Computer Science
Scientific paper
May 2009
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2009aipc.1135..329d&link_type=abstract
FUTURE DIRECTIONS IN ULTRAVIOLET SPECTROSCOPY: A Conference Inspired by the Accomplishments of the Far Ultraviolet Spectroscopic
Computer Science
1
Faint Blue Stars, White Dwarfs, Degenerate Stars, Nuclei Of Planetary Nebulae, Stellar Clusters And Associations, Spectroscopy And Spectrophotometry
Scientific paper
With its unprecedented sensitivity and spectral resolution, FUSE has been a source of important data that have helped us further our knowledge and understanding of white dwarf stars. In order to illustrate the crucial contribution of FUSE to the study of white dwarfs, we present an abundance analysis of Si based on FUSE observations of 83 hydrogen-rich (DA) white dwarfs. Studying the Si abundances in the atmospheres of white dwarfs is important for understanding the mechanisms that counteract the downward diffusion of elements heavier than hydrogen. The FUSE observations show that Si is present in about 25% of white dwarfs. The Si abundances show a large scatter that is difficult to interpret in terms of a strict equilibrium between the gravitation and the radiative levitation.
Chayer Pierre
Dupuis Jean
Hénault-Brunet Vincent
Kruk Jeff W.
Vennes Stephane
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