Journal
SCIENCE
Volume 342, Issue 6155, Pages 218-220Publisher
AMER ASSOC ADVANCEMENT SCIENCE
DOI: 10.1126/science.1239447
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Funding
- NASA [NAS 5-26555]
- W. M. Keck Foundation
- UK Science and Technology Facilities Council [ST/J003344/1, ST/I001719/1]
- European Research Council under the European Union [267697]
- NOAO through the Telescope System Instrumentation Program [2011B-0554]
- NSF
- [12169]
- [12474]
- STFC [ST/I001719/1, ST/J003344/3, ST/K003453/1, ST/K003453/2, ST/J003344/2, ST/J003344/1] Funding Source: UKRI
- Science and Technology Facilities Council [ST/J003344/1, ST/K003453/1, ST/J003344/2, ST/J003344/3, ST/K003453/2, ST/I001719/1] Funding Source: researchfish
- European Research Council (ERC) [267697] Funding Source: European Research Council (ERC)
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The existence of water in extrasolar planetary systems is of great interest because it constrains the potential for habitable planets and life. We have identified a circumstellar disk that resulted from the destruction of a water-rich and rocky extrasolar minor planet. The parent body formed and evolved around a star somewhat more massive than the Sun, and the debris now closely orbits the white dwarf remnant of the star. The stellar atmosphere is polluted with metals accreted from the disk, including oxygen in excess of that expected for oxide minerals, indicating that the parent body was originally composed of 26% water by mass. This finding demonstrates that water-bearing planetesimals exist around A- and F-type stars that end their lives as white dwarfs.
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