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Using Prominence Mass Inferences in Different Coronal Lines to Obtain the He/H AbundanceIn a previous study we developed a new technique for deriving prominence mass by observing how much coronal radiation in the Fe XI1 (lambda 195) 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 (h < 504 Angstroms), and a line that ionizes only H (504 Angstroms < lambda < 911 Angstroms). This approach, first suggested by Kucera et al. (1998), permits the determination of the abundance ratio [He I]/[H I] 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.
Document ID
20090006608
Acquisition Source
Goddard Space Flight Center
Document Type
Conference Paper
Authors
Gilbert, Holly
(NASA Goddard Space Flight Center Greenbelt, MD, United States)
Kilper, Gary
(Rice Univ. Houston, TX, United States)
Alexander, David
(Rice Univ. Houston, TX, United States)
Kucera, Therese
(NASA Goddard Space Flight Center Greenbelt, MD, United States)
Date Acquired
August 24, 2013
Publication Date
December 14, 2008
Subject Category
Astrophysics
Meeting Information
Meeting: 2008 Fall AGU Conference
Location: San Francisco, CA
Country: United States
Start Date: December 14, 2008
End Date: December 20, 2008
Sponsors: American Geophysical Union
Distribution Limits
Public
Copyright
Other

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