Four-of-a-kind? Comprehensive atmospheric characterisation of the HR
8799 planets with VLTI/GRAVITY
Four-of-a-kind? Comprehensive atmospheric characterisation of the HR
8799 planets with VLTI/GRAVITY
With four companions at separations from 16 to 71 au, HR 8799 is a unique target for direct imaging, presenting an opportunity for the comparative study of exoplanets with a shared formation history. Combining new VLTI/GRAVITY observations obtained within the ExoGRAVITY program with archival data, we perform a systematic atmospheric …