2D non-LTE radiative modelling of He I spectral lines formed in solar prominences

Context. The interpretation of high-resolution spectropolarimetric observations of solar prominences completed primarily at visible and near-infrared wavelengths, requires radiative modelling that takes into account both multi-dimensional geometry and complex atomic models. Aims. We enhance the interpretation of observations of He i multiplets, by considering 2D non-LTE unpolarized radiation transfer, and taking into account of the atomic fine-structure of helium. Methods. We apply our 2D non-LTE radiative transfer code, which is based on the multi-grid Gauss-Seidel/SOR iterative schemes. Results. It allows us to compute realistic emergent intensity profiles for the He i λ10 830 A and D3 multiplets, which can be directly compared to the simultaneous and high-resolution observations completed at THeMIS. A preliminary 2D multi-thread modelling is also discussed.

• Publication year

  2008

• Venue

  Astronomy and Astrophysics

• Publication date

  2008-11-28

• Fields of study

  Physics

• Identifiers
  DOI 10.1051/0004-6361/200810296arXiv 0811.4753
• External record

  Open on Semantic Scholar

• Source metadata

  Semantic Scholar

• No claims are published for this paper.

• No concepts are published for this paper.

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