The Neon-to-Magnesium Abundance Ratio as a Tracer of the Source Region of Prominence Material

Details The Neon-to-Magnesium Abundance Ratio as a Tracer of the Source Region of Prominence Material The Neon-to-Magnesium Abundance Ratio as a Tracer of the Source Region of Prominence Material

Feb 1998

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1998apj...494..450s&link_type=abstract

Astrophysical Journal v.494, p.450

Astronomy and Astrophysics

Astronomy

10

Sun: Abundances, Sun: Corona, Sun: Magnetic Fields, Sun: Prominences

Scientific paper

A survey of all 1000 spectroheliograms in the Skylab spectroheliograph plate collection was made to identify prominences above the limb and prominence-like features. The Ne/Mg abundance ratios obtained from the measurements have been determined from relative intensities of Ne VI and Mg VI lines at 400 A of seven prominences and prominence-like features observed above the solar limb. The derived abundance ratios have values intermediate between the photosphere and corona, while none are as low as the ratio of 0.7 expected in the corona, which implies that the material found in prominences is photospheric in origin. The significance of these results for the formation of prominences is briefly discussed.

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