A rich population of free-floating planets in the Upper Scorpius young stellar association

@article{MiretRoig2021ARP,
  title={A rich population of free-floating planets in the Upper Scorpius young stellar association},
  author={N. Miret-Roig and Herv'e Bouy and Sean N. Raymond and Motohide Tamura and Emmanuel Bertin and David Barrado and Javier Olivares and P. A. B. Galli and Jean-Charles Cuillandre and Luis M. Sarro and Angel Berihuete and N. Hu'elamo},
  journal={Nature Astronomy},
  year={2021},
  volume={6},
  pages={89-97}
}
The nature and origin of free-floating planets (FFPs) are still largely unconstrained because of a lack of large homogeneous samples to enable a statistical analysis of their properties. So far, most FFPs have been discovered using indirect methods; microlensing surveys have proved particularly successful to detect these objects down to a few Earth masses 1 , 2 . However, the ephemeral nature of microlensing events prevents any follow-up observations and individual characterization. Several… 
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