Molecular Outflows in z > 6 Unobscured QSO Hosts Driven by Star Formation

Abstract Feedback and outflows in galaxies that are associated with a quasar phase expected to be pivotal quenching the most massive galaxies. However, observations targeting molecular outflow phase, which dominates both mass momentum removes immediate fuel for star formation, limited high- z QSO hosts. Massive quiescent found at ? 4 predicted have quenched formation already by 5 undergone their intense growth > 6. Here, we present two Atacama Large Millimeter/submillimeter Array (ALMA) detections of outflows, traced blueshifted absorption OH 119 ? m doublet, from sample three 6 infrared luminous hosts: J2310+1855 P183+05. is also detected emission P183+05, tentatively third source: P036+03. Using similar assumptions as dusty star-forming galaxy find our QSOs drive comparable rates, comparably energetic except J2310+1855's significantly lower energy flux. We do not evidence, nor require additional input central active galactic nucleus (AGN) J2310+1855, but cannot rule out an AGN contribution P183+05 if significant L FIR assumed and/or covering fraction high (?53%), evidence literature suggests unlikely these sources. Differences observed spectral properties may instead caused hosts’ more compact dust continuums, limiting altitude regions outflow.