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

We present Atacama Large Millimeter/submillimeter Array [C ii] 158 μm line and underlying far-infrared (FIR) continuum emission observations (070 × 056 resolution) toward HSC J124353.93+010038.5 (J1243+0100) at z = 7.07, the only low-luminosity (M1450 > −25 mag) quasar currently known 7. The FIR is bright (1.52 mJy) resolved with a total luminosity of LFIR 3.5 1012 L⊙. spatially extended component responsible for ∼40% emission. area-integrated spectrum shows broad wing (FWHM 997 km s−1, L[C 1.2 109 L⊙), as well core 235 1.9 L⊙). This first detection galactic-scale quasar-driven outflow (atomic rate >447 M⊙ yr−1) estimated large mass-loading factor (e.g., ≳9 relative to ii]-based star formation rate) suggests that this will soon quench host. gas dynamics are governed by rotation, rotation curve suggestive compact bulge (∼3.3 1010 M⊙), although it not yet resolved. Finally, we found J1243+0100 has black hole mass–to–dynamical mass (and –to–bulge mass) ratio ∼0.4% (∼1%), consistent local value within uncertainties. Our results therefore suggest hole–host coevolution relation already in place ∼ 7 object.