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- W3197495596 abstract "Observations of $z gtrsim 6$ quasars provide information on the early phasesof the most massive black holes (MBHs) and galaxies. Current observations atsub-mm wavelengths trace cold and warm gas, and future observations will extendinformation to other gas phases and the stellar properties. The goal of thisstudy is to examine the gas life cycle in a $z gtrsim 6$ quasar: fromaccretion from the halo to the galaxy and all the way into the MBH, to how starformation and the MBH itself affect the gas properties. Using a very-highresolution cosmological zoom-in simulation of a $z=7$ quasar includingstate-of-the-art non-equilibrium chemistry, MBH formation, growth and feedback,we investigate the distribution of the different gas phases in the interstellarmedium across cosmic time. We assess the morphological evolution of the quasarhost using different tracers (star- or gas-based) and the thermodynamicdistribution of the MBH accretion-driven outflows, finding that obscuration inthe disc is mainly due to molecular gas, with the atomic component contributingat larger scales and/or above/below the disc plane. Moreover, our results alsoshow that molecular outflows, if present, are more likely the result of gasbeing lifted near the MBH than production within the wind because of thermalinstabilities. Finally, we also discuss how different gas phases can beemployed to dynamically constrain the MBH mass, and argue that resolutionsbelow $sim 100$ pc yield unreliable estimates because of the strongcontribution of the nuclear stellar component to the potential at largerscales." @default.
- W3197495596 created "2021-09-13" @default.
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- W3197495596 date "2021-09-03" @default.
- W3197495596 modified "2023-09-27" @default.
- W3197495596 title "High-redshift quasars and their host galaxies II: multiphase gas and stellar kinematics" @default.
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