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• W4385507427 abstract "We present the discovery of the eclipsing double white dwarf (WD) binary WDJ 022558.21-692025.38 that has an orbital period of 47.19 min. Following identification with the Transiting Exoplanet Survey Satellite, we obtained time-series ground based spectroscopy and high-speed multi-band ULTRACAM photometry which indicate a primary DA WD of mass 0.40 +- 0.04 Msol and a 0.28 +- 0.02 Msol mass secondary WD, which is likely of type DA as well. The system becomes the third-closest eclipsing double WD binary discovered with a distance of approximately 400 pc and will be a detectable source for upcoming gravitational wave detectors in the mHz frequency range. Its orbital decay will be measurable photometrically within 10 yrs to a precision of better than 1%. The fate of the binary is to merge in approximately 41 Myr, likely forming a single, more massive WD." @default.
• W4385507427 created "2023-08-03" @default.
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• W4385507427 date "2023-07-31" @default.
• W4385507427 modified "2023-10-18" @default.
• W4385507427 title "An Eclipsing 47 minute Double White Dwarf Binary at 400 pc" @default.
• W4385507427 doi "https://doi.org/10.48550/arxiv.2308.00036" @default.
• W4385507427 hasPublicationYear "2023" @default.
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