A SPITZER SPACE TELESCOPE STUDY OF THE DEBRIS DISKS AROUND FOUR SDSS WHITE DWARFS

@article{Brinkworth2012ASS,
  title={A SPITZER SPACE TELESCOPE STUDY OF THE DEBRIS DISKS AROUND FOUR SDSS WHITE DWARFS},
  author={Carolyn Brinkworth and Boris T. G{\"a}nsicke and Jonathan Girven and Donald Wayne Hoard and Thomas R. Marsh and Steven G. Parsons and Detlev Koester},
  journal={The Astrophysical Journal},
  year={2012},
  volume={750}
}
We present Spitzer Space Telescope data of four isolated white dwarfs that were previously known to harbor circumstellar gaseous disks. Infrared Array Camera photometry shows a significant infrared excess in all of the systems, SDSS0738+1835, SDSS0845+2257, SDSS1043+0855, and SDSS1617+1620, indicative of a dusty extension to those disks. The 4.5 μm excesses seen in SDSS0738, SDSS0845, and SDSS1617 are 7.5, 5.7, and 4.5 times the white dwarf contribution, respectively. In contrast, in SDSS1043… 

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