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Title: WIRED for EC: New White Dwarfs with WISE Infrared Excesses and New Classification Schemes from the Edinburgh–Cape Blue Object Survey

Abstract

We present a simple method for identifying candidate white dwarf systems with dusty exoplanetary debris based on a single temperature blackbody model fit to the infrared excess. We apply this technique to a sample of Southern Hemisphere white dwarfs from the recently completed Edinburgh–Cape Blue Object Survey and identify four new promising dusty debris disk candidates. We demonstrate the efficacy of our selection method by recovering three of the four Spitzer confirmed dusty debris disk systems in our sample. Further investigation using archival high-resolution imaging shows that Spitzer data of the unrecovered fourth object is likely contaminated by a line-of-sight object that either led to a misclassification as a dusty disk in the literature or is confounding our method. Finally, in our diagnostic plot, we show that dusty white dwarfs, which also host gaseous debris, lie along a boundary of our dusty debris disk region, providing clues to the origin and evolution of these especially interesting systems.

Authors:
; ; ; ;  [1];  [2];  [3]
  1. Physics and Astronomy Department, University of North Carolina at Chapel Hill, Chapel Hill, NC 27599 (United States)
  2. Space Telescope Science Institute, 3700 San Martin Drive, Baltimore, MD 21218 (United States)
  3. Department of Physics, University of the Western Cape, Private Bag X17, Bellville 7535 (South Africa)
Publication Date:
OSTI Identifier:
22679696
Resource Type:
Journal Article
Journal Name:
Astrophysical Journal
Additional Journal Information:
Journal Volume: 849; Journal Issue: 2; Other Information: Country of input: International Atomic Energy Agency (IAEA); Journal ID: ISSN 0004-637X
Country of Publication:
United States
Language:
English
Subject:
79 ASTROPHYSICS, COSMOLOGY AND ASTRONOMY; CLASSIFICATION; RESOLUTION; SOUTHERN HEMISPHERE; STAR EVOLUTION; WHITE DWARF STARS

Citation Formats

Dennihy, E., Clemens, J. C., Dunlap, B. H., O’Brien, P. C., Fuchs, J. T., Debes, John H., and Kilkenny, D.. WIRED for EC: New White Dwarfs with WISE Infrared Excesses and New Classification Schemes from the Edinburgh–Cape Blue Object Survey. United States: N. p., 2017. Web. doi:10.3847/1538-4357/AA8EF2.
Dennihy, E., Clemens, J. C., Dunlap, B. H., O’Brien, P. C., Fuchs, J. T., Debes, John H., & Kilkenny, D.. WIRED for EC: New White Dwarfs with WISE Infrared Excesses and New Classification Schemes from the Edinburgh–Cape Blue Object Survey. United States. doi:10.3847/1538-4357/AA8EF2.
Dennihy, E., Clemens, J. C., Dunlap, B. H., O’Brien, P. C., Fuchs, J. T., Debes, John H., and Kilkenny, D.. Fri . "WIRED for EC: New White Dwarfs with WISE Infrared Excesses and New Classification Schemes from the Edinburgh–Cape Blue Object Survey". United States. doi:10.3847/1538-4357/AA8EF2.
@article{osti_22679696,
title = {WIRED for EC: New White Dwarfs with WISE Infrared Excesses and New Classification Schemes from the Edinburgh–Cape Blue Object Survey},
author = {Dennihy, E. and Clemens, J. C. and Dunlap, B. H. and O’Brien, P. C. and Fuchs, J. T. and Debes, John H. and Kilkenny, D.},
abstractNote = {We present a simple method for identifying candidate white dwarf systems with dusty exoplanetary debris based on a single temperature blackbody model fit to the infrared excess. We apply this technique to a sample of Southern Hemisphere white dwarfs from the recently completed Edinburgh–Cape Blue Object Survey and identify four new promising dusty debris disk candidates. We demonstrate the efficacy of our selection method by recovering three of the four Spitzer confirmed dusty debris disk systems in our sample. Further investigation using archival high-resolution imaging shows that Spitzer data of the unrecovered fourth object is likely contaminated by a line-of-sight object that either led to a misclassification as a dusty disk in the literature or is confounding our method. Finally, in our diagnostic plot, we show that dusty white dwarfs, which also host gaseous debris, lie along a boundary of our dusty debris disk region, providing clues to the origin and evolution of these especially interesting systems.},
doi = {10.3847/1538-4357/AA8EF2},
journal = {Astrophysical Journal},
issn = {0004-637X},
number = 2,
volume = 849,
place = {United States},
year = {2017},
month = {11}
}