Počet záznamů: 1
Improved near optimal angular quadratures for polarised radiative transfer in 3D MHD models
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SYSNO ASEP 0548082 Druh ASEP J - Článek v odborném periodiku Zařazení RIV J - Článek v odborném periodiku Poddruh J Článek ve WOS Název Improved near optimal angular quadratures for polarised radiative transfer in 3D MHD models Tvůrce(i) Jaume Bestard, J. (ES)
Štěpán, Jiří (ASU-R) RID, ORCID
Trujillo Bueno, J. (ES)Číslo článku A101 Zdroj.dok. Astronomy & Astrophysics. - : EDP Sciences - ISSN 0004-6361
Roč. 645, January (2021)Poč.str. 6 s. Forma vydání Online - E Jazyk dok. eng - angličtina Země vyd. FR - Francie Klíč. slova numerical methods ; polarization ; radiative transfer Vědní obor RIV BN - Astronomie a nebeská mechanika, astrofyzika Obor OECD Astronomy (including astrophysics,space science) CEP GA19-20632S GA ČR - Grantová agentura ČR Způsob publikování Open access s časovým embargem (01.02.2022) Institucionální podpora ASU-R - RVO:67985815 UT WOS 000613009200001 EID SCOPUS 85099877966 DOI 10.1051/0004-6361/202039424 Anotace Accurate angular quadratures are crucial for the numerical solution of three-dimensional (3D) radiative transfer problems, especially when the spectral line polarisation produced by the scattering of anisotropic radiation is included. There are two requirements for obtaining an optimal quadrature and they are difficult to satisfy simultaneously: high accuracy and short computing time. By imposing certain symmetries, we were recently able to derive a set of near optimal angular quadratures. Here, we extend our previous investigation by considering other symmetries. Moreover, we test the performance of our new quadratures by numerically solving a radiative transfer problem of resonance line polarisation in a 3D model of the solar atmosphere resulting from a magneto-hydrodynamical simulation. The new angular quadratures derived here outperform the previous ones in terms of the number of rays needed to achieve any given accuracy. Pracoviště Astronomický ústav Kontakt Radka Svašková, bibl@asu.cas.cz, Tel.: 323 620 326 Rok sběru 2022 Elektronická adresa https://doi.org/10.1051/0004-6361/202039424
Počet záznamů: 1