LESIA - Observatoire de Paris

2D multi-thread modeling of prominence fine structures - models and recent results.

Wednesday 24 November 2010, by Stanislav Gunar (Astronomical Institute, Academy of Sciences, Czech Republic)

Tuesday 30 November 2010 à 11h00 , Lieu : Salle de conférence du bât. 17

The modeling of quiescent prominences provides us with a useful tool for understanding of these complex and beautiful solar features. We employ a state-of-the-art 2D multi-thread models to describe the prominence fine structures in the form of vertical 2D threads suspended in a dipped horizontal magnetic field in a magneto-hydrostatic equilibrium. The temperature structure of these threads includes the prominence-corona transition region. We consistently solve the 2D non-LTE radiative transfer within threads to obtain the synthetic hydrogen spectra which we compare with observations. In this seminar I will briefly outline the properties of the 2D multi-thread models and present our recent results. Those include the analyses of the effect of the magnetic field orientation with respect to the LOS on the shape of the hydrogen Lyman lines, study of the Lyman line asymmetries, and statistical analyses of two observed quiescent prominences.

Co-authors: P. Heinzel, U. Anzer, B. Schmieder, P. Schwartz