EVIDENCE FOR AN ANHYDROUS CARBONACEOUS EXTRASOLAR MINOR PLANET

Journal Article · Tue Jan 20 00:00:00 EST 2015 · Astrophysical Journal

DOI:https://doi.org/10.1088/0004-637X/799/1/109· OSTI ID:22364438

Jura, M.; Xu, S.; Zuckerman, B.; Klein, B. ^[1]; Dufour, P. ^[2]; Young, E. D. ^[3]

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1. Department of Physics and Astronomy, University of California, Los Angeles, CA 90095-1562 (United States)
2. Département de Physique, Université de Montréal, Montréal, Québec H3C 3J7 (Canada)
3. Department of Earth, Planetary, and Space Sciences, University of California, Los Angeles, Los Angeles, CA 90095 (United States)

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.

• OSTI ID: 22364438
• Journal Information: Astrophysical Journal, Vol. 799, Issue 1; Other Information: Country of input: International Atomic Energy Agency (IAEA); ISSN 0004-637X
• Country of Publication: United States
• Language: English

Related Subjects

79 ASTROPHYSICS
COSMOLOGY AND ASTRONOMY
CARBON
ELEMENT ABUNDANCE
ICE
PLANETS
STAR ACCRETION
WATER
WHITE DWARF STARS