SDSSJ104341.53+085558.2: A second white dwarf with a gaseous debris disc

Abstract

Intermediate resolution spectroscopy of the white dwarf SDSSJ104341.53+085558.2 contains double-peaked emission lines of CaII8498,8542,8662 and identifies this object to be the second single white dwarf to be surrounded by a gaseous disc of metal-rich material, similar to the recently discovered SDSSJ1228+1040. A photospheric Magnesium abundance of 0.3 times the solar value, determined from the observed MgII4481 absorption line, implies that the white dwarf is accreting from the circumstellar material. The absence of Balmer emission lines and of photospheric HeI4471 absorption indicates that the accreted material is depleted in volatile elements and, by analogy with SDSS1228+1040, may be the result of the tidal disruption of an asteroid. Additional spectroscopy of the DAZ white dwarfs WD1337+705 and GD362 does not reveal CaII emission lines. GD362 is one of the few cool DAZ that display strong infrared flux excess, thought to be originating in a circumstellar dust disc, and its temperature is likely too low to sublimate sufficient amounts of disc material to generate detectable CaII emission. WD1337+705 is, as SDSS1228+1040 and SDSS1043+0855, moderately hot, but has the lowest Mg abundance of those three stars, suggesting a possible correlation between the photospheric Mg abundance and the equivalent width of the CaII emission triplet. Our inspection of 7360 white dwarfs from SDSS DR4 fails to unveil additional strong "metal gas disc" candidates, and implies that these objects are rather rare.

Accepted by MNRAS letters, minor changes with respect to the submitted version

References in corpus (16)

• A Tidally-Disrupted Asteroid Around the White Dwarf G29-38
• A Catalog of Spectroscopically Confirmed White Dwarfs from the Sloan Digital Sky Survey Data Release 4
• A gaseous metal disk around a white dwarf
• The Dust cloud around the White Dwarf G 29-38
• Externally-polluted white dwarfs with dust disks
• A Dusty Disk Around GD 362, a White Dwarf With a Uniquely High Photospheric Metal Abundance
• Debris Disks Around White Dwarfs: The DAZ Connection
• Carbon Deficiency in Externally-Polluted White Dwarfs: Evidence for Accretion of Asteroids
• The New Class of Dusty DAZ White Dwarfs
• The accretion-diffusion scenario for metals in cool white dwarfs
• Excess Infrared Radiation from a Massive DAZ White Dwarf: GD362 - a Debris Disk?
• A Dusty Disk Around WD1150-153: Explaining the Metals in White Dwarfs by Accretion from the Interstellar Medium versus Debris Disks
• Discovery of a Cool, Massive, and Metal-Rich DAZ White Dwarf
• Model Atmosphere Analysis of the Weakly Magnetic DZ White Dwarf G165-7
• Keck Speckle Imaging of the White Dwarf G29-38: No Brown Dwarf Companion Detected
• Gemini spectra of 12000K white dwarf stars

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• SDSSJ084539.17+225728.0: the first DBZ white dwarf with a metal-rich gaseous debris disc
• Detectable close-in planets around white dwarfs through late unpacking
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• A Trio of Metal-Rich Dust and Gas Disks Found Orbiting Candidate White Dwarfs with K-Band Excess
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• The frequency of gaseous debris discs around white dwarfs
• Does a Differentiated, Carbonate-Rich, Rocky Object Pollute the White Dwarf SDSSJ104341.53+085558.2?
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• A road-map to white dwarf pollution: Tidal disruption, eccentric grind-down, and dust accretion
• Another one grinds the dust: Variability of the planetary debris disc at the white dwarf SDSS J104341.53+085558.2
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• Near-Infrared Constraints on the Presence of Warm Dust at Metal-Rich, Helium Atmosphere White Dwarfs
• Fast and Slow Precession of Gaseous Debris Disks Around Planet-Accreting White Dwarfs
• The DODO Survey II: A Gemini Direct Imaging Search for Substellar and Planetary Mass Companions around Nearby Equatorial and Northern Hemisphere White Dwarfs
• Non-LTE models for the gaseous metal component of circumstellar discs around white dwarfs
• ALMA and Herschel Observations of the Prototype Dusty and Polluted White Dwarf G29-38
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• PEWDD: A database of white dwarfs enriched by exo-planetary material
• WIRED for EC: New White Dwarfs with $\text{WISE}$ Infrared Excesses and New Classification Schemes from the Edinburgh-Cape Blue Object Survey
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• Multi-wavelength observations of the EUV variable metal-rich white dwarf GD 394
• The polluted atmosphere of the white dwarf NLTT 25792 and the diversity of circumstellar environments
• Galactic vs. Extragalactic Origin of the Peculiar Transient SCP 06F6
• UV-excess sources with a red/IR-counterpart: low-mass companions, debris disks and QSO selection
• Circumstellar Disks at White Dwarfs: Observations
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• Can tidal evolution lead to close-in planetary bodies around white dwarfs II: volcanism and transits
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