Numerical Simulation of Sub-Terahertz Emission of the Flare Chromosphere: the Event of July 4, 2012

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F67985815%3A_____%2F21%3A00552258" target="_blank" >RIV/67985815:_____/21:00552258 - isvavai.cz</a>

Výsledek na webu

<a href="https://doi.org/10.1134/S0016793221070136" target="_blank" >https://doi.org/10.1134/S0016793221070136</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.1134/S0016793221070136" target="_blank" >10.1134/S0016793221070136</a>

Jazyk výsledku

angličtina

Název v původním jazyce

Numerical Simulation of Sub-Terahertz Emission of the Flare Chromosphere: the Event of July 4, 2012

Popis výsledku v původním jazyce

The temporal evolution of thermal bremsstrahlung sub-THz emission from a flare chromosphere and transition region is analyzed based on the F-CHROMA solar flare model database (https://www.fchroma.org ) and solar flare observations with the RT-7.5 radio telescope at 93 and 140 GHz on July 4, 2012. The model is based on the RADYN numerical code, which describes the response of chromospheric background plasma to the action of a beam of accelerated electrons in the form of a triangular pulse. The positive slope of the spectrum in the sub-THz frequency range has been formed over the entire burst. A thin layer of low temperature and high plasma density (the so-called chromospheric condensation) appears. It moves to the region of higher altitudes and effectively absorbs the sub-THz emission. It is shown based on the RHESSI hard X-ray observations that the chromospheric thermal plasma cannot provide the observed sub-THz emission fluxes during the solar flare on July 4, 2012. The cause of the obtained discrepancy is discussed.

Název v anglickém jazyce

Numerical Simulation of Sub-Terahertz Emission of the Flare Chromosphere: the Event of July 4, 2012

Popis výsledku anglicky

The temporal evolution of thermal bremsstrahlung sub-THz emission from a flare chromosphere and transition region is analyzed based on the F-CHROMA solar flare model database (https://www.fchroma.org ) and solar flare observations with the RT-7.5 radio telescope at 93 and 140 GHz on July 4, 2012. The model is based on the RADYN numerical code, which describes the response of chromospheric background plasma to the action of a beam of accelerated electrons in the form of a triangular pulse. The positive slope of the spectrum in the sub-THz frequency range has been formed over the entire burst. A thin layer of low temperature and high plasma density (the so-called chromospheric condensation) appears. It moves to the region of higher altitudes and effectively absorbs the sub-THz emission. It is shown based on the RHESSI hard X-ray observations that the chromospheric thermal plasma cannot provide the observed sub-THz emission fluxes during the solar flare on July 4, 2012. The cause of the obtained discrepancy is discussed.

Druh

J_imp - Článek v periodiku v databázi Web of Science

CEP obor

—

OECD FORD obor

10308 - Astronomy (including astrophysics,space science)

Projekt

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

Návaznosti

I - Institucionalni podpora na dlouhodoby koncepcni rozvoj vyzkumne organizace

Rok uplatnění

2021

Kód důvěrnosti údajů

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

Název periodika

Geomagnetism and Aeronomy

ISSN

0016-7932

e-ISSN

1555-645X

Svazek periodika

61

Číslo periodika v rámci svazku

7

Stát vydavatele periodika

RU - Ruská federace

Počet stran výsledku

7

Strana od-do

1045-1051

Kód UT WoS článku

000736717300020

EID výsledku v databázi Scopus

2-s2.0-85122082341