Pulse-beam heating of deep atmospheric layers, their oscillations and shocks modulating the flare reconnection

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F60076658%3A12310%2F19%3A43899188" target="_blank" >RIV/60076658:12310/19:43899188 - isvavai.cz</a>

Nalezeny alternativní kódy

RIV/67985815:_____/19:00511188

Výsledek na webu

<a href="https://www.aanda.org/articles/aa/abs/2019/05/aa35188-19/aa35188-19.html" target="_blank" >https://www.aanda.org/articles/aa/abs/2019/05/aa35188-19/aa35188-19.html</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.1051/0004-6361/201935188" target="_blank" >10.1051/0004-6361/201935188</a>

Jazyk výsledku

angličtina

Název v původním jazyce

Pulse-beam heating of deep atmospheric layers, their oscillations and shocks modulating the flare reconnection

Popis výsledku v původním jazyce

Aims. We study the processes occurring after a sudden heating of deep atmospheric layers at the flare arcade footpoints, which is assumed to be caused by particle beams. Methods. For the numerical simulations we adopt a 2D magnetohydrodynamic (MHD) model, in which we solve a full set of the time-dependent MHD equations by means of the FLASH code, using the adaptive mesh refinement (AMR) method. Results. In the initial state we consider a model of the solar atmosphere with densities according to the VAL-C model and the magnetic field arcade having the X-point structure above, where the magnetic reconnection is assumed. We found that the sudden pulse-beam heating of deep atmospheric layers at the flare arcade footpoints generates two magnetohydrodynamic shocks, one propagating upwards and the second propagating downwards in the solar atmosphere. The downward-moving shock is reflected at deep and dense atmospheric layers and triggers oscillations of these layers. The period of these oscillations in our case is about 174 s. These oscillations generate the upward-moving magnetohydrodynamic waves that can influence the flare magnetic reconnection in a quasi-periodic way. These processes require a sudden heating in very localized regions in dense atmospheric layers; therefore, they can be also associated with seismic waves.

Název v anglickém jazyce

Pulse-beam heating of deep atmospheric layers, their oscillations and shocks modulating the flare reconnection

Popis výsledku anglicky

Aims. We study the processes occurring after a sudden heating of deep atmospheric layers at the flare arcade footpoints, which is assumed to be caused by particle beams. Methods. For the numerical simulations we adopt a 2D magnetohydrodynamic (MHD) model, in which we solve a full set of the time-dependent MHD equations by means of the FLASH code, using the adaptive mesh refinement (AMR) method. Results. In the initial state we consider a model of the solar atmosphere with densities according to the VAL-C model and the magnetic field arcade having the X-point structure above, where the magnetic reconnection is assumed. We found that the sudden pulse-beam heating of deep atmospheric layers at the flare arcade footpoints generates two magnetohydrodynamic shocks, one propagating upwards and the second propagating downwards in the solar atmosphere. The downward-moving shock is reflected at deep and dense atmospheric layers and triggers oscillations of these layers. The period of these oscillations in our case is about 174 s. These oscillations generate the upward-moving magnetohydrodynamic waves that can influence the flare magnetic reconnection in a quasi-periodic way. These processes require a sudden heating in very localized regions in dense atmospheric layers; therefore, they can be also associated with seismic waves.

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

P - Projekt vyzkumu a vyvoje financovany z verejnych zdroju (s odkazem do CEP)

Rok uplatnění

2019

Kód důvěrnosti údajů

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

Název periodika

Astronomy &amp; Astrophysics

ISSN

1432-0746

e-ISSN

—

Svazek periodika

625

Číslo periodika v rámci svazku

APR 29 2019

Stát vydavatele periodika

FR - Francouzská republika

Počet stran výsledku

7

Strana od-do

—

Kód UT WoS článku

000466311600001

EID výsledku v databázi Scopus

2-s2.0-85065232225