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  • About
  • The Global ETD Search service is a free service for researchers to find electronic theses and dissertations. This service is provided by the Networked Digital Library of Theses and Dissertations.
    Our metadata is collected from universities around the world. If you manage a university/consortium/country archive and want to be added, details can be found on the NDLTD website.
1

Neon Abundances from a Spitzer/IRS Survey of Wolf-Rayet Stars.

Ignace, Richard, Cassinelli, J., Tracy, G., Churchwell, E., Lamers, H. J. 01 November 2007 (has links) (PDF)
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.
2

High-Dispersion IR Spectroscopy of Mira Variables with the Spitzer IRS

Luttermoser, Donald G., Creech-Eakman, Michelle J., Gueth, Tina 01 January 2014 (has links)
Abstract available through American Astronomical Society.

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