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The WIRED Survey. I. A Bright IR Excess Due to Dust Around the Heavily Polluted White Dwarf Galex J193156.8+011745With the launch of the Wide-Field Infrared Survey Explorer (WISE), a new era of detecting planetary debris around white dwarfs (WDs) has begun with the WISE InfraRed Excesses around Degenerates (WIRED) Survey. The WIRED survey will be sensitive to substellar objects and dusty debris around WDs out to distances exceeding 100 pc, well beyond the completeness level of local WDs and covering a large fraction of known WDs detected with the SDSS DR4 WD catalog. In this paper, we report an initial result of the WIRED survey, the detection of the heavily polluted hydrogen WD (spectral type DAZ) GALEX Jl93156.S-KlI1745 at 3.35 and 4.6/Lm. We find that the excess is consistent with either a narrow dusty ring with an inner radius of 29 RWD. outer radius of 40 RWD, and a face-on inclination, or a disk with an inclination of 70 , an inner radius of 23 RWD. and an outer radius of 80 RWD. We also report initial optical spectroscopic monitoring of several metal lines present in the photosphere and find no variability in the line strengths or radial velocities of the lines. We rule out all but planetary mass companions to GALEXl931 out to 0.5 AU.
Document ID
Acquisition Source
Goddard Space Flight Center
Document Type
Reprint (Version printed in journal)
Debes, John H.
(NASA Goddard Space Flight Center Greenbelt, MD, United States)
Hoard, D. W.
(California Inst. of Tech. Pasadena, CA, United States)
Kilic, Mukremin
(Smithsonian Astrophysical Observatory Cambridge, MA, United States)
Wachter, Stefanie
(California Inst. of Tech. Pasadena, CA, United States)
Leisawitz, David T.
(NASA Goddard Space Flight Center Greenbelt, MD, United States)
Cohen, Martin
(Monterey Inst. for Research in Astronomy Marina, CA, United States)
Kirkpatrick, J. Davy
(California Inst. of Tech. Pasadena, CA, United States)
Griffith, Roger L.
(California Inst. of Tech. Pasadena, CA, United States)
Date Acquired
August 26, 2013
Publication Date
March 1, 2011
Publication Information
Publication: The Astrophysical Journal
Volume: 729
Issue: 1
Subject Category
Report/Patent Number
Funding Number(s)
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