NASA NTRS · 20210014313
Heavy-metal Abundances in DO-type White Dwarfs
Abstract
Spectral lines of a variety of trans-iron elements were identified in high-resolution ultraviolet spectra of DO-type white dwarfs. Abundance determinations by means of non-local thermodynamic equilibrium stellar-atmosphere techniques have shown that, without exception, their abundances are unexpectedly strong supersolar, much higher than predicted by asymptotic-giant-branch nucleosynthesis calculations. We present our analyses and discuss the photospheric trans-iron element prominence.
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Thomas Rauch, Jeffrey Walter Kruk, Sebastién Gamrath, Pascal Quinet, Denny Hoyer, Klaus Werner. Heavy-metal Abundances in DO-type White Dwarfs. https://ntrs.nasa.gov/citations/20210014313
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