Published on Mon Apr 12 2021

Subaru High-z Exploration of Low-Luminosity Quasars (SHELLQs). XIII. Large-scale Feedback and Star Formation in a Low-Luminosity Quasar at z = 7.07 on the Local Black Hole to Host Mass Relation

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We present ALMA CII 158 m line and underlying far-infrared (FIR) continuum emission observations ( resolution) toward HSC J124353.93010038.5 (J12430100) at , the only low-luminosity ( mag) quasar currently known at . The FIR continuum is bright (1.52 mJy) and resolved with a total luminosity of . The spatially extended component is responsible for of the emission. The area-integrated CII spectrum shows a broad wing ( km s, ) as well as a bright core ( km s, ). This wing is the first detection of a galactic-scale quasar-driven outflow (atomic outflow rate yr) at . The estimated large mass loading factor of the total outflow (e.g., relative to the CII-based SFR) suggests that this outflow will soon quench the star-formation of the host. The core gas dynamics are governed by rotation, with a rotation curve suggestive of a compact bulge (), although it is not yet spatially resolved. Finally, we found that J12430100 has a black hole mass-to-dynamical mass ratio (and -to-bulge mass ratio) of (), consistent with the local value within uncertainties. Our results therefore suggest that the black hole-host co-evolution relation is already in place at for this object.

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