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- W2001159851 abstract "We compute that extrasolar minor planets can retain much of their internal H2O during their host star's red giant evolution. The eventual accretion of a water-rich body or bodies onto a helium white dwarf might supply an observable amount of atmospheric hydrogen, as seems likely for GD 362. More generally, if hydrogen pollution in helium white dwarfs typically results from accretion of large parent bodies rather than interstellar gas as previously supposed, then H2O probably constitutes at least 10% of the aggregate mass of extrasolar minor planets. One observational test of this possibility is to examine the atmospheres of externally polluted white dwarfs for oxygen in excess of that likely contributed by oxides such as SiO2. The relatively high oxygen abundance previously reported in GD 378 can be explained plausibly but not uniquely by accretion of an H2O-rich parent body or bodies. Future ultraviolet observations of white dwarf pollutions can serve to investigate the hypothesis that environments with liquid water that are suitable habitats for extremophiles are widespread in the Milky Way." @default.
- W2001159851 created "2016-06-24" @default.
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- W2001159851 date "2010-09-21" @default.
- W2001159851 modified "2023-10-02" @default.
- W2001159851 title "THE SURVIVAL OF WATER WITHIN EXTRASOLAR MINOR PLANETS" @default.
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- W2001159851 doi "https://doi.org/10.1088/0004-6256/140/5/1129" @default.
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