Likely detection of water-rich asteroid debris in a metal-polluted white dwarf

@article{Raddi2015LikelyDO,
  title={Likely detection of water-rich asteroid debris in a metal-polluted white dwarf},
  author={R. Raddi and B. Gaensicke and D. Koester and J. Farihi and J. Hermes and S. Scaringi and E. Breedt and J. Girven},
  journal={Monthly Notices of the Royal Astronomical Society},
  year={2015},
  volume={450},
  pages={2083-2093}
}
The cool white dwarf SDSS J124231.07+522626.6 exhibits photospheric absorption lines of eight distinct heavy elements in medium resolution optical spectra, notably including oxygen. The Teff = 13 000 K atmosphere is helium-dominated, but the convection zone contains significant amounts of hydrogen and oxygen. The four most common rock-forming elements (O, Mg, Si, and Fe) account for almost all the accreted mass, totalling at least 1.2 × 1024 g, similar to the mass of Ceres. The time-averaged… Expand

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