Munday, James; Tremblay, P. -E.; Hermes, J. J.; Barlow, Brad; Pelisoli, Ingrid; Marsh, T. R.; Parsons, Steven G.; Jones, David; Kepler, S. O.; Brown, Alex; Littlefair, S. P.; Hegedus, R.; Baran, Andrzej; Breedt, Elmé; Dhillon, V. S.; Dyer, Martin J.; Green, Matthew J.; Kennedy, Mark R.; Kerry, Paul; Lopez, Isaac D.; Romero, Alejandra D.; Sahman, Dave; Worters, Hannah L.
Bibliographical reference
Monthly Notices of the Royal Astronomical Society
Advertised on:
10
2023
Citations
5
Refereed citations
3
Description
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.
Related projects
Physics of Ionized Nebulae
The research that is being carried out by the group can be condensed into two main lines: 1) Study of the structure, dynamics, physical conditions and chemical evolution of Galactic and extragalactic ionized nebulae through detailed analysis and modelization of their spectra. Investigation of chemical composition gradients along the disk of our
Jorge
García Rojas
Black holes, neutron stars, white dwarfs and their local environment
Accreting black-holes and neutron stars in X-ray binaries provide an ideal laboratory for exploring the physics of compact objects, yielding not only confirmation of the existence of stellar mass black holes via dynamical mass measurements, but also the best opportunity for probing high-gravity environments and the physics of accretion; the most
Montserrat
Armas Padilla