Physics
Scientific paper
Dec 2008
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2008agufmsh13a1509g&link_type=abstract
American Geophysical Union, Fall Meeting 2008, abstract #SH13A-1509
Physics
7507 Chromosphere, 7509 Corona, 7531 Prominence Eruptions, 7549 Ultraviolet Emissions
Scientific paper
In a previous study we developed a new technique for deriving prominence mass by observing how much coronal radiation in the Fe XII (19.5 nm) spectral line is absorbed by prominence material. In the present work we apply this method, which allows us to consider the effects of both foreground and background radiation in our calculations, to a sample of prominences absorbing in a coronal line that ionizes both H and He (lambda < 50.4 nm), and a line that ionizes only H (50.4 nm < lambda < 91.1 nm). This approach, first suggested by Kucera et al. (1998), permits the determination of the abundance ratio of neutral helium and hydrogen in the prominence. This ratio should depend on how the prominence is formed, on its current thermodynamic state, and on its dynamical evolution. Thus, it may provide useful insights into the formation and evolution of prominences.
Alexander Dave
Gilbert Henri
Kilper Gary
Kucera Therese
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