SIMBAD references

2023MNRAS.525.1814M - Mon. Not. R. Astron. Soc., 525, 1814-1823 (2023/October-3)

An eclipsing 47 min double white dwarf binary at 400 pc.

MUNDAY J., TREMBLAY P.-E., HERMES J.J., BARLOW B., PELISOLI I., MARSH T.R., PARSONS S.G., JONES D., KEPLER S.O., BROWN A., LITTLEFAIR S.P., HEGEDUS R., BARAN A., BREEDT E., DHILLON V.S., DYER M.J., GREEN M.J., KENNEDY M.R., KERRY P., LOPEZ I.D., ROMERO A.D., SAHMAN D. and WORTERS H.L.

Abstract (from CDS):

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 multiband ULTRACAM photometry which indicate a primary DA WD of mass $0.40\pm 0.04\, \text{M}_\odot$ and a $0.28\pm 0.02\, \text{M}_\odot$ 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 yr to a precision of better than 1 per cent. The fate of the binary is to merge in approximately 41 Myr, likely forming a single, more massive WD.

Abstract Copyright: © 2023 The Author(s) Published by Oxford University Press on behalf of Royal Astronomical Society

Journal keyword(s): gravitational waves - binaries: close - stars: individual: WDJ 022558.21-692025.38 - white dwarfs

Simbad objects: 12

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