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Title: 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.
Authors:
; ; ;  [1] ;  [2] ;  [3] ;  [4]
  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)
  4. Center for Astrophysics and Space Sciences, University of California, San Diego, CA 92093-0424 (United States)
Publication Date:
OSTI Identifier:
22364438
Resource Type:
Journal Article
Resource Relation:
Journal Name: Astrophysical Journal; Journal Volume: 799; Journal Issue: 1; Other Information: Country of input: International Atomic Energy Agency (IAEA)
Country of Publication:
United States
Language:
English
Subject:
79 ASTROPHYSICS, COSMOLOGY AND ASTRONOMY; CARBON; ELEMENT ABUNDANCE; ICE; PLANETS; STAR ACCRETION; WATER; WHITE DWARF STARS