observed modulation periods are used to estimate a tentative source L-shell. The modulation periods are shorter for events with larger frequency spacing, and the estimated source L-shells correlate with model plasmapause locations.

Název v anglickém jazyce

Magnetospheric Line Radiation: Temporal Modulation Corresponding to a Bouncing Wave

Popis výsledku anglicky

Magnetospheric line radiation (MLR) is a peculiar type of whistler-mode emissions formed by several similarly spaced spectral lines, whose frequencies may vary with time. These emissions typically occur at frequencies between about 1 and 8 kHz and are observed in both ground-based and satellite measurements. However, their origin and source locations are not yet understood, as their detection by spacecraft instruments is challenging due to the limited frequency resolution of onboard wave measurements. We use high-resolution multicomponent wave data obtained by the Van Allen Probes to demonstrate that, in addition to the frequency modulation, MLR events possess a temporal modulation with periods on the order of seconds, which may be related to the wave bouncing between hemispheres. Observed modulation periods are used to estimate a tentative source L-shell. The modulation periods are shorter for events with larger frequency spacing, and the estimated source L-shells correlate with model plasmapause locations.

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

19

Stát vydavatele periodika

US - Spojené státy americké

Počet stran výsledku

9

Strana od-do

e2024GL111477

Kód UT WoS článku

001328071200001

EID výsledku v databázi Scopus

2-s2.0-85206216612