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A fifth companion in the HR 8799 system revealed by Gaia

Lagrange, A. -M. et al.
arXiv (All) · Papers
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earth-and-planetary-astrophysics
HR 8799 is the benchmark young multi-planet system, hosting four directly imaged giant planets orbiting between a warm inner belt and a cold outer debris ring. However, the few-au region has remained observationally inaccessible, lying beyond the reach of conventional high-contrast imaging and chall
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