Počet záznamů: 1
ALMA as a Prominence Thermometer: First Observations
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SYSNO ASEP 0556099 Druh ASEP J - Článek v odborném periodiku Zařazení RIV J - Článek v odborném periodiku Poddruh J Článek ve WOS Název ALMA as a Prominence Thermometer: First Observations Tvůrce(i) Heinzel, Petr (ASU-R) RID, ORCID
Berlicki, Arkadiusz (ASU-R) RID
Bárta, Miroslav (ASU-R) RID, ORCID
Rudawy, P. (PL)
Gunár, Stanislav (ASU-R) RID, ORCID
Labrosse, N. (GB)
Radziszewski, K. (PL)Celkový počet autorů 7 Číslo článku L29 Zdroj.dok. Astrophysical Journal Letters. - : Institute of Physics Publishing - ISSN 2041-8205
Roč. 927, č. 2 (2022)Poč.str. 7 s. Forma vydání Online - E Jazyk dok. eng - angličtina Země vyd. US - Spojené státy americké Klíč. slova ALMA ; solar prominences ; solar and stellar astrophysics Vědní obor RIV BN - Astronomie a nebeská mechanika, astrofyzika Obor OECD Astronomy (including astrophysics,space science) CEP GA19-16890S GA ČR - Grantová agentura ČR GA19-17102S GA ČR - Grantová agentura ČR GC20-09922J GA ČR - Grantová agentura ČR LM2018106 GA MŠMT - Ministerstvo školství, mládeže a tělovýchovy Způsob publikování Open access Institucionální podpora ASU-R - RVO:67985815 UT WOS 000768516500001 EID SCOPUS 85126902245 DOI 10.3847/2041-8213/ac588f Anotace We present first prominence observations obtained with Atacama Large Millimeter Array (ALMA) in Band 3 at the wavelength of 3 mm. High-resolution observations have been coaligned with the MSDP H alpha data from Wroclaw-Bialkow large coronagraph at similar spatial resolution. We analyze one particular cotemporal snapshot, first calibrating both ALMA and MSDP data and then demonstrating a reasonable correlation between both. In particular, we can see quite similar fine-structure patterns in both ALMA brightness-temperature maps and MSDP maps of H alpha intensities. Using ALMA, we intend to derive the prominence kinetic temperatures. However, having current observations only in one band, we use an independent diagnostic constraint, which is the H alpha line integrated intensity. We develop an inversion code and show that it can provide realistic temperatures for brighter parts of the prominence where one gets a unique solution, while within faint structures, such inversion is ill conditioned. In brighter parts, ALMA serves as a prominence thermometer, provided that the optical thickness in Band 3 is large enough. In order to find a relation between brightness and kinetic temperatures for a given observed H alpha intensity, we constructed an extended grid of non-LTE prominence models covering a broad range of prominence parameters. We also show the effect of the plane-of-sky filling factor on our results. Pracoviště Astronomický ústav Kontakt Radka Svašková, bibl@asu.cas.cz, Tel.: 323 620 326 Rok sběru 2023 Elektronická adresa http://hdl.handle.net/11104/0330924
Počet záznamů: 1