2D non-LTE radiative modelling of He I spectral lines formed in solar prominences
arXiv:0811.4753 · doi:10.1051/0004-6361/200810296
Abstract
The diagnosis of new high-resolution spectropolarimetric observations of solar prominences made in the visible and near-infrared mainly, requires a radiative modelling taking into account for both multi-dimensional geometry and complex atomic models. Hereafter we contribute to the improvement of the diagnosis based on the observation of He I multiplets, by considering 2D non-LTE unpolarized radiation transfer, and taking also into account the atomic fine structure of helium. It is an improvement and a direct application of the multi-grid Gauss-Seidel/SOR iterative scheme in 2D cartesian geometry developed by us. It allows us to compute realistic emergent intensity profiles for the He I 10830 A and D3 multiplets, which can be directly compared to the simultaneous and high-resolution observations made at THeMIS. A preliminary 2D multi-thread modelling is also discussed.
6 pages, 9 figures, A&A
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Cited by in corpus (9)
- Physics of Solar Prominences: II - Magnetic Structure and Dynamics
- Physics of Solar Prominences: I - Spectral Diagnostics and Non-LTE Modelling
- The European Solar Telescope
- EUV lines observed with EIS/Hinode in a solar prominence
- 1.5D NLTE spectral synthesis of a 3D filament/prominence simulation
- Radiative transfer in cylindrical threads with incident radiation VII. Multi-thread models
- Inference of magnetic fields in inhomogeneous prominences
- Magnetic field vector ambiguity resolution in a quiescent prominence observed on two consecutive days
- Spectral Characteristics of the He I D3 Line in a Quiescent Prominence Observed by THEMIS