Interstellar Depletion onto Very Small Dust Grains

  title={Interstellar Depletion onto Very Small Dust Grains},
  author={Joseph C. Weingartner and Bruce T. Draine},
  journal={The Astrophysical Journal},
We consider the depletion of elements from the interstellar gas onto a population of very small dust grains. Adopting a grain model in which ~4% of the cosmic C abundance is in grains with radii ≤10 A, we find that the rate of accretion onto these grains is fast enough to account for the observed large depletions of elements like Ti, without invoking unreasonably high rates of mass transfer between interstellar phases or low grain destruction rates. If these grains are composed of arene rings… Expand

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