Počet záznamů: 1
First analysis of solar structures in 1.21 mm full-disc ALMA image of the Sun
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SYSNO ASEP 0494658 Druh ASEP J - Článek v odborném periodiku Zařazení RIV J - Článek v odborném periodiku Poddruh J Článek ve WOS Název First analysis of solar structures in 1.21 mm full-disc ALMA image of the Sun Tvůrce(i) Brajša, R. (HR)
Sudar, D. (HR)
Benz, A. O. (CH)
Skokić, I. (HR)
Bárta, Miroslav (ASU-R) RID, ORCID
de Pontieu, B. (US)
Kim, S. (KR)
Kobelski, A. (US)
Kuhar, M. (CH)
Shimojo, M. (JP)
Wedemeyer, S. (NO)
White, S.M. (US)
Yagoubov, P. (DE)
Yan, Y. (CN)Číslo článku A17 Zdroj.dok. Astronomy & Astrophysics. - : EDP Sciences - ISSN 0004-6361
Roč. 613, May (2018)Poč.str. 9 s. Forma vydání Online - E Jazyk dok. eng - angličtina Země vyd. FR - Francie Klíč. slova Sun ; radio radiation ; chromosphere Vědní obor RIV BN - Astronomie a nebeská mechanika, astrofyzika Obor OECD Astronomy (including astrophysics,space science) CEP LM2015067 GA MŠMT - Ministerstvo školství, mládeže a tělovýchovy Institucionální podpora ASU-R - RVO:67985815 UT WOS 000432981200002 EID SCOPUS 85048019828 DOI 10.1051/0004-6361/201730656 Anotace The first aim of the present work is to identify different structures in the solar atmosphere seen in the optical, infrared, and EUV parts of the spectrum (quiet Sun, active regions, prominences on the disc, magnetic inversion lines, coronal holes and coronal bright points) in a full-disc solar ALMA image. The second aim is to measure the intensities (brightness temperatures) of those structures and to compare them with the corresponding quiet Sun level. A full-disc solar image at 1.21 mm obtained on December 18, 2015, during a CSV-EOC campaign with ALMA is calibrated and compared with full-disc solar images from the same day in H alpha line, in He I 1083 nm line core, and with various SDO images (AIA at 170 nm, 30.4 nm, 21.1 nm, 19.3 nm, and 17.1 nm and HMI magnetogram). The brightness temperatures of various structures are determined by averaging over corresponding regions of interest in the calibrated ALMA image. Positions of the quiet Sun, active regions, prominences on the disc, magnetic inversion lines, coronal holes and coronal bright points are identified in the ALMA image. At the wavelength of 1.21 mm, active regions appear as bright areas (but sunspots are dark), while prominences on the disc and coronal holes are not discernible from the quiet Sun background, despite having slightly less intensity than surrounding quiet Sun regions. Magnetic inversion lines appear as large, elongated dark structures and coronal bright points correspond to ALMA bright points. Pracoviště Astronomický ústav Kontakt Radka Svašková, bibl@asu.cas.cz, Tel.: 323 620 326 Rok sběru 2019
Počet záznamů: 1