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

N. Labrosse (1) , J.-C. Vial (2) , P. Gouttebroze (2) ((1) Institute of Mathematical , Physical Sciences , University of Wales Aberystwyth , UK , (2) Institut d'Astrophysique Spatiale , CNRS - Universite Paris Sud

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Orsay Fr)

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classification 🌌 astro-ph

keywords linesplasmacodeprofilesprominenceresonancetemperatureallows

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

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