Vega's hot dust from icy planetesimals scattered inwards by an outward-migrating planetary system

  title={Vega's hot dust from icy planetesimals scattered inwards by an outward-migrating planetary system},
  author={Sean N. Raymond and Amy Bonsor},
  journal={Monthly Notices of the Royal Astronomical Society},
  • S. Raymond, A. Bonsor
  • Published 26 March 2014
  • Physics
  • Monthly Notices of the Royal Astronomical Society
Vega has been shown to host multiple dust populations, including both hot exo-zodiacal dust at sub-AU radii and a cold debris disk extending beyond 100 AU. We use dynamical simulations to show how Vega's hot dust can be created by long-range gravitational scattering of planetesimals from its cold outer regions. Planetesimals are scattered progressively inward by a system of 5-7 planets from 30-60 AU to very close-in. In successful simulations the outermost planets are typically Neptune-mass… 

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