The mass of the young planet Beta Pictoris b through the astrometric motion of its host star

@article{Snellen2018TheMO,
  title={The mass of the young planet Beta Pictoris b through the astrometric motion of its host star},
  author={Ignas A. G. Snellen and Anthony G. A. Brown},
  journal={Nature Astronomy},
  year={2018},
  volume={2},
  pages={883-886}
}
The young massive Jupiters discovered with high-contrast imaging1–4 provide a unique opportunity to study the formation and early evolution of gas giant planets. A key question is to what extent gravitational energy from accreted gas contributes to the internal energy of a newly formed planet. This has led to a range of formation scenarios from ‘cold’ to ‘hot’ start models5–8. For a planet of a given mass, these initial conditions govern its subsequent evolution in luminosity and radius. Except… 
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It is shown that the ~10-million-year-oldβ Pictoris system hosts a massive giant planet, β Pictoris b, located 8 to 15 astronomical units from the star, which confirms that gas giant planets form rapidly within disks and validates the use of disk structures as fingerprints of embedded planets.
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