The WIRED Survey. IV. New Dust Disks from the McCook & Sion White Dwarf Catalog
D. W. Hoard (1,2,3), John H. Debes (4), Stefanie Wachter (1), David T., Leisawitz (5), and Martin Cohen (6) ((1) Max Planck Institut f\"ur, Astronomie, Heidelberg, Germany, (2) Visiting Scientist, MPIA, (3) Eureka, Scientific, Inc., (4) Space Telescope Science Institute

TL;DR
This study uses infrared survey data to identify new white dwarf stars with circumstellar dust disks, expanding the understanding of dust disk properties and their prevalence among white dwarfs.
Contribution
The paper reports the discovery of seven new white dwarf dust disk candidates using infrared data, and compares their properties with previously known disks, highlighting a broader parameter space.
Findings
Seven new white dwarf dust disk candidates identified.
Current census of white dwarf dust disks may be nearly complete at certain wavelengths.
Discovered disks tend to be cooler, narrower, and contain fewer grains.
Abstract
We have compiled photometric data from the Wide-field Infrared Survey Explorer All Sky Survey and other archival sources for the more than 2200 objects in the original McCook & Sion Catalog of Spectroscopically Identified White Dwarfs. We applied color-selection criteria to identify 28 targets whose infrared spectral energy distributions depart from the expectation for the white dwarf photosphere alone. Seven of these are previously known white dwarfs with circumstellar dust disks, five are known central stars of planetary nebulae, and six were excluded for being known binaries or having possible contamination of their infrared photometry. We fit white dwarf models to the spectral energy distributions of the remaining ten targets, and find seven new candidates with infrared excess suggesting the presence of a circumstellar dust disk. We compare the model dust disk properties for these…
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