ZTF J1901+5309: a 40.6-min orbital period eclipsing double white dwarf system. (30th March 2020)

• Record Type: Journal Article
• Authors: Coughlin, Michael W; Burdge, Kevin; Sterl Phinney, E; van Roestel, Jan; Bellm, Eric C; Dekany, Richard G; Delacroix, Alexandre; Duev, Dmitry A; Feeney, Michael; Graham, Matthew J; Kulkarni, S R; Kupfer, Thomas; Laher, Russ R; Masci, Frank J; Prince, Thomas A; Riddle, Reed; Rosnet, Philippe; Smith, Roger; Serabyn, Eugene; Walters, Richard
• Is Part Of: Monthly notices of the Royal Astronomical Society. Volume 494:Number 1(2020)
• Page Start: L91
• Page End: L96
• Publication Date: 2020-03-30
• Subjects: (stars:) binaries: eclipsing -- (stars:) white dwarfs; Astronomy -- Research -- Periodicals; Periodicals; 520.5
• DOI: 10.1093/mnrasl/slaa044
• Languages: English
• ISSNs: 1745-3933

Abstract

ABSTRACT: 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 $i = 86.2^{+0.6}_{-0.2}\, \rm deg$ and primary and secondary effective temperatures of $\textrm{{T}}_\textrm{eff} = 28\, 000^{+500}_{-500}$ and $17\, 600^{+400}_{-400}\, \mathrm{ K}$, respectively. This system adds to a growing list of sources for future gravitational-wave detectors and contributes to the demographic analysis of double degenerates.