1. Fast Outflow in the Host Galaxy of the Luminous z $=$ 7.5 Quasar J1007$+$2115
- Author
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Liu, Weizhe, Fan, Xiaohui, Yang, Jinyi, Bañados, Eduardo, Wang, Feige, Wolf, Julien, Barth, Aaron J., Costa, Tiago, Decarli, Roberto, Eilers, Anna-Christina, Loiacono, Federica, Shen, Yue, Farina, Emanuele Paolo, Jin, Xiangyu, Jun, Hyunsung D., Li, Mingyu, Lupi, Alessandro, Marshall, Madeline A., Pan, Zhiwei, Pudoka, Maria, Zhuang, Ming-Yang, Champagne, Jaclyn B., Li, Huan, Sun, Fengwu, Tee, Wei Leong, Vayner, Andrey, and Zhang, Haowen
- Subjects
Astrophysics - Astrophysics of Galaxies - Abstract
James Webb Space Telescope opens a new window to directly probe luminous quasars powered by billion solar mass black holes in the epoch of reionization and their co-evolution with massive galaxies with unprecedented details. In this paper, we report the first results from the deep NIRSpec integral field spectroscopy study of a quasar at $z = 7.5$. We obtain a bolometric luminosity of $\sim$$1.8\times10^{47}$ erg s$^{-1}$ and a black hole mass of $\sim$0.7--2.5$\times10^{9}$ M$_{\odot}$ based on H$\beta$ emission line from the quasar spectrum. We discover $\sim$2 kpc scale, highly blueshifted ($\sim$$-$870 km/s) and broad ($\sim$1400 km/s) [O III] line emission after the quasar PSF has been subtracted. Such line emission most likely originates from a fast, quasar-driven outflow, the earliest one on galactic-scale known so far. The dynamical properties of this outflow fall within the typical ranges of quasar-driven outflows at lower redshift, and the outflow may be fast enough to reach the circumgalactic medium. Combining both the extended and nuclear outflow together, the mass outflow rate, $\sim$300 M$_{\odot}$yr, is $\sim$60%--380% of the star formation rate of the quasar host galaxy, suggesting that the outflow may expel a significant amount of gas from the inner region of the galaxy. The kinetic energy outflow rate, $\sim$3.6$\times10^{44}$ erg s$^{-1}$, is $\sim$0.2% of the quasar bolometric luminosity, which is comparable to the minimum value required for negative feedback based on simulation predictions. The dynamical timescale of the extended outflow is $\sim$1.7 Myr, consistent with the typical quasar lifetime in this era.
- Published
- 2024