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The wired survey. iv. new dust disks from the mccook & sion white dwarf catalog
| Content Provider | NASA Technical Reports Server (NTRS) |
|---|---|
| Author | Leisawitz, David T. Wachter, Stefanie Debes, John H. Cohen, Martin Hoard, D. W. |
| Copyright Year | 2013 |
| Description | 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 new candidates with a comprehensive compilation of previously published parameters for known white dwarfs with dust disks. It is possible that the current census of white dwarfs with dust disks that produce an excess detectable at K-band and shorter wavelengths is close to complete for the entire sample of known WDs to the detection limits of existing near-IR all-sky surveys. The white dwarf dust disk candidates now being found using longer wavelength infrared data are drawn from a previously underrepresented region of parameter space, in which the dust disks are overall cooler, narrower in radial extent, and/or contain fewer emitting grains. |
| File Size | 516795 |
| Page Count | 34 |
| File Format | |
| Alternate Webpage(s) | http://archive.org/details/NASA_NTRS_Archive_20140010715 |
| Archival Resource Key | ark:/13960/t40s4s06r |
| Language | English |
| Publisher Date | 2013-05-03 |
| Access Restriction | Open |
| Subject Keyword | Dwarf Wired Dust Stellar Envelopes White Dwarf Stars Cosmic Dust Wide-field Infrared Survey Explorer Spectral Energy Distribution Infrared Astronomy Sky Surveys Astronomy Ntrs Nasa Technical Reports Server (ntrs) Nasa Technical Reports Server Aerodynamics Aircraft Aerospace Engineering Aerospace Aeronautic Space Science |
| Content Type | Text |
| Resource Type | Article |
