Five New Post-Main-Sequence Debris Disks with Gaseous Emission

Abstract

Observations of debris disks, the products of the collisional evolution of rocky planetesimals, can be used to trace planetary activity across a wide range of stellar types. The most common end points of stellar evolution are no exception as debris disks have been observed around several dozen white dwarf stars. But instead of planetary formation, post-main-sequence debris disks are a signpost of planetary destruction, resulting in compact debris disks from the tidal disruption of remnant planetesimals. In this work, we present the discovery of five new debris disks around white dwarf stars with gaseous debris in emission. All five systems exhibit excess infrared radiation from dusty debris, emission lines from gaseous debris, and atmospheric absorption features indicating on-going accretion of metal-rich debris. In four of the systems, we detect multiple metal species in emission, some of which occur at strengths and transitions previously unseen in debris disks around white dwarf stars. Our first year of spectroscopic follow-up hints at strong variability in the emission lines that can be studied in the future, expanding the range of phenomena these post-main-sequence debris disks exhibit.

arXiv commentAccepted to ApJ, 22 pages, 14 figures. This replacement includes correction to erroneous systemic velocity values given in Table 1

References in corpus (69)

• Astropy: A Community Python Package for Astronomy
• The Infrared Array Camera (IRAC) for the Spitzer Space Telescope
• Evolutionary models for very-low-mass stars and brown dwarfs with dusty atmospheres
• X-shooter, the new wide band intermediate resolution spectrograph at the ESO Very Large Telescope
• The Tenth Data Release of the Sloan Digital Sky Survey: First Spectroscopic Data from the SDSS-III Apache Point Observatory Galactic Evolution Experiment
• Molecfit: A general tool for telluric absorption correction. I. Method and application to ESO instruments
• A Tidally-Disrupted Asteroid Around the White Dwarf G29-38
• Molecfit: A general tool for telluric absorption correction II. Quantitative evaluation on ESO-VLT X-Shooter spectra
• A disintegrating minor planet transiting a white dwarf
• The frequency of planetary debris around young white dwarfs
• The UKIRT Wide Field Camera ZYJHK Photometric System: Calibration from 2MASS
• A $Gaia$ Data Release 2 catalogue of white dwarfs and a comparison with SDSS
• SkyMapper Southern Survey: First Data Release (DR1)
• A gaseous metal disk around a white dwarf
• The Structure of the Local Interstellar Medium V: Electron Densities
• Debris Disks: Structure, Composition, and Variability
• Circumstellar Debris and Pollution at White Dwarf Stars
• The Mauna Kea Observatories Near-Infrared Filter Set. I: Defining Optimal 1-5 $\mu$m Bandpasses
• The Dust cloud around the White Dwarf G 29-38
• Formation of planetary debris discs around white dwarfs I: Tidal disruption of an extremely eccentric asteroid
• A Dusty Disk Around GD 362, a White Dwarf With a Uniquely High Photospheric Metal Abundance
• A planetesimal orbiting within the debris disc around a white dwarf star
• Debris Disks Around White Dwarfs: The DAZ Connection
• JHK Observations of Faint Standard Stars in the Mauna Kea Near-Infrared Photometric System
• Accretion of a giant planet onto a white dwarf
• The New Class of Dusty DAZ White Dwarfs
• A White Dwarf catalogue from Gaia-DR2 and the Virtual Observatory
• The frequency and infrared brightness of circumstellar discs at white dwarfs
• Echoes of a decaying planetary system: the gaseous and dusty disks surrounding three white dwarfs
• Excess Infrared Radiation from a Massive DAZ White Dwarf: GD362 - a Debris Disk?
• SDSSJ104341.53+085558.2: A second white dwarf with a gaseous debris disc
• Evolution of OH and CO-dark Molecular Gas Fraction Across a Molecular Cloud Boundary In Taurus
• SDSSJ084539.17+225728.0: the first DBZ white dwarf with a metal-rich gaseous debris disc
• Infrared Emission from the Dusty Disk Orbiting GD 362, An Externally-Polluted White Dwarf
• Doppler-imaging of the planetary debris disc at the white dwarf SDSS J122859.93+104032.9
• A White Dwarf with Transiting Circumstellar Material Far Outside the Roche Limit
• Signs of a faint disc population at polluted white dwarfs
• Variable Emission from a Gaseous Disc around a Metal-Polluted White Dwarf
• Compositions of Planetary Debris around Dusty White Dwarfs
• Near-infrared photometry of Y dwarfs: low ammonia abundance and the onset of water clouds
• Interpretation and diversity of exoplanetary material orbiting white dwarfs
• The frequency of gaseous debris discs around white dwarfs
• The Drop during Less than 300 days of a Dusty White Dwarf's Infrared Luminosity
• Tidal disruption of planetary bodies by white dwarfs II: Debris disc structure and ejected interstellar asteroids
• Infrared observations of white dwarfs and the implications for the accretion of dusty planetary material
• Spectroscopic Evolution of Disintegrating Planetesimals: Minutes to Months Variability in the Circumstellar Gas Associated with WD 1145+017
• Rapid Evolution of the Gaseous Exoplanetary Debris Around the White Dwarf Star HE 1349--2305
• Infrared-excess white dwarfs in the Gaia 100 pc sample
• Dust Production and Depletion in Evolved Planetary Systems
• Most white dwarfs with detectable dust discs show infrared variability
• Evidence for eccentric, precessing gaseous debris in the circumstellar absorption towards WD 1145+017
• Infrared Excesses around Bright White Dwarfs from Gaia and unWISE I
• Extreme Debris Disk Variability -- Exploring the Diverse Outcomes of Large Asteroid Impacts During the Era of Terrestrial Planet Formation
• Another one grinds the dust: Variability of the planetary debris disc at the white dwarf SDSS J104341.53+085558.2
• The dust never settles: collisional production of gas and dust in evolved planetary systems
• Infrared Variability of Two Dusty White Dwarfs
• Dusty WDs in the $WISE$ All Sky Survey $\cap$ SDSS
• Magnetism, X-rays, and Accretion Rates in WD 1145+017 and other Polluted White Dwarf Systems
• Modeling of the Variable Circumstellar Absorption Features of WD 1145+017
• Emission lines in the atmosphere of the irradiated brown dwarf WD0137-349B
• A Word to the WISE: Confusion is Unavoidable for WISE-selected Infrared Excesses
• Fast and Slow Precession of Gaseous Debris Disks Around Planet-Accreting White Dwarfs
• Non-LTE models for the gaseous metal component of circumstellar discs around white dwarfs
• A new weak-field magnetic DA white dwarf in the local 20 pc volume. The frequency of magnetic fields in DA stars
• WIRED for EC: New White Dwarfs with $\text{WISE}$ Infrared Excesses and New Classification Schemes from the Edinburgh-Cape Blue Object Survey
• A Gravitational Redshift Determination of the Mean Mass of White Dwarfs. DBA and DB Stars
• Follow-up Imaging of Disk Candidates from the Disk Detective Citizen Science Project: New Discoveries and False-Positives in WISE Circumstellar Disk Surveys
• The gaseous debris disk of the white dwarf SDSS J1228+1040. HST/COS search for far-ultraviolet signatures
• The Effect of Unresolved Contaminant Stars on the Cross-Matching of Photometric Catalogues

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• A catalogue of white dwarfs in Gaia EDR3
• Recurring Planetary Debris Transits and Circumstellar Gas around White Dwarf ZTF J0328$-$1219
• WD 1856 b: a close giant planet around a white dwarf that could have survived a common-envelope phase
• White dwarfs with planetary remnants in the era of Gaia I: six emission line systems
• Discovery of Beryllium in White Dwarfs Polluted by Planetesimal Accretion
• Infrared Excesses around Bright White Dwarfs from Gaia and unWISE. II
• Collisions in a gas-rich white dwarf planetary debris disc
• The Geometry of the G29-38 White Dwarf Dust Disk from Radiative Transfer Modeling
• How Sublimation Delays the Onset of Dusty Debris Disk Formation Around White Dwarf Stars
• On the role of resonances in polluting white dwarfs by asteroids
• Formation of eccentric gas discs from sublimating or partially disrupted asteroids orbiting white dwarfs
• The entry geometry and velocity of planetary debris into the Roche sphere of a white dwarf
• Probing the eccentricity in protostellar discs -- Modeling kinematics and morphologies
• Astrometric Gravitational-Wave Detection via Stellar Interferometry
• 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
• Disentangling the parameter space: The role of planet multiplicity in triggering dynamical instabilities on planetary systems around white dwarfs
• Velocity-imaging the rapidly precessing planetary disc around the white dwarf HE 1349-2305 using Doppler tomography
• Rapid destruction of planetary debris around white dwarfs through aeolian erosion
• Serendipitous discovery of a dusty disc around WDJ181417.84-735459.83
• First detection of a disk free of volatile elements around a young A-type star: A sign of collisions between rocky planets?
• Planetesimals drifting through dusty and gaseous white dwarf debris discs: Types I, II and III-like migration
• Characterizing planetary material accreted by cool helium atmosphere white dwarfs using an exponentially decaying disc model
• Origin of Ca II emission around polluted white dwarfs
• The nature of ASASSN-24fw's occultation: modelling the event as dimming by optically thick rings around a sub-stellar companion
• Atmospheric Signatures of Common Envelope Evolution in White Dwarf Planets
• Modeling Circumstellar Gas Emission around a White Dwarf Using Cloudy