New HST data and modeling reveal a massive planetesimal collision around Fomalhaut

@article{Gspr2020NewHD,
  title={New HST data and modeling reveal a massive planetesimal collision around Fomalhaut},
  author={Andr{\'a}s G{\'a}sp{\'a}r and George H. Rieke},
  journal={Proceedings of the National Academy of Sciences},
  year={2020},
  volume={117},
  pages={9712 - 9722}
}
  • A. Gáspár, G. Rieke
  • Published 2020
  • Physics, Medicine
  • Proceedings of the National Academy of Sciences
Significance Although originally thought to be a massive exoplanet, the faintness of Fomalhaut b in the infrared and its failure to perturb Fomalhaut’s debris ring indicate a low mass. We use all available data to reveal that it has faded in brightness and grown in extent, with motion consistent with an escaping orbit. This behavior confirms suggestions that the source is a dispersing cloud of dust, produced by a massive collision between two planetesimals. The visible signature appears to be… Expand
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TLDR
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