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Paper: Lyman Line Spectroscopy of Hot Hydrogen-Rich White Dwarfs Revisited
Volume: 334, 14th European Workshop on White Dwarfs
Page: 185
Authors: Vennes, S.; Chayer, P.; Dupuis, J.; Lanz, T.
Abstract: We present a study of 40 hot DA white dwarfs observed with the Far Ultraviolet Spectroscopic Explorer (FUSE). We measured the effective temperatures and surface gravities using a grid of pure-hydrogen model atmospheres in local thermodynamic equilibrium (LTE). Systematic differences with similar measurements based on Balmer line spectroscopy are in part due to non-LTE departure in the hydrogen atom, but for the most part they are due to the presence of heavy-elements in many white dwarf atmospheres throughout the range of effective temperatures covered in our sample.
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