A disintegrating minor planet transiting a white dwarf

@article{Vanderburg2015ADM,
  title={A disintegrating minor planet transiting a white dwarf},
  author={Andrew M. Vanderburg and John Asher Johnson and Saul A. Rappaport and Allyson Bieryla and Jonathan M. Irwin and John Arban Lewis and David M. Kipping and Warren R. Brown and P. Dufour and David R. Ciardi and Ruth Angus and Laura Schaefer and David W. Latham and David Charbonneau and Charles A. Beichman and Jason D. Eastman and Nate McCrady and Robert A. Wittenmyer and Jason T. Wright},
  journal={Nature},
  year={2015},
  volume={526},
  pages={546-549}
}
Most stars become white dwarfs after they have exhausted their nuclear fuel (the Sun will be one such). Between one-quarter and one-half of white dwarfs have elements heavier than helium in their atmospheres, even though these elements ought to sink rapidly into the stellar interiors (unless they are occasionally replenished). The abundance ratios of heavy elements in the atmospheres of white dwarfs are similar to the ratios in rocky bodies in the Solar System. This fact, together with the… 

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