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- W2904199865 abstract "We search for photometric variability in more than 23,000 known and candidate white dwarfs, the largest ultraviolet survey compiled for a single study of white dwarfs. We use gPhoton, a publicly available calibration/reduction pipeline, to generate time-series photometry of white dwarfs observed by GALEX. By implementing a system of weighted metrics, we select sources with variability due to pulsations and eclipses. Although GALEX observations have short baselines (< 30 min), we identify intrinsic variability in sources as faint as Gaia G = 20 mag. With our ranking algorithm, we identify 49 new variable white dwarfs (WDs) in archival GALEX observations. We detect 41 new pulsators: 37 have hydrogen-dominated atmospheres (DAVs), including one possible massive DAV, and four are helium-dominated pulsators (DBVs). We also detect eight new eclipsing systems; five are new discoveries, and three were previously known spectroscopic binaries. We perform synthetic injections of the light curve of WD 1145+017, a system with known transiting debris, to test our ability to recover similar systems. We find that the 3{sigma} maximum occurrence rate of WD 1145+017-like transiting objects is < 0.5%." @default.
- W2904199865 created "2018-12-22" @default.
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- W2904199865 date "2019-04-20" @default.
- W2904199865 modified "2023-10-01" @default.
- W2904199865 title "Detections and constraints on white dwarf variability from time-series GALEX observations" @default.
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- W2904199865 doi "https://doi.org/10.1093/mnras/stz1116" @default.
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