Volume 463, Number 2, February IV 2007
|Page(s)||737 - 743|
|Published online||23 November 2006|
Prominence fine structures in a magnetic equilibrium
III. Lyman continuum in 2D configurations
Astronomical Institute, Academy of Sciences of the Czech Republic, 25165 Ondřejov, Czech Republic e-mail: [gunar;pheinzel]@asu.cas.cz
2 Max-Planck-Institut für Astrophysik, Karl-Schwarzschild-Strasse 1, 85740 Garching, Germany e-mail: firstname.lastname@example.org
3 Astronomical Institute, Faculty of Mathematics and Physics, Charles University, Prague, Czech Republic
Accepted: 19 October 2006
Aims.We discuss the behavior of the Lyman continuum profiles studied on the grid of 2D vertical-thread models for prominence fine structures.
Methods.Multilevel non-LTE transfer calculations for a 12-level plus continuum hydrogen model atom are used.
Results.Since the Lyman continuum is formed in regions with different temperatures for different orientations between the magnetic field direction and the line-of-sight, our Lyman continuum modeling, together with additional information from Lyman lines, represents a very useful tool for the determination of the thread structure.
Conclusions.A comparison between our theoretical Lyman continuum models between 800 Å and 911 Å with the observed values shows that such a modeling can give interesting new constraints on the temperature structure in prominence threads.
Key words: Sun: prominences / radiative transfer / line: profiles
© ESO, 2007
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