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The OmegaWhite survey for short-period variable stars - V. Discovery of an ultracompact hot subdwarf binary with a compact companion in a 44 minute orbit
T. Kupfer, G. Ramsay, J. van Roestel +20
We report the discovery of the ultracompact hot subdwarf (sdOB) binary OW J074106.0-294811.0 with an orbital period of P min, making it the…
Fast and Luminous Transients from the Explosions of Long Lived Massive White Dwarf Merger Remnants
Jared Brooks, Josiah Schwab, Lars Bildsten +4
We study the evolution and final outcome of long-lived ( years) remnants from the merger of a He white dwarf (WD) with a more massive C/O or O/Ne WD. Using Modules f…
HD 49798: Its History of Binary Interaction and Future Evolution
Jared Brooks, Thomas Kupfer, Lars Bildsten
The bright subdwarf-O star (sdO), HD 49798, is in a 1.55 day orbit with a compact companion that is spinning at 13.2 seconds. Using the measurements of the effective temperature ($…
Accretion-Induced Collapse From Helium Star + White Dwarf Binaries
Jared Brooks, Josiah Schwab, Lars Bildsten +2
Accretion-induced collapse (AIC) occurs when an O/Ne white dwarf (WD) grows to nearly the Chandrasekhar mass (), reaching central densities that trigger electron captur…