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  Accurate Short-Characteristics Radiative Transfer in A Numerical Tool for Astrophysical RESearch (ANTARES)

Kostogryz, N. M., Kupka, F., Piskunov, N., Fabbian, D., Krüger, D., & Gizon, L. (2021). Accurate Short-Characteristics Radiative Transfer in A Numerical Tool for Astrophysical RESearch (ANTARES). Solar Physics, 296: 46. doi:10.1007/s11207-021-01777-6.

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 Creators:
Kostogryz, Nadiia M.1, 2, Author
Kupka, Friedrich1, Author           
Piskunov, Nikolai, Author
Fabbian, Damian, Author
Krüger, Daniel 1, Author
Gizon, Laurent1, Author           
Affiliations:
1Department Solar and Stellar Interiors, Max Planck Institute for Solar System Research, Max Planck Society, ou_1832287              
2ERC Synergy Grant: Untangling the complex physical mechanisms behind our eruptive star and its twins (WHOLESUN), Max Planck Institute for Solar System Research, Max Planck Society, ou_3164812              

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 MPIS_PROJECTS: Plato
 Abstract: We aim to improve the accuracy of radiative energy transport in three-dimensional radiation hydrodynamical simulations in ANTARES (A Numerical Tool for Astrophysical RESearch). We implement in the ANTARES short-characteristics numerical schemes a modification of the Bézier interpolant solver. This method yields a smoother surface structure in simulations of solar convection and reduces the artifacts appearing due to the limited number of rays along which the integration is done. Reducing such artifacts leads to increased stability of the code. We show that our new implementation achieves a better agreement of the temperature structure and its gradient with a semi-empirical model derived from observations, as well as of synthetic spectral-line profiles with the observed solar spectrum.

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Language(s): eng - English
 Dates: 2021
 Publication Status: Published online
 Pages: -
 Publishing info: -
 Table of Contents: -
 Rev. Type: Peer
 Identifiers: DOI: 10.1007/s11207-021-01777-6
 Degree: -

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Title: Solar Physics
  Other : Sol. Phys.
Source Genre: Journal
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Publ. Info: Dordrecht, Holland : Kluwer, etc.
Pages: - Volume / Issue: 296 Sequence Number: 46 Start / End Page: - Identifier: ISSN: 0038-0938
CoNE: https://pure.mpg.de/cone/journals/resource/954925445694