Determination of plasma parameters in solar zebra radio sources

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F67985815%3A_____%2F15%3A00449312" target="_blank" >RIV/67985815:_____/15:00449312 - isvavai.cz</a>

Výsledek na webu

<a href="http://dx.doi.org/10.1051/0004-6361/201526785" target="_blank" >http://dx.doi.org/10.1051/0004-6361/201526785</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.1051/0004-6361/201526785" target="_blank" >10.1051/0004-6361/201526785</a>

Jazyk výsledku

angličtina

Název v původním jazyce

Determination of plasma parameters in solar zebra radio sources

Popis výsledku v původním jazyce

We present a new method for determining the magnetic field strength and plasma density in the solar zebra radio sources. Using the double plasma resonance (DPR) model of the zebra emission, we analytically derived the equations for computing the gyroharmonic number s of selected zebra lines and then solved these equations numerically. The method was successfully tested on artificially generated zebras and then applied to observed ones. The magnetic field strength and plasma density in the radio sources were determined. Simultaneously, we evaluated the parameter L-nb = 2(Lb/)(2(Ln)-L-b), where L-n and L-b are the characteristic scale-heights of the plasma density and magnetic field strength in the zebra source, respectively. In models with smaller density gradients, such as those with a barometric density profile, the microwave zebras cannot be produced owing to the strong bremsstrahlung and cyclotron absorptions. We also show that our DPR model is able to explain the zebras with frequency-equidistant zebra lines.

Název v anglickém jazyce

Determination of plasma parameters in solar zebra radio sources

Popis výsledku anglicky

We present a new method for determining the magnetic field strength and plasma density in the solar zebra radio sources. Using the double plasma resonance (DPR) model of the zebra emission, we analytically derived the equations for computing the gyroharmonic number s of selected zebra lines and then solved these equations numerically. The method was successfully tested on artificially generated zebras and then applied to observed ones. The magnetic field strength and plasma density in the radio sources were determined. Simultaneously, we evaluated the parameter L-nb = 2(Lb/)(2(Ln)-L-b), where L-n and L-b are the characteristic scale-heights of the plasma density and magnetic field strength in the zebra source, respectively. In models with smaller density gradients, such as those with a barometric density profile, the microwave zebras cannot be produced owing to the strong bremsstrahlung and cyclotron absorptions. We also show that our DPR model is able to explain the zebras with frequency-equidistant zebra lines.

Druh

J_imp - Článek v periodiku v databázi Web of Science

CEP obor

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OECD FORD obor

10308 - Astronomy (including astrophysics,space science)

Projekt

<a href="/cs/project/GAP209%2F12%2F0103" target="_blank" >GAP209/12/0103: Rádiová a rentgenová diagnostika procesů primárního uvolňování energie ve slunečních erupcích a jejich numerické simulace</a><br>

Návaznosti

I - Institucionalni podpora na dlouhodoby koncepcni rozvoj vyzkumne organizace

Rok uplatnění

2015

Kód důvěrnosti údajů

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

Název periodika

Astronomy & Astrophysics

ISSN

1432-0746

e-ISSN

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Svazek periodika

581

Číslo periodika v rámci svazku

September

Stát vydavatele periodika

FR - Francouzská republika

Počet stran výsledku

6

Strana od-do

"A115/1"-"A115/6"

Kód UT WoS článku

000361803900115

EID výsledku v databázi Scopus

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