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Two New Tidally Distorted White Dwarfs
We identify two new tidally distorted white dwarfs (WDs), SDSS J174140.49+652638.7 and J211921.96-001825.8 (hereafter J1741 and J2119). Both stars are extremely low mass (ELM, <= 0.2 M-circle dot)WDs in short-period, ...
Radius Constraints From High-Speed Photometry Of 20 Low-Mass White Dwarf Binaries
We carry out high-speed photometry on 20 of the shortest-period, detached white dwarf binaries known and discover systems with eclipses, ellipsoidal variations (due to tidal deformations of the visible white dwarf), and ...
Discovery Of A New AM CVn System With The Kepler Satellite
We report the discovery of a new AM CVn system on the basis of broadband photometry obtained with the Kepler satellite supplemented by ground-based optical spectroscopy. Initially retained on Kepler target lists as a ...
HST And Optical Data Reveal White Dwarf Cooling, Spin, And Periodicities In GW Librae 3-4 Years After Outburst
Since the large amplitude 2007 outburstwhich heated its accreting, pulsatingwhite dwarf, the dwarf nova system GW Librae has been cooling to its quiescent temperature. Our Hubble Space Telescope ultraviolet spectra combined ...