Debris disks: seeing dust, thinking of planetesimals and planets

  title={Debris disks: seeing dust, thinking of planetesimals and planets},
  author={Alexander V. Krivov},
  journal={Research in Astronomy and Astrophysics},
  • A. Krivov
  • Published 26 March 2010
  • Physics, Geology
  • Research in Astronomy and Astrophysics
Debris disks are optically thin, almost gas-free dusty disks observed around a significant fraction of main-sequence stars older than about 10 Myr. Since the circumstellar dust is short-lived, the very existence of these disks is considered as evidence that dust-producing planetesimals are still present in mature systems, in which planets have formed - or failed to form - a long time ago. It is inferred that these planetesimals orbit their host stars at asteroid to Kuiper-belt distances and… 

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