Time Variations of Observed H alpha Line Profiles and Precipitation Depths of Nonthermal Electrons in a Solar Flare
The result's identifiers
Result code in IS VaVaI
<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F67985815%3A_____%2F17%3A00482508" target="_blank" >RIV/67985815:_____/17:00482508 - isvavai.cz</a>
Result on the web
<a href="http://dx.doi.org/10.3847/1538-4357/aa89e9" target="_blank" >http://dx.doi.org/10.3847/1538-4357/aa89e9</a>
DOI - Digital Object Identifier
<a href="http://dx.doi.org/10.3847/1538-4357/aa89e9" target="_blank" >10.3847/1538-4357/aa89e9</a>
Alternative languages
Result language
angličtina
Original language name
Time Variations of Observed H alpha Line Profiles and Precipitation Depths of Nonthermal Electrons in a Solar Flare
Original language description
We compare time variations of the Ha and X-ray emissions observed during the pre-impulsive and impulsive phases of the C1.1-class solar flare on 2013 June 21 with those of plasma parameters and synthesized X-ray emission from a 1D hydrodynamic numerical model of the flare. The numerical model was calculated assuming that the external energy is delivered to the flaring loop by nonthermal electrons (NTEs). The Ha spectra and images were obtained using the Multi-channel Subtractive Double Pass spectrograph with a time resolution of 50.ms. The X-ray fluxes and spectra were recorded by RHESSI. Pre-flare geometric and thermodynamic parameters of the model and the delivered energy were estimated using RHESSI data. The time variations of the X-ray light curves in various energy bands and those of the Ha intensities and line profiles were well correlated. The timescales of the observed variations agree with the calculated variations of the plasma parameters in the flaring loop footpoints, reflecting the time variations of the vertical extent of the energy deposition layer. Our result shows that the fast time variations of the Ha emission of the flaring kernels can be explained by momentary changes of the deposited energy flux and the variations of the penetration depths of the NTEs.
Czech name
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Czech description
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Classification
Type
J<sub>imp</sub> - Article in a specialist periodical, which is included in the Web of Science database
CEP classification
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OECD FORD branch
10308 - Astronomy (including astrophysics,space science)
Result continuities
Project
<a href="/en/project/GA16-18495S" target="_blank" >GA16-18495S: Advanced solar science with IRIS</a><br>
Continuities
P - Projekt vyzkumu a vyvoje financovany z verejnych zdroju (s odkazem do CEP)
Others
Publication year
2017
Confidentiality
S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů
Data specific for result type
Name of the periodical
Astrophysical Journal
ISSN
0004-637X
e-ISSN
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Volume of the periodical
847
Issue of the periodical within the volume
2
Country of publishing house
US - UNITED STATES
Number of pages
14
Pages from-to
"84/1"-"84/14"
UT code for WoS article
000411698300001
EID of the result in the Scopus database
2-s2.0-85031092346