Počet záznamů: 1
The Hanle and Zeeman Polarization Signals of the Solar Ca II 8542 angstromLine
- 1.
SYSNO ASEP 0463132 Druh ASEP J - Článek v odborném periodiku Zařazení RIV J - Článek v odborném periodiku Poddruh J Článek ve WOS Název The Hanle and Zeeman Polarization Signals of the Solar Ca II 8542 angstromLine Tvůrce(i) Štěpán, Jiří (ASU-R) RID, ORCID
Trujillo Bueno, J. (ES)Zdroj.dok. Astrophysical Journal Letters. - : Institute of Physics Publishing - ISSN 2041-8205
Roč. 826, č. 1 (2016), L10/1-L10/6Poč.str. 6 s. Forma vydání Tištěná - P Jazyk dok. eng - angličtina Země vyd. US - Spojené státy americké Klíč. slova line profiles ; polarization ; radiative transfer Vědní obor RIV BN - Astronomie a nebeská mechanika, astrofyzika CEP GA16-16861S GA ČR - Grantová agentura ČR Institucionální podpora ASU-R - RVO:67985815 UT WOS 000380739300010 EID SCOPUS 84979255183 DOI 10.3847/2041-8205/826/1/L10 Anotace We highlight the main results of a three-dimensional (3D) multilevel radiative transfer investigation about the solar disk-center polarization of the Ca-II 8542 angstrom line. First, through the use of a 3D model of the solar atmosphere, we investigate the linear polarization that occurs due to the atomic level polarization produced by the absorption and scattering of anisotropic radiation, taking into account the symmetry-breaking effects caused by its thermal, dynamic, and magnetic structure. Second, we study the contribution of the Zeeman effect to the linear and circular polarization. Finally, we show examples of the Stokes profiles produced by the joint action of the atomic level polarization and the Hanle and Zeeman effects. We find that the Zeeman effect tends to dominate the linear polarization signals only in the localized patches of opposite magnetic polarity, where the magnetic field is relatively strong and slightly inclined; outside such very localized patches, the linear polarization is often dominated by the contribution of atomic level polarization. Pracoviště Astronomický ústav Kontakt Radka Svašková, bibl@asu.cas.cz, Tel.: 323 620 326 Rok sběru 2017
Počet záznamů: 1