First detections of stellar light from quasar host galaxies at z>6

The existence of high-redshift supermassive black holes (SMBHs) – shining brightly as quasars during the first billion years of our universe – presents a conundrum in astrophysics 1 . A broad variety of physical mechanisms have been proposed for the formation and rapid growth of these early SMBHs 2 . Promising diagnostics are the relative properties of the black hole and its host galaxy 3,4 . However, up to now, the detection of stars in quasar host galaxies has been elusive beyond z > 2 , even with deep HST observations 5,6 . Here, we report the first detections of

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