Spectral analysis of cool white dwarfs accreting from planetary systems: from the UV to the optical
Mark A. Hollands,
Pier-Emmanuel Tremblay,
Boris T. Gänsicke
et al.
Abstract:The accretion of planetary debris into the atmospheres of white dwarfs leads to the presence of metal lines in their spectra. Cool metal-rich white dwarfs, which left the main-sequence many Gyr ago, allow the study of the remnants of the oldest planetary systems. Despite their low effective temperatures (𝑇 eff ), a non-neglible amount of their flux is emitted in the near ultraviolet (NUV), where many overlapping metal lines can potentially be detected. We have observed three metal-rich cool white dwarfs with … Show more
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