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Fig. 5


Position of the PG 1159 stars, O(He) stars, and hot DOs analyzed in this paper in the gTeff diagram (open symbols). Full symbols denote previously analyzed hot and cool DOs as well as PG 1159 and O(He) stars. Evolutionary tracks for H-deficient WDs (Althaus et al. 2009) are labeled with the respective stellar mass in M. Also shown is one of the theoretical wind limits from Unglaub & Bues (2000) near which PG 1159 stars transform into DOs because gravitational settling overcomes radiation-driven mass loss.

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