Identification of features in solar ALMA images and comparison with solar atmospheric models

Result code in IS VaVaI
<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F67985815%3A_____%2F17%3A00485605" target="_blank" >RIV/67985815:_____/17:00485605 - isvavai.cz</a>
Result on the web
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DOI - Digital Object Identifier
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Result language
angličtina
Original language name
Identification of features in solar ALMA images and comparison with solar atmospheric models
Original language description
Various solar features were identified in the full-disc single-dish ALMA images taken at wavelength of 1.2 and 2.8 mm and compared with H.alpha., Ca II K and EUV images and magnetograms. Assuming thermal bremsstrahlung as the dominant radiation mechanism, several models were constructed to calculate the brightness temperature of various solar features (quiet and active solar regions, filaments and coronal holes) in a wavelength range from 0.3 to 10 mm. It is found that model predictions are in a qualitative agreement with ALMA images where active regions appear brighter, while filaments and coronal holes are not discernible from the quiet Sun level. It is also found that in ALMA images regions around magnetic neutral lines appear darker than the quiet Sun. Models predict a critical frequency below which filaments should appear in absorption and above it in emission.
Czech name
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Czech description
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Project
Result was created during the realization of more than one project. More information in the Projects tab.
Continuities
I - Institucionalni podpora na dlouhodoby koncepcni rozvoj vyzkumne organizace

Publication year
2017
Confidentiality
S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů

Article name in the collection
Book of Proceedings: Ninth Workshop Solar Influences on the Magnetosphere, Ionosphere and Atmosphere
ISBN
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ISSN
2367-7570
e-ISSN
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Number of pages
6
Pages from-to
121-126
Publisher name
Bulgarian Academy of Sciences
Place of publication
Sofia
Event location
Sunny Beach
Event date
May 30, 2017
Type of event by nationality
EUR - Evropská akce
UT code for WoS article
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