Preprint
Sep 2026
A fifth companion in the HR 8799 system revealed by Gaia
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 challenging for radial-ve...
A. Lagrange, K. Goździewski, F. Kiefer et al.
· 0 citations