Document Type
Article
Publication Date
11-1-2007
Description
We report on neon abundances derived from Spitzer high resolution spectral data of eight Wolf-Rayet (WR) stars using the forbidden line of [Ne III] 15.56 μm. Our targets include four WN stars of subtypes 4–7, and four WC stars of subtypes 4–7. We derive ion fraction abundances γ of Ne2+ for the winds of each star. The ion fraction abundance is a product of the ionization fraction Qi in stage i and the abundance by number AE of element E relative to all nuclei. Values generally consistent with solar are obtained for the WN stars, and values in excess of solar are obtained for the WC stars.
Citation Information
Ignace, Richard; Cassinelli, J.; Tracy, G.; Churchwell, E.; and Lamers, H. J.. 2007. Neon Abundances from a Spitzer/IRS Survey of Wolf-Rayet Stars.. The Astrophysical Journal. Vol.669 ISSN: 2041-8205