Quasar host galaxies at z~6 are systematically more compact than typical star-forming galaxies, and the most compact hosts contain the most overmassive black holes and the least cold gas.
5.2Spergel fitting in GILDAS:Note that the deconvolved size provided by theimfitis the FWHM of the major axis of a 2D Gaussian profile
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Overmassive Black holes live in compact galaxies in the early Universe
Quasar host galaxies at z~6 are systematically more compact than typical star-forming galaxies, and the most compact hosts contain the most overmassive black holes and the least cold gas.