WD1032+011, an inflated brown dwarf in an old eclipsing binary with a white dwarf

Abstract

We present the discovery of only the third brown dwarf known to eclipse a non-accreting white dwarf. Gaia parallax information and multi-colour photometry confirm that the white dwarf is cool (9950$\pm$150K) and has a low mass (0.45$\pm$0.05~MSun), and spectra and lightcurves suggest the brown dwarf has a mass of 0.067 $\pm$0.006 MSun (70 MJup) and a spectral type of L5 $\pm$1. The kinematics of the system show that the binary is likely to be a member of the thick disk and therefore at least 5 Gyr old. The high cadence lightcurves show that the brown dwarf is inflated, making it the first brown dwarf in an eclipsing white dwarf-brown dwarf binary to be so.

arXiv commentAccepted for publication in MNRAS, 11 pages, 7 Figures

References in corpus (42)

• emcee: The MCMC Hammer
• Gaia Data Release 2. Summary of the contents and survey properties
• Measuring Reddening with SDSS Stellar Spectra and Recalibrating SFD
• The K2 Mission: Characterization and Early results
• Evolutionary models for cool brown dwarfs and extrasolar giant planets. The case of HD 20945
• Exploring the Milky Way stellar disk. A detailed elemental abundance study of 714 F and G dwarf stars in the Solar neighbourhood
• A Method of Correcting Near-Infrared Spectra for Telluric Absorption
• The Infrared Telescope Facility (IRTF) Spectral Library: Cool Stars
• Automated data reduction workflows for astronomy
• An Infrared Spectroscopic Sequence of M, L and T Dwarfs
• The Hawaii Infrared Parallax Program. I. Ultracool Binaries and the L/T Transition
• An Improved Spectroscopic Analysis of DA White Dwarfs from the Sloan Digital Sky Survey Data Release 4
• A Catalog of Spectroscopically Confirmed White Dwarfs from the Sloan Digital Sky Survey Data Release 4
• ULTRACAM: an ultra-fast, triple-beam CCD camera for high-speed astrophysics
• The birth of the Milky Way as uncovered by accurate stellar ages with Gaia
• Physical properties of IP Pegasi: an eclipsing dwarf nova with an unusually cool white dwarf
• A Comparative Study of the Mass Distribution of Extreme Ultraviolet-Selected White Dwarfs
• The scatter of the M dwarf mass-radius relationship
• Transiting exoplanets from the CoRoT space mission. XV. CoRoT-15b: a brown dwarf transiting companion
• Spitzer Phase Curves of KELT-1b and the Signatures of Nightside Clouds in Thermal Phase Observations
• Age Determination in Upper Scorpius with Eclipsing Binaries
• White dwarfs in the UKIDSS Large Area Survey: The Substellar Companion Fraction
• Transiting exoplanets from the CoRoT space mission XXVIII. CoRoT-33b, an object in the brown dwarf desert with 2:3 commensurability with its host star
• Binaries discovered by the MUCHFUSS project SDSS J08205+0008 - An eclipsing subdwarf B binary with brown dwarf companion
• Limb-Darkening Coefficients for Eclipsing White Dwarfs
• EPIC 219388192 b - an inhabitant of the brown dwarf desert in the Ruprecht 147 open cluster
• Two white dwarfs in ultrashort binaries with detached, eclipsing, likely substellar companions detected by K2
• The substellar companion in the eclipsing white dwarf binary SDSS J141126.20+200911.1
• Binaries discovered by the MUCHFUSS project: SDSS J162256.66$+$473051.1 - An eclipsing subdwarf B binary with a brown dwarf companion
• NGTS-7Ab: An ultra-short period brown dwarf transiting a tidally-locked and active M dwarf
• The Age of the Galactic Stellar Halo from Gaia White Dwarfs
• Two intermediate-mass transiting brown dwarfs from the TESS mission
• Multiwaveband photometry of the irradiated brown dwarf WD0137-349B
• SOPHIE velocimetry of Kepler transit candidates. XIII. KOI-189 B and KOI-686 B: two very low-mass stars in long-period orbits
• TOI-503: The first known brown dwarf-Am star binary from the TESS mission
• The eclipsing post-common envelope binary CSS21055: a white dwarf with a probable brown-dwarf companion
• An Eclipsing Substellar Binary in a Young Triple System discovered by SPECULOOS
• An eclipsing post common-envelope system consisting of a pulsating hot subdwarf B star and a brown dwarf companion
• Emission lines in the atmosphere of the irradiated brown dwarf WD0137-349B
• SDSS J000555.90-100213.5: a hot, magnetic carbon-atmosphere WD rotating with a 2.1 day period
• The direct detection of the irradiated brown dwarf in the white dwarf - brown dwarf binary SDSS J141126.20+200911.1
• Signs of accretion in the white dwarf + brown dwarf binary NLTT5306

Cited by in corpus (31)

• Close detached white dwarf + brown dwarf binaries: further evidence for low values of the common envelope efficiency
• A Catalogue of Potential Post Common Envelope Binaries
• A quantitative in-depth analysis of the prototype sdB+BD system SDSS J08205+0008 revisited in the Gaia era
• Magnetic white dwarfs in post-common-envelope binaries
• NLTT5306B: an inflated, weakly irradiated brown dwarf
• A transiting brown dwarf in a 2 hour orbit
• Eclipsing White Dwarf Binaries in Gaia and the Zwicky Transient Facility
• Photometric follow-up of 43 new eclipsing white dwarf plus main-sequence binaries from the ZTF survey
• Hydrodynamics and survivability during post-main-sequence planetary engulfment
• Four new deeply-eclipsing white dwarfs in ZTF
• Exploring deep and hot adiabats as a potential solution to the radius inflation problem in brown dwarfs: Long-timescale models of the deep atmospheres of KELT-1b, Kepler-13Ab, and SDSS1411B
• Mapping the pressure-dependent day-night temperature contrast of a strongly irradiated atmosphere with HST spectroscopic phase curve
• Gemini/GMOS Transmission Spectroscopy of the Grazing Planet Candidate WD 1856+534 b
• Disk or Companion: Characterizing Excess Infrared Flux in Seven White Dwarf Systems with Near-Infrared Spectroscopy
• Random Forest classification of Gaia DR3 white dwarf-main sequence spectra: a feasibility study
• Minimum Orbital Periods of H-Rich Bodies
• Hotter Than Expected: HST/WFC3 Phase-resolved Spectroscopy of a Rare Irradiated Brown Dwarf with Strong Internal Heat Flux
• Relative astrometry in an annular field
• When the anomalistic, draconitic and sidereal orbital periods do not coincide: the impact of post-Keplerian perturbing accelerations
• The Impact of Irradiation on the Radius and Thermal Evolution of Transiting Brown Dwarfs
• Two substellar survivor candidates; one found and one missing
• ZTFJ0038+2030: a long period eclipsing white dwarf and a substellar companion
• Measurement of stellar and substellar winds using white dwarf hosts
• The Sonora Brown Dwarf Atmosphere and Evolution Models I. Model Description and Application to Cloudless Atmospheres in Rainout Chemical Equilibrium
• An irradiated-Jupiter analogue hotter than the Sun
• Near-infrared spectra of the inflated post-common envelope brown dwarf NLTT 5306B
• PHL 5038AB: Is the brown dwarf causing pollution of its white dwarf host star?
• Searching for white dwarf variables in TESS data
• Fates of the sub-stellar objects (FOSSO) I. Fates of the known brown dwarfs in main-sequence--BD binaries
• Phase-resolved Hubble Space Telescope WFC3 Spectroscopy of Weakly-Irradiated Brown Dwarf GD 1400 and Energy Redistribution-Irradiation Trends in Six WD$-$BD Binaries
• Atmospheric Signatures of Common Envelope Evolution in White Dwarf Planets