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Paper detail

Evidence for an Anhydrous Carbonaceous Extrasolar Minor Planet

Using Keck/HIRES, we report abundances of 11 different elements heavier than helium in the spectrum of Ton 345, a white dwarf that has accreted one of its own minor planets. This particular extrasolar planetesimal which was at least 60% as massive as Vesta appears to have been carbon-rich and water-poor; we suggest it was compositionally similar to those Kuiper Belt Objects with relatively little ice.

preprint2014arXivOpen access
M. JuraP. DufourS. XuB. ZuckermanB. KleinE. D. YoungC. Melis
astro-ph.EP
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M. JuraP. DufourS. XuB. ZuckermanB. KleinE. D. YoungC. Melis

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