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| Main Authors: | , , , , , , , , , , , , , , , , , , , , , , , , , |
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| Format: | Preprint |
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2025
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| Online Access: | https://arxiv.org/abs/2504.02305 |
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| _version_ | 1866917358652620800 |
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| author | Zhu, Yongda Rieke, Marcia J. Ho, Luis C. Sun, Yang Rieke, George H. Yuan, Feng Bakx, Tom J. L. C. Becker, George D. Yang, Jinyi Bañados, Eduardo Bischetti, Manuela Cain, Christopher Fan, Xiaohui Fudamoto, Yoshinobu Hashemi, Seyedazim Ikeda, Ryota Ji, Zhiyuan Jin, Xiangyu Liu, Weizhe Liu, Yichen Lyu, Jianwei Ma, Hai-Xia Takeuchi, Tsutomu T. Umehata, Hideki Wang, Feige Tee, Wei Leong |
| author_facet | Zhu, Yongda Rieke, Marcia J. Ho, Luis C. Sun, Yang Rieke, George H. Yuan, Feng Bakx, Tom J. L. C. Becker, George D. Yang, Jinyi Bañados, Eduardo Bischetti, Manuela Cain, Christopher Fan, Xiaohui Fudamoto, Yoshinobu Hashemi, Seyedazim Ikeda, Ryota Ji, Zhiyuan Jin, Xiangyu Liu, Weizhe Liu, Yichen Lyu, Jianwei Ma, Hai-Xia Takeuchi, Tsutomu T. Umehata, Hideki Wang, Feige Tee, Wei Leong |
| contents | Feedback from accreting supermassive black holes may regulate galaxy evolution, but statistical evidence linking nuclear winds to kiloparsec-scale cold gas outflows remains limited in the early universe. Here we report statistical evidence for such a connection in a sample of luminous quasars at $z \sim 5.5$. We compare stacked [C II] 158 $μ$m emission profiles from ALMA observations, which trace galactic-scale neutral gas, for quasars with and without broad absorption lines (BALs) that indicate powerful nuclear winds on sub-kiloparsec scales. A total of 5 BAL and 11 non-BAL quasar spectra are included in the stacking analysis. The BAL quasar stack exhibits a potential blueshifted broad component in the [C II] line profile, with a velocity offset of $Δv_{\rm b} = -2.1 \times 10^2\,\rm km\,s^{-1}$ and a full width at half maximum of $1.18 \times 10^3\,\rm km\,s^{-1}$, whereas the non-BAL stack shows no obvious broad component. Using a conservative ``clean-stack'' selection that excludes quasars with partial [C II] spectral coverage, the BAL broad residual is reduced to a hint-level feature. We estimate that up to a few percent to one-quarter of the nuclear wind energy may be transferred to cold neutral gas on kiloparsec scales. Although the sample size is limited, these results suggest a potential link between BAL winds and cold gas feedback in quasar host galaxies. These results provide empirical motivation for future tests of how multiphase outflows relate to the diversity of quasar host properties, including $M_{\rm BH}/M_*$. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2504_02305 |
| institution | arXiv |
| publishDate | 2025 |
| record_format | arxiv |
| spellingShingle | A Potential Link between Nuclear Winds and Cold Gas Outflows on Kiloparsec Scales in Reionization-Era Quasars Zhu, Yongda Rieke, Marcia J. Ho, Luis C. Sun, Yang Rieke, George H. Yuan, Feng Bakx, Tom J. L. C. Becker, George D. Yang, Jinyi Bañados, Eduardo Bischetti, Manuela Cain, Christopher Fan, Xiaohui Fudamoto, Yoshinobu Hashemi, Seyedazim Ikeda, Ryota Ji, Zhiyuan Jin, Xiangyu Liu, Weizhe Liu, Yichen Lyu, Jianwei Ma, Hai-Xia Takeuchi, Tsutomu T. Umehata, Hideki Wang, Feige Tee, Wei Leong Astrophysics of Galaxies Cosmology and Nongalactic Astrophysics Feedback from accreting supermassive black holes may regulate galaxy evolution, but statistical evidence linking nuclear winds to kiloparsec-scale cold gas outflows remains limited in the early universe. Here we report statistical evidence for such a connection in a sample of luminous quasars at $z \sim 5.5$. We compare stacked [C II] 158 $μ$m emission profiles from ALMA observations, which trace galactic-scale neutral gas, for quasars with and without broad absorption lines (BALs) that indicate powerful nuclear winds on sub-kiloparsec scales. A total of 5 BAL and 11 non-BAL quasar spectra are included in the stacking analysis. The BAL quasar stack exhibits a potential blueshifted broad component in the [C II] line profile, with a velocity offset of $Δv_{\rm b} = -2.1 \times 10^2\,\rm km\,s^{-1}$ and a full width at half maximum of $1.18 \times 10^3\,\rm km\,s^{-1}$, whereas the non-BAL stack shows no obvious broad component. Using a conservative ``clean-stack'' selection that excludes quasars with partial [C II] spectral coverage, the BAL broad residual is reduced to a hint-level feature. We estimate that up to a few percent to one-quarter of the nuclear wind energy may be transferred to cold neutral gas on kiloparsec scales. Although the sample size is limited, these results suggest a potential link between BAL winds and cold gas feedback in quasar host galaxies. These results provide empirical motivation for future tests of how multiphase outflows relate to the diversity of quasar host properties, including $M_{\rm BH}/M_*$. |
| title | A Potential Link between Nuclear Winds and Cold Gas Outflows on Kiloparsec Scales in Reionization-Era Quasars |
| topic | Astrophysics of Galaxies Cosmology and Nongalactic Astrophysics |
| url | https://arxiv.org/abs/2504.02305 |