A quasar pair at z=5.7 is confirmed in a galaxy merger via ALMA, setting a lower limit of >1.2% on the pair fraction at 5.5<z<6 and linking it to the PTA gravitational wave background.
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A Close Quasar Pair in a Massive Galaxy Merger at $z=5.7$
A quasar pair at z=5.7 is confirmed in a galaxy merger via ALMA, setting a lower limit of >1.2% on the pair fraction at 5.5<z<6 and linking it to the PTA gravitational wave background.