How accurately do we know the parameters of hot DA white dwarfs

Napiwotzki, R., Green, P.J. and Saffer, R. (1999) How accurately do we know the parameters of hot DA white dwarfs. In: UNSPECIFIED.

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We present new determinations of effective temperature, surface gravity, and masses for a sample of hot DA white dwarfs selected from the EUVE and ROSAT Wide Field Camera bright source lists in the course of a near-IR survey for low mass companions. Our analysis, based on hydrogen NLTE model atmospheres, provides a map of LTE correction vectors, which allow a thorough comparision with previous LTE studies.We find previous analyses underestimate both the systematic errors and the observational scatter in the determination of white dwarf parameters via fits to model atmospheres.

Item Type	Conference or Workshop Item (Other)
Additional information	Original paper can be found at: http://www.astrosociety.org/pubs/cs/156-194.html--Copyright Astronomical Society of the Pacific
Date Deposited	15 May 2025 16:18
Last Modified	25 Feb 2026 00:06