Four new deeply-eclipsing white dwarfs in ZTF

Abstract

We present the results of a search for deeply-eclipsing white dwarfs in the ZTF Data Release 4. We identify nine deeply-eclipsing white dwarf candidates, four of which we followed up with high-cadence photometry and spectroscopy. Three of these systems show total eclipses in the ZTF data and our follow-up APO 3.5-meter telescope observations. Even though the eclipse duration is consistent with sub-stellar companions, our analysis shows that all four systems contain a white dwarf with low-mass stellar companions of ~0.1 Msol. We provide mass and radius constraints for both stars in each system based on our photometric and spectroscopic fitting. Finally, we present a list of 41 additional eclipsing WD+M candidates identified in a preliminary search of ZTF DR7, including 12 previously studied systems. We identify two new candidate short-period, eclipsing, white dwarf-brown dwarf binaries within our sample of 41 WD+M candidates based on PanSTARRS colors.

Accepted for publication with MNRAS. 12 pages, 15 figures, 3 tables

References in corpus (46)

• The Zwicky Transient Facility: System Overview, Performance, and First Results
• New evolutionary models for pre-main sequence and main sequence low-mass stars down to the hydrogen-burning limit
• The Zwicky Transient Facility: Data Processing, Products, and Archive
• A box-fitting algorithm in the search for periodic transits
• The Pan-STARRS1 Database and Data Products
• RVSAO 2.0: Digital Redshifts and Radial Velocities
• The Formation Rate, Mass and Luminosity Functions of DA White Dwarfs from the Palomar Green Survey
• A disintegrating minor planet transiting a white dwarf
• A $Gaia$ Data Release 2 catalogue of white dwarfs and a comparison with SDSS
• A catalogue of white dwarfs in Gaia EDR3
• On the Spectral Evolution of Hot White Dwarf Stars. I. A Detailed Model-Atmosphere Analysis of Hot White Dwarfs from SDSS DR12
• Limb and gravity-darkening coefficients for the TESS satellite at several metallicities, surface gravities, and microturbulent velocities
• New evolutionary sequences for extremely low mass white dwarfs: Homogeneous mass and age determinations, and asteroseismic prospects
• A Giant Planet Candidate Transiting a White Dwarf
• GU Boo: A New 0.6 Msun Detached Eclipsing Binary
• A 12 minute Orbital Period Detached White Dwarf Eclipsing Binary
• Post-common envelope binaries from SDSS - VII: A catalogue of white dwarf-main sequence binaries
• The solar-type eclipsing binary system LL Aquarii
• The scatter of the M dwarf mass-radius relationship
• A systematic search of Zwicky Transient Facility data for ultracompact binary LISA-detectable gravitational-wave sources
• I Spy Transits and Pulsations: Empirical Variability in White Dwarfs Using Gaia and the Zwicky Transient Facility
• A White Dwarf with Transiting Circumstellar Material Far Outside the Roche Limit
• 3D Model Atmospheres for Extremely Low-Mass White Dwarfs
• Discovery of the Eclipsing Detached Double White Dwarf Binary NLTT 11748
• Magnetic Inflation and Stellar Mass II: On the Radii of Single, Rapidly Rotating, Fully Convective M Dwarf Stars
• The SDSS spectroscopic catalogue of white dwarf-main sequence binaries: new identifications from DR9-12
• Precise Atmospheric Parameters for the Shortest Period Binary White Dwarfs: Gravitational Waves, Metals, and Pulsations
• Post Common Envelope Binaries from SDSS. V: Four eclipsing white dwarf main sequence binaries
• A First Look at White Dwarf - M Dwarf Pairs in the Sloan Digital Sky Survey (SDSS)
• Eclipsing Post Common Envelope Binaries from the Catalina Surveys
• Found: The Progenitors of AM CVn and Supernovae .Ia
• New Close Binary Systems from the SDSS-I (Data Release Five) and the Search for Magnetic White Dwarfs in Cataclysmic Variable Progenitor Systems
• Solution to the problem of the surface gravity distribution of cool DA white dwarfs from improved 3D model atmospheres
• Two white dwarfs in ultrashort binaries with detached, eclipsing, likely substellar companions detected by K2
• An 8.8 minute orbital period eclipsing detached double white dwarf binary
• Gravity and limb-darkening coefficients for compact stars: DA, DB, and DBA eclipsing white dwarfs
• Discovery and characterization of five new eclipsing AM CVn systems
• WD1032+011, an inflated brown dwarf in an old eclipsing binary with a white dwarf
• SDSS J1152+0248: An eclipsing double white dwarf from the Kepler K2 campaign
• The eclipsing post-common envelope binary CSS21055: a white dwarf with a probable brown-dwarf companion
• Detections and Constraints on White Dwarf Variability from Time-Series GALEX Observations
• ZTF J1901+5309: A 40.6-Minute Orbital Period Eclipsing Double White Dwarf System
• Discovery of a Detached, Eclipsing 40 min Period Double White Dwarf Binary and a Friend: Implications for He+CO White Dwarf Mergers
• Eclipsing White Dwarf Binaries in Gaia and the Zwicky Transient Facility
• Confirming new white dwarf-ultracool dwarf binary candidates
• Minimum Orbital Periods of H-Rich Bodies

Cited by in corpus (9)

• A Systematic Search for Short-period Close White Dwarf Binary Candidates Based on Gaia EDR3 Catalog and Zwicky Transient Facility Data
• The SNAD Viewer: Everything You Want to Know about Your Favorite ZTF Object
• Photometric follow-up of 43 new eclipsing white dwarf plus main-sequence binaries from the ZTF survey
• Measuring White Dwarf Variability from Sparsely Sampled Gaia DR3 Multi-Epoch Photometry
• An Eclipsing 47 minute Double White Dwarf Binary at 400 pc
• A magnitude-limited catalogue of unresolved white dwarf-main sequence binaries from Gaia DR3
• J0526+5934: a peculiar ultra-short period double white dwarf
• EPIC 206197016: A very hot white dwarf orbited by a strongly irradiated red dwarf
• Synthetic X-ray emission from white dwarf accreting planetary material