Identification of features in solar ALMA images and comparison with solar atmospheric models (CROSBI ID 654574)
Prilog sa skupa u zborniku | izvorni znanstveni rad | međunarodna recenzija
Podaci o odgovornosti
Skokić, Ivica ; Brajša, Roman ; Sudar, Davor ; Kuhar, Matej ; Benz, Arnold O.
engleski
Identification of features in solar ALMA images and comparison with solar atmospheric models
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 Hα, 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.
ALMA ; Sun
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Podaci o prilogu
121-126.
2017.
objavljeno
Podaci o matičnoj publikaciji
Ninth Workshop "Solar Influences on the Magnetosphere, Ionosphere and Atmosphere" Book of Proceedings
Georgieva, Katya ; Kirov, Boian ; Danov, Dimitar
Sunny Beach: Space Research and Technologies Institute
2367-7570
Podaci o skupu
Ninth Workshop "Solar Influences on the Magnetosphere, Ionosphere and Atmosphere"
predavanje
30.05.2017-03.06.2017
Sunčana obala, Bugarska