Circumstellar Disks at White Dwarfs: Observations

Abstract

The current picture painted by the observations of circumstellar dust at white dwarfs, and the consequent atmospheric pollution, is of a surviving planetary system. This chapter recounts in detail both the discovery and empirical characterization of dust disks at single white dwarfs, including all observational data available up to early 2011. Observations of the disks themselves and the accreted heavy elements within the stellar photospheres are consistent with tidally disrupted asteroid analogs. The observed chemistry supports objects that condensed within the inner regions of main-sequence stars and thus far appear similar in constitution to the terrestrial planets and their building blocks.

Chapter from the book "White Dwarf Atmospheres and Circumstellar Environments", ed. D. W. Hoard (Wiley-VCH), 2011

References in corpus (25)

• A gaseous metal disk around a white dwarf
• The Chemical Composition of an Extrasolar Minor Planet
• Pollution of single white dwarfs by accretion of many small asteroids
• Externally-polluted white dwarfs with dust disks
• On the Spectral Evolution of Cool, Helium-Atmosphere White Dwarfs: Detailed Spectroscopic and Photometric Analysis of DZ Stars
• Survival of a brown dwarf after engulfment by a red giant star
• Debris Disks Around White Dwarfs: The DAZ Connection
• Carbon Deficiency in Externally-Polluted White Dwarfs: Evidence for Accretion of Asteroids
• Six White Dwarfs with Circumstellar Silicates
• The accretion-diffusion scenario for metals in cool white dwarfs
• SDSSJ104341.53+085558.2: A second white dwarf with a gaseous debris disc
• A Debris Disk around the Central Star of the Helix Nebula?
• On the Nature of the Dust in the Debris Disk Around HD69830
• Infrared Emission from the Dusty Disk Orbiting GD 362, An Externally-Polluted White Dwarf
• A Spitzer White Dwarf Infrared Survey
• The Ratio of Helium- to Hydrogen-Atmosphere White Dwarfs: Direct Evidence for Convective Mixing
• X-ray and Infrared Observations of Two Externally-Polluted White Dwarfs
• Spitzer IRAC Observations of White Dwarfs. II. Massive Planetary and Cold Brown Dwarf Companions to Young and Old Degenerates
• Circumstellar Dust Created by Terrestrial Planet Formation in HD 113766
• Hot DB White Dwarfs from the Sloan Digital Sky Survey
• IRS Spectra of Solar-Type Stars: \break A Search for Asteroid Belt Analogs
• Cool Companions to White Dwarf Stars from the Two Micron All Sky Survey All Sky Data Release
• Near-Infrared Constraints on the Presence of Warm Dust at Metal-Rich, Helium Atmosphere White Dwarfs
• On the origin of the ultramassive white dwarf GD50
• Cool Customers in the Stellar Graveyard IV: Spitzer Search for Mid-IR excesses Around Five DAs

Cited by in corpus (6)

• The frequency of planetary debris around young white dwarfs
• The frequency and infrared brightness of circumstellar discs at white dwarfs
• The WIRED Survey II: Infrared Excesses in the SDSS DR7 White Dwarf Catalog
• Signs of a faint disc population at polluted white dwarfs
• Evidence of Rocky Planetesimals Orbiting Two Hyades Stars
• A subtle IR excess associated with a young White Dwarf in the Edinburgh-Cape Blue Object Survey