A Progress Report on the Carbon Dominated Atmosphere White Dwarfs

Abstract

Recently, Dufour et al. (2007) reported the unexpected discovery that a few white dwarfs found in the Sloan Digital Sky Survey had an atmosphere dominated by carbon with little or no trace of hydrogen and helium. Here we present a progress report on these new objects based on new high signal-to-noise follow-up spectroscopic observations obtained at the 6.5m MMT telescope on Mount Hopkins, Arizona.

6 pages, 2 figures, to appear in Journal of Physics Conference Proceedings for the 16th European White Dwarf Workshop

References in corpus (7)

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• The Element Abundances in Bare Planetary Nebula Central Stars and the Shell Burning in AGB Stars
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Cited by in corpus (6)

• Evolutionary and pulsational properties of white dwarf stars
• A New Small-Amplitude Variable Hot DQ White Dwarf
• Stark Broadening of Carbon and Oxygen Lines in Hot DQ White Dwarf Stars: Recent Results and Applications
• Follow-up Studies of the Pulsating Magnetic White Dwarf SDSS J142625.71+575218.3
• Follow-up Observations of the Second and Third Known Pulsating Hot DQ White Dwarfs
• Hot C-rich white dwarfs: testing the DB-DQ transition through pulsations