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Stellar archaeology with Gaia: the Galactic white dwarf population
Boris Gaensicke, Pier-Emmanuel Tremblay, Martin Barstow +23
Gaia will identify several 1e5 white dwarfs, most of which will be in the solar neighborhood at distances of a few hundred parsecs. Ground-based optical follow-up spectroscopy of t…
The Composition Of A Disrupted Extrasolar Planetesimal At SDSS J0845+2257 (Ton 345)
David J. Wilson, Boris T. Gaensicke, Detlev Koester +4
We present a detailed study of the metal-polluted DB white dwarf SDSS J0845+2257 (Ton 345). Using high-resolution HST/COS and VLT spectroscopy, we have detected hydrogen and eleven…
Formation of planetary debris discs around white dwarfs II: Shrinking extremely eccentric collisionless rings
Dimitri Veras, Zoe M. Leinhardt, Siegfried Eggl +1
The formation channel of the tens of compact debris discs which orbit white dwarfs (WDs) at a distance of one Solar radius remains unknown. Asteroids that survive the giant branch…
The orbital evolution of asteroids, pebbles and planets from giant branch stellar radiation and winds
Dimitri Veras, Siegfried Eggl, Boris T. Gaensicke
The discovery of over 50 planets around evolved stars and more than 35 debris discs orbiting white dwarfs highlight the increasing need to understand small body evolution around bo…
The bulk composition of exo-planets
Boris Gaensicke, John Debes, Patrick Dufour +7
Priorities in exo-planet research are rapidly moving from finding planets to characterizing their physical properties. Of key importance is their chemical composition, which feeds…
Insights into internal effects of common-envelope evolution using the extended Kepler mission
J. J. Hermes, B. T. Gaensicke, A. Bischoff-Kim +14
We present an analysis of the binary and physical parameters of a unique pulsating white dwarf with a main-sequence companion, SDSS J1136+0409, observed for more than 77 d during t…