Quasar Radiative Feedback May Suppress Galaxy Growth on Intergalactic Scales at $z = 6.3$
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2025
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| author | Zhu, Yongda Egami, Eiichi Fan, Xiaohui Sun, Fengwu Becker, George D. Cain, Christopher Chen, Huanqing Eilers, Anna-Christina Fudamoto, Yoshinobu Helton, Jakob M. Jin, Xiangyu Pudoka, Maria Bunker, Andrew J. Cai, Zheng Champagne, Jaclyn B. Ji, Zhiyuan Lin, Xiaojing Liu, Weizhe Ma, Hai-Xia Ma, Zheng Maiolino, Roberto Rieke, George H. Rieke, Marcia J. Rinaldi, Pierluigi Sun, Yang Tee, Wei Leong Wang, Feige Yang, Jinyi Yue, Minghao Zhang, Junyu |
| author_facet | Zhu, Yongda Egami, Eiichi Fan, Xiaohui Sun, Fengwu Becker, George D. Cain, Christopher Chen, Huanqing Eilers, Anna-Christina Fudamoto, Yoshinobu Helton, Jakob M. Jin, Xiangyu Pudoka, Maria Bunker, Andrew J. Cai, Zheng Champagne, Jaclyn B. Ji, Zhiyuan Lin, Xiaojing Liu, Weizhe Ma, Hai-Xia Ma, Zheng Maiolino, Roberto Rieke, George H. Rieke, Marcia J. Rinaldi, Pierluigi Sun, Yang Tee, Wei Leong Wang, Feige Yang, Jinyi Yue, Minghao Zhang, Junyu |
| contents | We present observational evidence that intense ionizing radiation from a luminous quasar suppresses nebular emission in nearby galaxies on intergalactic scales at $z=6.3$. Using JWST/NIRCam grism spectroscopy from the SAPPHIRES and EIGER programs, we identify a moderate but statistically significant decline in [O\,\textsc{iii}]\,$\lambda5008$ luminosity relative to the UV continuum ($L_{5008}/L_{1500}$) among galaxies within $\sim$ 7 comoving Mpc (cMpc) of the quasar J0100$+$2802, the most UV-luminous quasar known at this epoch ($M_{1450}=-29.26$). While $L_{1500}$ remains roughly constant with transverse distance, $L_{5008}$ increases significantly, suggesting suppression of very recent star formation toward the quasar. The effect persists after controlling for completeness, local density, and UV luminosity, and correlates with the projected photoionization-rate profile $Γ_{\mathrm{qso}}$. A weaker but directionally consistent suppression in $L_{5008}/L_{1500}$ is also observed along the line of sight. The transverse suppression radius ($\sim$ 7 cMpc) implies a recent radiative episode with a cumulative duration $\sim$ 3.1 Myr, shorter than required for thermal photoheating to dominate and thus more naturally explained by rapid H$_2$ photodissociation and related radiative processes. Environmental effects alone appear insufficient to explain the signal. Our results provide direct, geometry-based constraints on large-scale quasar radiative feedback and recent quasar lifetimes. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2509_00153 |
| institution | arXiv |
| publishDate | 2025 |
| record_format | arxiv |
| spellingShingle | Quasar Radiative Feedback May Suppress Galaxy Growth on Intergalactic Scales at $z = 6.3$ Zhu, Yongda Egami, Eiichi Fan, Xiaohui Sun, Fengwu Becker, George D. Cain, Christopher Chen, Huanqing Eilers, Anna-Christina Fudamoto, Yoshinobu Helton, Jakob M. Jin, Xiangyu Pudoka, Maria Bunker, Andrew J. Cai, Zheng Champagne, Jaclyn B. Ji, Zhiyuan Lin, Xiaojing Liu, Weizhe Ma, Hai-Xia Ma, Zheng Maiolino, Roberto Rieke, George H. Rieke, Marcia J. Rinaldi, Pierluigi Sun, Yang Tee, Wei Leong Wang, Feige Yang, Jinyi Yue, Minghao Zhang, Junyu Astrophysics of Galaxies Cosmology and Nongalactic Astrophysics We present observational evidence that intense ionizing radiation from a luminous quasar suppresses nebular emission in nearby galaxies on intergalactic scales at $z=6.3$. Using JWST/NIRCam grism spectroscopy from the SAPPHIRES and EIGER programs, we identify a moderate but statistically significant decline in [O\,\textsc{iii}]\,$\lambda5008$ luminosity relative to the UV continuum ($L_{5008}/L_{1500}$) among galaxies within $\sim$ 7 comoving Mpc (cMpc) of the quasar J0100$+$2802, the most UV-luminous quasar known at this epoch ($M_{1450}=-29.26$). While $L_{1500}$ remains roughly constant with transverse distance, $L_{5008}$ increases significantly, suggesting suppression of very recent star formation toward the quasar. The effect persists after controlling for completeness, local density, and UV luminosity, and correlates with the projected photoionization-rate profile $Γ_{\mathrm{qso}}$. A weaker but directionally consistent suppression in $L_{5008}/L_{1500}$ is also observed along the line of sight. The transverse suppression radius ($\sim$ 7 cMpc) implies a recent radiative episode with a cumulative duration $\sim$ 3.1 Myr, shorter than required for thermal photoheating to dominate and thus more naturally explained by rapid H$_2$ photodissociation and related radiative processes. Environmental effects alone appear insufficient to explain the signal. Our results provide direct, geometry-based constraints on large-scale quasar radiative feedback and recent quasar lifetimes. |
| title | Quasar Radiative Feedback May Suppress Galaxy Growth on Intergalactic Scales at $z = 6.3$ |
| topic | Astrophysics of Galaxies Cosmology and Nongalactic Astrophysics |
| url | https://arxiv.org/abs/2509.00153 |