No large population of unbound or wide-orbit Jupiter-mass planets

@article{Mrz2017NoLP,
  title={No large population of unbound or wide-orbit Jupiter-mass planets},
  author={Przemek Mr{\'o}z and Andrzej Udalski and Jan Skowron and Radosław Poleski and Szymon Kozłowski and Michał K. Szymański and Igor Soszyński and Łukasz Wyrzykowski and Paweł Pietrukowicz and Krzysztof Ulaczyk and Dorota M. Skowron and Michał Pawlak},
  journal={Nature},
  year={2017},
  volume={548},
  pages={183-186}
}
Planet formation theories predict that some planets may be ejected from their parent systems as result of dynamical interactions and other processes. Unbound planets can also be formed through gravitational collapse, in a way similar to that in which stars form. A handful of free-floating planetary-mass objects have been discovered by infrared surveys of young stellar clusters and star-forming regions as well as wide-field surveys, but these studies are incomplete for objects below five Jupiter… 
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