Počet záznamů: 1
Large Impact of the Mg ii h and k Incident Radiation Change on Results of Radiative Transfer Models and the Importance of Dynamics
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SYSNO ASEP 0559809 Druh ASEP J - Článek v odborném periodiku Zařazení RIV J - Článek v odborném periodiku Poddruh J Článek ve WOS Název Large Impact of the Mg ii h and k Incident Radiation Change on Results of Radiative Transfer Models and the Importance of Dynamics Tvůrce(i) Gunár, Stanislav (ASU-R) RID, ORCID
Heinzel, Petr (ASU-R) RID, ORCID
Koza, J. (SK)
Schwartz, P. (SK)Celkový počet autorů 4 Číslo článku 133 Zdroj.dok. Astrophysical Journal - ISSN 0004-637X
Roč. 934, č. 2 (2022)Poč.str. 7 s. Forma vydání Online - E Jazyk dok. eng - angličtina Země vyd. GB - Velká Británie Klíč. slova solar prominences ; solar cycle ; solar ultraviolet emissio 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 Způsob publikování Open access Institucionální podpora ASU-R - RVO:67985815 UT WOS 000834587500001 EID SCOPUS 85135470224 DOI 10.3847/1538-4357/ac7397 Anotace We demonstrate that changes in the incident radiation in Mg ii h and k lines have a significant impact on the results of radiative transfer modeling of prominence-like plasmas. To uncover the extent of this impact and allow easy comparison, here we study two cases, one representing the minimum of the solar activity and the other corresponding to the typical conditions during solar maxima. To represent well the properties of the prominence plasma, we use the 2D non-LTE (i.e., departures from local thermodynamic equilibrium) model of prominence fine structures in both the single-thread configuration and the multithread configuration incorporating prominence dynamics. We show that in the modeled environment of prominence fine structures, the change in the central, integrated, and peak intensities of the synthetic Mg ii h and k profiles can be as large as the change in the incident radiation itself. This means that the Mg ii h and k spectra of observed prominences can be affected by tens of percent because the illumination from the solar disk can change by such a degree over the solar cycle. That makes the knowledge and use of event-specific incident radiation data very important for the diagnostics of prominences and other chromospheric and coronal structures when using Mg ii h and k spectral observations. In addition, the observed Mg ii h and k spectra are strongly influenced by the line-of-sight dynamics, as the multithread configuration of the 2D model allows us to reveal. The effect of dynamics is, unsurprisingly, most pronounced in the line widths and integrated intensities. Pracoviště Astronomický ústav Kontakt Radka Svašková, bibl@asu.cas.cz, Tel.: 323 620 326 Rok sběru 2023 Elektronická adresa https://hdl.handle.net/11104/0333339
Počet záznamů: 1