A 3 Gyr White Dwarf with Warm Dust Discovered via the Backyard Worlds: Planet 9 Citizen Science Project

@article{Debes2019A3G,
  title={A 3 Gyr White Dwarf with Warm Dust Discovered via the Backyard Worlds: Planet 9 Citizen Science Project},
  author={John H. Debes and Melina Th{\'e}venot and Marc J. Kuchner and Adam J. Burgasser and Adam C. Schneider and Aaron M. Meisner and Jonathan Gagn{\'e} and Jacqueline K. Faherty and Jon M. Rees and Michaela B. Allen and Dan Caselden and Michael C. Cushing and John P. Wisniewski and Katelyn N. Allers},
  journal={The Astrophysical Journal Letters},
  year={2019},
  volume={872}
}
Infrared excesses due to dusty disks have been observed orbiting white dwarfs with effective temperatures between 7200 and 25,000 K, suggesting that the rate of tidal disruption of minor bodies massive enough to create a coherent disk declines sharply beyond 1 Gyr after white dwarf formation. We report the discovery that the candidate white dwarf LSPM J0207+3331, via the Backyard Worlds: Planet 9 citizen science project and Keck Observatory follow-up spectroscopy, is hydrogen dominated with a… 

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