Dependence of Properties of Magnetospheric Line Radiation and Quasiperiodic Emissions On Solar Wind Parameters and Geomagnetic Activity

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F68378289%3A_____%2F19%3A00512067" target="_blank" >RIV/68378289:_____/19:00512067 - isvavai.cz</a>

Nalezeny alternativní kódy

RIV/00216208:11320/19:10396105

Výsledek na webu

<a href="https://hal-insu.archives-ouvertes.fr/insu-02086020/file/Bezd-kov-_et_al-2019-Journal_of_Geophysical_Research__Space_Physics.pdf" target="_blank" >https://hal-insu.archives-ouvertes.fr/insu-02086020/file/Bezd-kov-_et_al-2019-Journal_of_Geophysical_Research__Space_Physics.pdf</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.1029/2018JA026378" target="_blank" >10.1029/2018JA026378</a>

Jazyk výsledku

angličtina

Název v původním jazyce

Dependence of Properties of Magnetospheric Line Radiation and Quasiperiodic Emissions On Solar Wind Parameters and Geomagnetic Activity

Popis výsledku v původním jazyce

Very low frequency electromagnetic waves in the inner magnetosphere sometimes exhibit either frequency or time modulation. These phenomena are called, respectively, magnetospheric line radiation (MLR) and quasiperiodic (QP) emissions. Data from Detection of Electro-Magnetic Emissions Transmitted from Earthquake Regions spacecraft were used to analyze their properties, such as MLR frequency spacing, QP modulation period, and QP intensity as functions of geomagnetic activity and solar wind parameters. Altogether, 1,152 MLR events and 2,172 QP emissions were analyzed. It is shown that the influence of the analyzed parameters on QP emissions is different for QP events with modulation periods shorter/longer than 20 s. While the properties of QP events with long modulation periods are significantly related to the geomagnetic activity and solar wind parameters, no such dependences are observed for events with short modulation periods. This suggests that there might be two types of QP emissions generated by two different mechanisms. It is further shown that there seems to be no relation between the properties of QP and MLR events observed at the same times. Finally, the event properties do not seem to be related to the whistler occurrence rate.

Název v anglickém jazyce

Dependence of Properties of Magnetospheric Line Radiation and Quasiperiodic Emissions On Solar Wind Parameters and Geomagnetic Activity

Popis výsledku anglicky

Very low frequency electromagnetic waves in the inner magnetosphere sometimes exhibit either frequency or time modulation. These phenomena are called, respectively, magnetospheric line radiation (MLR) and quasiperiodic (QP) emissions. Data from Detection of Electro-Magnetic Emissions Transmitted from Earthquake Regions spacecraft were used to analyze their properties, such as MLR frequency spacing, QP modulation period, and QP intensity as functions of geomagnetic activity and solar wind parameters. Altogether, 1,152 MLR events and 2,172 QP emissions were analyzed. It is shown that the influence of the analyzed parameters on QP emissions is different for QP events with modulation periods shorter/longer than 20 s. While the properties of QP events with long modulation periods are significantly related to the geomagnetic activity and solar wind parameters, no such dependences are observed for events with short modulation periods. This suggests that there might be two types of QP emissions generated by two different mechanisms. It is further shown that there seems to be no relation between the properties of QP and MLR events observed at the same times. Finally, the event properties do not seem to be related to the whistler occurrence rate.

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

2019

Kód důvěrnosti údajů

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

Název periodika

Journal of Geophysical Research: Space Physics

ISSN

2169-9380

e-ISSN

—

Svazek periodika

124

Číslo periodika v rámci svazku

4

Stát vydavatele periodika

US - Spojené státy americké

Počet stran výsledku

17

Strana od-do

2552-2568

Kód UT WoS článku

000477707800014

EID výsledku v databázi Scopus

2-s2.0-85063948906