A Debris Disk around the Central Star of the Helix Nebula?

Abstract

Excess emission from a point-like source coincident with the central star of the Helix Nebula is detected with Spitzer at 8, 24, and 70 um. At 24 um, the central source is superposed on an extended diffuse emission region. While the [OIV] 25.89 um line contributes to the diffuse emission, a 10-35 um spectrum of the central source shows a strong thermal continuum. The excess emission from the star most likely originates from a dust disk with blackbody temperatures of 90--130 K. Assuming a simple optically thin debris disk model, the dust is distributed in a ring between ~35 and ~150 AU from the central star, possibly arising from collisions of Kuiper-Belt-like Objects or the break-up of comets from an Oort-like cloud that have survived from the post-main-sequence evolution of the central star.

arXiv commentemulateapj format, accepted for publication in ApJ Letters

References in corpus (20)

• The Infrared Array Camera (IRAC) for the Spitzer Space Telescope
• The Infrared Spectrograph on the Spitzer Space Telescope
• A Tidally-Disrupted Asteroid Around the White Dwarf G29-38
• Are There Unstable Planetary Systems Around White Dwarfs?
• The SMART Data Analysis Package for the Infrared Spectrograph on the Spitzer Space Telescope
• Reduction Algorithms for the Multiband Imaging Photometer for Spitzer
• The accretion of planets and brown dwarfs by giant stars -- II. solar mass stars on the red giant branch
• The Dust cloud around the White Dwarf G 29-38
• Keplerian discs around post-AGB stars: a common phenomenon?
• A Hubble Space Telescope Survey for Resolved Companions of Planetary-Nebula Nuclei
• A Dusty Disk Around GD 362, a White Dwarf With a Uniquely High Photospheric Metal Abundance
• The Accretion of Brown Dwarfs and Planets by Giant Stars -- I. AGB Stars
• Carbon Deficiency in Externally-Polluted White Dwarfs: Evidence for Accretion of Asteroids
• Excess Infrared Radiation from a Massive DAZ White Dwarf: GD362 - a Debris Disk?
• Trigonometric Parallaxes of Central Stars of Planetary Nebulae
• The Enigmatic X-ray Point Sources at the Central Stars of NGC 6543 and NGC 7293
• Unraveling the Helix Nebula: Its Structure and Knots
• Infrared Observations of The Helix Planetary Nebula
• On the Number of Comets Around White Dwarf Stars: Orbit Survival During the Late Stages of Stellar Evolution
• Variable H-alpha Line Emission from the Central Star of the Helix Nebula

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• The WIRED Survey II: Infrared Excesses in the SDSS DR7 White Dwarf Catalog
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• The Dust cloud around the White Dwarf G 29-38. 2. Spectrum from 5-40 microns and mid-infrared variability
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• A mid-IR interferometric survey with MIDI/VLTI: resolving the second-generation protoplanetary disks around post-AGB binaries
• An Unbiased Survey of 500 Nearby Stars for Debris Disks: A JCMT Legacy Program
• The Discovery of a Companion to the Lowest Mass White Dwarf
• Spitzer 24 um Survey for Dust Disks around Hot White Dwarfs
• Ground-based Optical and SPITZER Infrared Imaging Observations of Comet 21P/Giacobini-Zinner
• Polluting White Dwarfs with Perturbed Exo-Comets
• The lifetimes of planetary debris discs around white dwarfs
• The Herschel Planetary Nebula Survey (HerPlaNS) I. Data Overview and Analysis Demonstration with NGC 6781
• VLT / Infrared Integral Field Spectrometer Observations of Molecular Hydrogen Lines in the Knots in the Planetary Nebula NGC 7293 (the Helix Nebula)
• The Detection of Dust around NN Ser
• ALMA and Herschel Observations of the Prototype Dusty and Polluted White Dwarf G29-38
• An occultation event in a triple post-AGB star
• Dusty Disks Around Central Stars of Planetary Nebulae
• The origin of circumstellar features in the spectra of hot DA white dwarfs
• Planetary Nebulae Detected in the Spitzer Space Telescope GLIMPSE II Legacy Survey
• The Discrepant Kinematics of ORLs and CELs in NGC 7009 as a Function of Ionization Structure
• Hubble Space Telescope Imaging of the Binary Nucleus of the Planetary Nebula EGB 6
• Spitzer/IRS investigation of MIPSGAL 24 microns compact bubbles
• Disk evaporation in a planetary nebula
• The Nucleus of the Planetary Nebula EGB 6 as a Post-Mira Binary
• Discovery of a halo around the Helix Nebula NGC 7293 in the WISE all-sky survey
• Herschel imaging of the dust in the Helix Nebula (NGC 7293)
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• MIPSGAL 24 μm Observations of Galactic Planetary Nebulae
• Circumstellar Disks at White Dwarfs: Observations
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• The bow-shock and high-speed jet in the faint, 40 arcmin diameter, outer halo of the evolved Helix planetary nebula (NGC 7293)
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• Current Unsolved Problems in Planetary Nebulae Research
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• Shape, Structure, and Morphology in Planetary Nebulae