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Far ultraviolet spectroscopy of hot DA white dwarfs: The case of silicon

Dupuis, J, Chayer, P, Hénault-Brunet, V, Vennes, S and Kruk, JW (2009) Far ultraviolet spectroscopy of hot DA white dwarfs: The case of silicon AIP Conference Proceedings, 1135. pp. 329-331.

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Abstract

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. © 2009 American Institute of Physics.

Item Type: Article
Authors :
NameEmailORCID
Dupuis, JUNSPECIFIEDUNSPECIFIED
Chayer, PUNSPECIFIEDUNSPECIFIED
Hénault-Brunet, VUNSPECIFIEDUNSPECIFIED
Vennes, SUNSPECIFIEDUNSPECIFIED
Kruk, JWUNSPECIFIEDUNSPECIFIED
Date : 18 December 2009
Identification Number : 10.1063/1.3154074
Depositing User : Symplectic Elements
Date Deposited : 17 May 2017 12:54
Last Modified : 17 May 2017 12:54
URI: http://epubs.surrey.ac.uk/id/eprint/837185

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