We continue our comprehensive theoretical investigation of the spectral evolution of white dwarfs based on sophisticated simulations of element transport. In this paper, we focus on the transformation of PG 1159 stars into DO/DB white dwarfs due to the gravitational settling of heavy elements, and then into DQ white dwarfs through the convective dredge-up of carbon. We study the impact of several physical parameters on the evolution of the surface carbon abundance over a wide range of effective temperature. In the hot PG 1159 and DO phases, our calculations confirm that the temperature of the PG 1159-to-DO transition depends sensitively on the stellar mass and the wind mass-loss rate. We show that measured carbon abundances of DOZ white dwa...
We present full evolutionary calculations appropriate for the study of hot hydrogen-deficient DO whi...
Context. Recent studies of the atmospheres of carbon-rich (DQ) white dwarfs have demonstrated the ex...
The convective dredge-up of carbon from the interiors of hydrogen-deficient white dwarfs has long be...
We present the first full evolutionary calculations aimed at exploring the origin of hot DQ white dw...
We present the first full evolutionary calculations aimed at exploring the origin of hot DQ white dw...
White dwarfs represent the endpoint of stellar evolution for stars with initial masses between appro...
Cool white dwarfs with Teff < 6000 K are the remnants of the oldest stars that existed in our Galaxy...
We present full evolutionary calculations appropriate for the study of hot hydrogen-deficient DO whi...
Atmospheric parameters for hot DB (helium atmosphere) white dwarfs near effective temperatures of 25...
We present full evolutionary calculations appropriate for the study of hot hydrogen-deficient DO whi...
Atmospheric parameters for hot DB (helium atmosphere) white dwarfs near effective temperatures of 25...
Atmospheric parameters for hot DB (helium atmosphere) white dwarfs near effective temperatures of 25...
We present full evolutionary calculations appropriate for the study of hot hydrogen-deficient DO whi...
Context.DQ white dwarfs show atomic or molecular carbon features in their spectra. The atmosphere c...
We present full evolutionary calculations appropriate for the study of hot hydrogen-deficient DO whi...
We present full evolutionary calculations appropriate for the study of hot hydrogen-deficient DO whi...
Context. Recent studies of the atmospheres of carbon-rich (DQ) white dwarfs have demonstrated the ex...
The convective dredge-up of carbon from the interiors of hydrogen-deficient white dwarfs has long be...
We present the first full evolutionary calculations aimed at exploring the origin of hot DQ white dw...
We present the first full evolutionary calculations aimed at exploring the origin of hot DQ white dw...
White dwarfs represent the endpoint of stellar evolution for stars with initial masses between appro...
Cool white dwarfs with Teff < 6000 K are the remnants of the oldest stars that existed in our Galaxy...
We present full evolutionary calculations appropriate for the study of hot hydrogen-deficient DO whi...
Atmospheric parameters for hot DB (helium atmosphere) white dwarfs near effective temperatures of 25...
We present full evolutionary calculations appropriate for the study of hot hydrogen-deficient DO whi...
Atmospheric parameters for hot DB (helium atmosphere) white dwarfs near effective temperatures of 25...
Atmospheric parameters for hot DB (helium atmosphere) white dwarfs near effective temperatures of 25...
We present full evolutionary calculations appropriate for the study of hot hydrogen-deficient DO whi...
Context.DQ white dwarfs show atomic or molecular carbon features in their spectra. The atmosphere c...
We present full evolutionary calculations appropriate for the study of hot hydrogen-deficient DO whi...
We present full evolutionary calculations appropriate for the study of hot hydrogen-deficient DO whi...
Context. Recent studies of the atmospheres of carbon-rich (DQ) white dwarfs have demonstrated the ex...
The convective dredge-up of carbon from the interiors of hydrogen-deficient white dwarfs has long be...