Plasma diagnostic of a solar prominence from hydrogen and helium resonance lines

Details Plasma diagnostic of a solar prominence from hydrogen and helium resonance lines Plasma diagnostic of a solar prominence from hydrogen and helium resonance lines

2006-09-23

arxiv.org/abs/astro-ph/0609643v1

Astronomy and Astrophysics

Astrophysics

2 pages, 2 color figures. Proceedings of SF2A, Semaine de l'Astrophysique Francaise, Journees de la SF2A 2006, Paris

Scientific paper

We present the first comparison of profiles of H et He resonance lines observed by SUMER with theoretical profiles computed with our non-LTE radiative transfer code. We use the H I Lyman-beta, H I Lyman-epsilon, and He I 584 A lines. Our code allows us to obtain the plasma parameters in prominences in conjunction with a multi-line, multi-element set of observations. The plasma temperature in the prominence core is ~ 8600 K and the pressure is 0.03 dyn/cm^2. The Ly-beta line is formed in a higher temperature region (more than 11000 K).

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