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Improved near optimal angular quadratures for polarised radiative transfer in 3D MHD models

The result's identifiers

  • Result code in IS VaVaI

    <a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F67985815%3A_____%2F21%3A00548082" target="_blank" >RIV/67985815:_____/21:00548082 - isvavai.cz</a>

  • Result on the web

    <a href="https://doi.org/10.1051/0004-6361/202039424" target="_blank" >https://doi.org/10.1051/0004-6361/202039424</a>

  • DOI - Digital Object Identifier

    <a href="http://dx.doi.org/10.1051/0004-6361/202039424" target="_blank" >10.1051/0004-6361/202039424</a>

Alternative languages

  • Result language

    angličtina

  • Original language name

    Improved near optimal angular quadratures for polarised radiative transfer in 3D MHD models

  • Original language description

    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.

  • Czech name

  • Czech description

Classification

  • Type

    J<sub>imp</sub> - Article in a specialist periodical, which is included in the Web of Science database

  • CEP classification

  • OECD FORD branch

    10308 - Astronomy (including astrophysics,space science)

Result continuities

  • Project

    <a href="/en/project/GA19-20632S" target="_blank" >GA19-20632S: Forward modeling and inversion of polarized solar spectra in multi-dimensional geometries</a><br>

  • Continuities

    I - Institucionalni podpora na dlouhodoby koncepcni rozvoj vyzkumne organizace

Others

  • Publication year

    2021

  • Confidentiality

    S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů

Data specific for result type

  • Name of the periodical

    Astronomy & Astrophysics

  • ISSN

    0004-6361

  • e-ISSN

    1432-0746

  • Volume of the periodical

    645

  • Issue of the periodical within the volume

    January

  • Country of publishing house

    FR - FRANCE

  • Number of pages

    6

  • Pages from-to

    A101

  • UT code for WoS article

    000613009200001

  • EID of the result in the Scopus database

    2-s2.0-85099877966