Dynamics and Characteristics of Waves in the Zebra Radio Source
Identifikátory výsledku
Kód výsledku v IS VaVaI
<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F67985815%3A_____%2F22%3A00556100" target="_blank" >RIV/67985815:_____/22:00556100 - isvavai.cz</a>
Výsledek na webu
<a href="https://doi.org/10.1007/s11207-022-01950-5" target="_blank" >https://doi.org/10.1007/s11207-022-01950-5</a>
DOI - Digital Object Identifier
<a href="http://dx.doi.org/10.1007/s11207-022-01950-5" target="_blank" >10.1007/s11207-022-01950-5</a>
Alternativní jazyky
Jazyk výsledku
angličtina
Název v původním jazyce
Dynamics and Characteristics of Waves in the Zebra Radio Source
Popis výsledku v původním jazyce
We analyzed the 17 August 1998 zebra event and showed that some quasi-periodic oscillations modulate the zebra-stripe frequencies. We determined the period of these oscillations as P-n = 2.01 +/- 0.03 (in numbers of zebra stripes) and as P-f = 11.8 +/- 0.17 MHz. In the first part of the analyzed zebra, we found a stable density wave that slowly propagated with the frequency drift less than 0.4 MHz s(-1). Then, a stationary density wave appeared followed by a transformation of the waves to ones with longer periods. These long-period waves were recorded before and after the time interval when no zebra stripes were observed. We interpreted these density waves as magnetosonic waves. We calculated their wavelength and propagating velocity, considering two types of density models of the solar atmosphere. We also estimated the characteristic density and magnetic-field strength as N approximate to 9.2 x 10(8) cm(-1) and B approximate to 0.73 G, respectively. We found similar velocities derived from drifts of the density wave and velocities calculated from the density and magnetic-field strength considering gyro-harmonic numbers of zebra stripes.
Název v anglickém jazyce
Dynamics and Characteristics of Waves in the Zebra Radio Source
Popis výsledku anglicky
We analyzed the 17 August 1998 zebra event and showed that some quasi-periodic oscillations modulate the zebra-stripe frequencies. We determined the period of these oscillations as P-n = 2.01 +/- 0.03 (in numbers of zebra stripes) and as P-f = 11.8 +/- 0.17 MHz. In the first part of the analyzed zebra, we found a stable density wave that slowly propagated with the frequency drift less than 0.4 MHz s(-1). Then, a stationary density wave appeared followed by a transformation of the waves to ones with longer periods. These long-period waves were recorded before and after the time interval when no zebra stripes were observed. We interpreted these density waves as magnetosonic waves. We calculated their wavelength and propagating velocity, considering two types of density models of the solar atmosphere. We also estimated the characteristic density and magnetic-field strength as N approximate to 9.2 x 10(8) cm(-1) and B approximate to 0.73 G, respectively. We found similar velocities derived from drifts of the density wave and velocities calculated from the density and magnetic-field strength considering gyro-harmonic numbers of zebra stripes.
Klasifikace
Druh
J<sub>imp</sub> - Článek v periodiku v databázi Web of Science
CEP obor
—
OECD FORD obor
10308 - Astronomy (including astrophysics,space science)
Návaznosti výsledku
Projekt
<a href="/cs/project/GA20-07908S" target="_blank" >GA20-07908S: Třírozměrná magnetická rekonexe v počátečních fázích slunečních erupcí: Pozorování a Standardní model ve 3D</a><br>
Návaznosti
I - Institucionalni podpora na dlouhodoby koncepcni rozvoj vyzkumne organizace
Ostatní
Rok uplatnění
2022
Kód důvěrnosti údajů
S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů
Údaje specifické pro druh výsledku
Název periodika
Solar Physics
ISSN
0038-0938
e-ISSN
1573-093X
Svazek periodika
297
Číslo periodika v rámci svazku
3
Stát vydavatele periodika
NL - Nizozemsko
Počet stran výsledku
8
Strana od-do
35
Kód UT WoS článku
000768833100001
EID výsledku v databázi Scopus
2-s2.0-85126527579