The Zwicky Transient Facility has begun to discover binary systems with orbital periods that are less than 1 h. Combined with dedicated follow-up systems, which allow for high-cadence photometry of these sources, systematic confirmation and characterization of these sources are now possible. Here, we report the discovery of ZTF J190125.42+530929.5, a 40.6-min orbital period, eclipsing double white dwarf binary. Both photometric modelling and spectroscopic modelling confirm its nature, yielding an estimated inclination of I = 86.2+0.6-0.2 ° and primary and secondary effective temperatures of Teff = 28,000+500-500 and 17,600+400-400 K, respectively. This system adds to a growing list of sources for future gravitational-wave detectors and contributes to the demographic analysis of double degenerates.
Monthly Notices of the Royal Astronomical Society
- Pub Date:
- March 2020
- (stars:) binaries: eclipsing;
- (stars:) white dwarfs;
- Astrophysics - High Energy Astrophysical Phenomena;
- Astrophysics - Solar and Stellar Astrophysics