Planetary embryos and planetesimals residing in thin debris discs

  title={Planetary embryos and planetesimals residing in thin debris discs},
  author={Alice C. Quillen and Alessandro Morbidelli and Alexander J. Moore},
  journal={Monthly Notices of the Royal Astronomical Society},
We consider constraints on the planetesimal population residing in the discs of AU Microscopii (AU Mic), β Pictoris (β Pic) and Fomalhaut taking into account their observed thicknesses and normal disc opacities. We estimate that bodies of radius 5, 180 and 70 km are responsible for initiating the collisional cascade accounting for the dust production for AU Mic, β Pic and Fomalhaut’s discs, respectively, at break radii from the star where their surface brightness profiles change slope. Larger… Expand

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