Energetics of X-Class Flares at the Minima of 22, 23, and 24 Solar Cycles

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F67985815%3A_____%2F20%3A00538187" target="_blank" >RIV/67985815:_____/20:00538187 - isvavai.cz</a>

Výsledek na webu

<a href="https://doi.org/10.1134/S001679322007018X" target="_blank" >https://doi.org/10.1134/S001679322007018X</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.1134/S001679322007018X" target="_blank" >10.1134/S001679322007018X</a>

Jazyk výsledku

angličtina

Název v původním jazyce

Energetics of X-Class Flares at the Minima of 22, 23, and 24 Solar Cycles

Popis výsledku v původním jazyce

Quite often powerful flares occur during a decrease of solar activity. In this work, we make an attempt to consider X-class flares at the minima of solar activity cycles as a separate group of events. Out of nine X-class flares we selected three such events that occurred at the minima of solar cycles 22-24: SOL1996-07-09T-09:09 (X2.6), SOL2006-12-13T-10:26 (X3.4), and SOL2017-09-06T-11:53 (X9.3) - they were well observed by various instruments. All three selected flares are characterized by significant gamma-ray emission, which indicates ion acceleration during the impulsive phase. For the selected events, we estimated the energetics and distribution of the released free energy of the magnetic field between different flare components, including thermal energy and the energy of accelerated electrons and ions. No preferred energy-release channels have been identified for the considered flares at the solar activity minima. It turned out that the amount of magnetic free energy is several times higher than the amount of thermal energy and the energy of accelerated electrons and ions - the possible causes of this imbalance are discussed.

Název v anglickém jazyce

Energetics of X-Class Flares at the Minima of 22, 23, and 24 Solar Cycles

Popis výsledku anglicky

Quite often powerful flares occur during a decrease of solar activity. In this work, we make an attempt to consider X-class flares at the minima of solar activity cycles as a separate group of events. Out of nine X-class flares we selected three such events that occurred at the minima of solar cycles 22-24: SOL1996-07-09T-09:09 (X2.6), SOL2006-12-13T-10:26 (X3.4), and SOL2017-09-06T-11:53 (X9.3) - they were well observed by various instruments. All three selected flares are characterized by significant gamma-ray emission, which indicates ion acceleration during the impulsive phase. For the selected events, we estimated the energetics and distribution of the released free energy of the magnetic field between different flare components, including thermal energy and the energy of accelerated electrons and ions. No preferred energy-release channels have been identified for the considered flares at the solar activity minima. It turned out that the amount of magnetic free energy is several times higher than the amount of thermal energy and the energy of accelerated electrons and ions - the possible causes of this imbalance are discussed.

Druh

J_imp - Článek v periodiku v databázi Web of Science

CEP obor

—

OECD FORD obor

10308 - Astronomy (including astrophysics,space science)

Projekt

<a href="/cs/project/LM2015067" target="_blank" >LM2015067: Atacama Large Millimeter / Submillimeter Array – účast České republiky</a><br>

Návaznosti

I - Institucionalni podpora na dlouhodoby koncepcni rozvoj vyzkumne organizace

Rok uplatnění

2020

Kód důvěrnosti údajů

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

Název periodika

Geomagnetism and Aeronomy

ISSN

1555-645X

e-ISSN

—

Svazek periodika

60

Číslo periodika v rámci svazku

7

Stát vydavatele periodika

RU - Ruská federace

Počet stran výsledku

7

Strana od-do

929-935

Kód UT WoS článku

000600888300022

EID výsledku v databázi Scopus

2-s2.0-85097924405