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NGC 1850 BH1 is another stripped-star binary masquerading as a black hole
Kareem El-Badry, Kevin Burdge
We show that the radial velocity-variable star in the black hole candidate NGC 1850 BH1 cannot be a normal subgiant, as was proposed, but is an overluminous…
Optical detection of the rapidly spinning white dwarf in V1460 Her
Ingrid Pelisoli, T. R. Marsh, R. P. Ashley +15
Accreting magnetic white dwarfs offer an opportunity to understand the interplay between spin-up and spin-down torques in binary systems. Monitoring of the white dwarf spin may rev…
Discovery and characterization of five new eclipsing AM CVn systems
J. van Roestel, T. Kupfer, M. J. Green +19
AM CVn systems are ultra-compact, helium-rich, accreting binaries with degenerate or semi-degenerate donors. We report the discovery of five new eclipsing AM CVn systems with orbit…
A highly magnetised and rapidly rotating white dwarf as small as the Moon
Ilaria Caiazzo, Kevin B. Burdge, James Fuller +15
White dwarfs represent the last stage of evolution of stars with mass less than about eight times that of the Sun and, like other stars, are often found in binaries. If the orbital…
A catalogue of white dwarfs in Gaia EDR3
N. P. Gentile Fusillo, P. -E. Tremblay, E. Cukanovaite +7
We present a catalogue of white dwarf candidates selected from Gaia early data release three (EDR3). We applied several selection criteria in absolute magnitude, colour, and Gaia q…
ZTFJ0038+2030: a long period eclipsing white dwarf and a substellar companion
Jan van Roestel, Thomas Kupfer, Keaton J. Bell +11
In a search for eclipsing white dwarfs using the Zwicky Transient Facility lightcurves, we identified a deep eclipsing white dwarf with a dark, substellar companion. The lack of an…