Suppression of Hydrogen Emission in an X-class White-light 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%3A00479466" target="_blank" >RIV/67985815:_____/17:00479466 - isvavai.cz</a>
Result on the web
<a href="http://dx.doi.org/10.3847/1538-4357/aa5da8" target="_blank" >http://dx.doi.org/10.3847/1538-4357/aa5da8</a>
DOI - Digital Object Identifier
<a href="http://dx.doi.org/10.3847/1538-4357/aa5da8" target="_blank" >10.3847/1538-4357/aa5da8</a>
Alternative languages
Result language
angličtina
Original language name
Suppression of Hydrogen Emission in an X-class White-light Solar Flare
Original language description
We present unique NUV observations of a well-observed X-class flare from NOAA 12087 obtained at the Ondrejov Observatory. The flare shows a strong white-light continuum but no detectable emission in the higher Balmer and Lyman lines. Reuven Ramaty High-Energy Solar Spectroscopic Imager and Fermi observations indicate an extremely hard X-ray spectrum and gamma-ray emission. We use the RADYN radiative hydrodynamic code to perform two types of simulations: one where an energy of 3 x 10(11) erg cm(-2) s(-1) is deposited by an electron beam with a spectral index of approximate to 3, and a second where the same energy is applied directly to the photosphere. The combination of observations and simulations allows us to conclude that the white-light emission and the suppression or complete lack of hydrogen emission lines is best explained by a model where the dominant energy deposition layer is located in the lower layers of the solar atmosphere, rather than the chromosphere.
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
837
Issue of the periodical within the volume
1
Country of publishing house
US - UNITED STATES
Number of pages
9
Pages from-to
"46/1"-"46/9"
UT code for WoS article
000395918600011
EID of the result in the Scopus database
2-s2.0-85015163014