New Observations of Balmer Continuum Flux in Solar Flares Instrument Description and First Results
The result's identifiers
Result code in IS VaVaI
<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F67985815%3A_____%2F16%3A00462089" target="_blank" >RIV/67985815:_____/16:00462089 - isvavai.cz</a>
Result on the web
<a href="http://dx.doi.org/10.1007/s11207-016-0860-y" target="_blank" >http://dx.doi.org/10.1007/s11207-016-0860-y</a>
DOI - Digital Object Identifier
<a href="http://dx.doi.org/10.1007/s11207-016-0860-y" target="_blank" >10.1007/s11207-016-0860-y</a>
Alternative languages
Result language
angličtina
Original language name
New Observations of Balmer Continuum Flux in Solar Flares Instrument Description and First Results
Original language description
Here we describe a new post-focal instrument, the image selector, with which the Balmer continuum flux can be measured from the whole flare area, in analogy to successful detections of flaring dMe stars. The system was developed and put into operation at the horizontal solar telescope HSFA2 of the OndA (TM) ejov Observatory. We measure the total flux by a fast spectrometer from a limited but well-defined region on the solar disk. Using a system of diaphragms, the disturbing contribution of a bright solar disk can be eliminated as much as possible. Light curves of the measured flux in the spectral range 350 -aEuro parts per thousand 440 nm are processed, together with the images of the flaring area delimited by the appropriate diaphragm. The spectral flux data are flat-fielded, calibrated, and processed to be compared with model predictions. Our analysis of the data proves that the described device is sufficiently sensitive to detect variations in the Balmer continuum during solar flares. Assuming that the Balmer-continuum kernels have at least a similar size as those visible in , we find the flux increase in the Balmer continuum to reach 230 -aEuro parts per thousand 550 % of the quiet continuum during the observed X-class flare. We also found temporal changes in the Balmer continuum flux starting well before the onset of the flare in .
Czech name
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Czech description
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Classification
Type
J<sub>x</sub> - Unclassified - Peer-reviewed scientific article (Jimp, Jsc and Jost)
CEP classification
BN - Astronomy and celestial mechanics, astrophysics
OECD FORD branch
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Result continuities
Project
<a href="/en/project/GAP209%2F12%2F1652" target="_blank" >GAP209/12/1652: Analysis of the non-thermal electron distribution in the solar corona and transition region</a><br>
Continuities
I - Institucionalni podpora na dlouhodoby koncepcni rozvoj vyzkumne organizace
Others
Publication year
2016
Confidentiality
S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů
Data specific for result type
Name of the periodical
Solar Physics
ISSN
0038-0938
e-ISSN
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Volume of the periodical
291
Issue of the periodical within the volume
3
Country of publishing house
NL - THE KINGDOM OF THE NETHERLANDS
Number of pages
11
Pages from-to
779-789
UT code for WoS article
000373232700004
EID of the result in the Scopus database
2-s2.0-84958255959