A Gaseous Metal Disk Around a White Dwarf

@article{Gnsicke2006AGM,
  title={A Gaseous Metal Disk Around a White Dwarf},
  author={Boris T. G{\"a}nsicke and Thomas R. Marsh and John Southworth and Alberto Rebassa-Mansergas},
  journal={Science},
  year={2006},
  volume={314},
  pages={1908 - 1910}
}
The destiny of planetary systems through the late evolution of their host stars is very uncertain. We report a metal-rich gas disk around a moderately hot and young white dwarf. A dynamical model of the double-peaked emission lines constrains the outer disk radius to just 1.2 solar radii. The likely origin of the disk is a tidally disrupted asteroid, which has been destabilized from its initial orbit at a distance of more than 1000 solar radii by the interaction with a relatively massive… 

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