Rings in the Planetesimal Disk of beta Pictoris.

  title={Rings in the Planetesimal Disk of beta Pictoris.},
  author={Kalas and Larwood and Smith and Schultz},
  journal={The Astrophysical journal},
  volume={530 2},
The nearby main-sequence star beta Pictoris is surrounded by an edge-on disk of dust produced by the collisional erosion of larger planetesimals. Here we report the discovery of substructure within the northeast extension of the disk midplane that may represent an asymmetric ring system around beta Pic. We present a dynamical model showing that a close stellar flyby with a quiescent disk of planetesimals can create such rings, along with previously unexplained disk asymmetries. Thus we infer… Expand

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