A Progress Report on the Carbon Dominated Atmosphere White Dwarfs
P. Dufour, J. Liebert, B. Swift, G. Fontaine, T. Sukhbold

TL;DR
This paper reports on new high-quality spectroscopic observations of white dwarfs with atmospheres dominated by carbon, expanding understanding of these rare stellar objects and their atmospheric compositions.
Contribution
It provides new observational data and analysis on carbon-dominated atmosphere white dwarfs, building on recent discoveries and offering insights into their properties.
Findings
Confirmation of carbon dominance in white dwarf atmospheres
Identification of spectral features indicative of atmospheric composition
Enhanced understanding of white dwarf atmospheric diversity
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.
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