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A Circumbinary Debris Disk in a Polluted White Dwarf System
J. Farihi, S. G. Parsons, B. T. Gänsicke
Planetary systems commonly survive the evolution of single stars, as evidenced by terrestrial-like planetesimal debris observed orbiting and polluting the surfaces of white dwarfs.…
Polarimetric evidence of a white dwarf pulsar in the binary system AR Scorpii
D. A. H. Buckley, P. J. Meintjes, S. B. Potter +2
The variable star AR Sco was recently discovered to pulse in brightness every 1.97 min from ultraviolet wavelengths into the radio regime. The system is composed of a cool, low-mas…
Close binary progenitors and ejected companions of thermonuclear supernovae
S. Geier, T. Kupfer, U. Heber +8
Hot subdwarf stars (sdO/Bs) are evolved core helium-burning stars with very thin hydrogen envelopes, which can be formed by common envelope ejection. Close sdB binaries with massiv…
The population of hot subdwarf stars studied with Gaia I. The catalogue of known hot subdwarf stars
S. Geier, R. H. Østensen, P. Nemeth +5
In preparation for the upcoming all-sky data releases of the Gaia mission we compiled a catalogue of known hot subdwarf stars and candidates drawn from the literature and yet unpub…
Orbital periods and component masses of three double white dwarfs
A. Rebassa-Mansergas, S. G. Parsons, E. Garcia-Berro +4
The merger of close double white dwarfs (CDWDs) is one of the favourite evolutionary channels for producing Type Ia supernovae (SN Ia). Unfortunately, current theories of the evolu…
The Gaia DR1 Mass-Radius Relation for White Dwarfs
P. -E. Tremblay, N. Gentile-Fusillo, R. Raddi +8
The Gaia Data Release 1 (DR1) sample of white dwarf parallaxes is presented, including 6 directly observed degenerates and 46 white dwarfs in wide binaries. This data set is combin…