JWST Q3D Program: active galactic nucleus photoionization and shock ionization in a red quasar at z = 0.4
Red quasars, often associated with potent [O iii] outflows on both galactic and circumgalactic scales, may play a pivotal role in galactic evolution and black hole feedback. In this work, we explore the [Fe ii] emission in one such quasar at z = 0.4352-F2M J110648.32+480712.3 using the integral fiel...
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| Main Authors: | , , , , , , , , , , , , , , |
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| Format: | Article (Journal) |
| Language: | English |
| Published: |
2025 September 30
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| In: |
The astrophysical journal
Year: 2025, Volume: 991, Issue: 2, Pages: 1-13 |
| ISSN: | 1538-4357 |
| DOI: | 10.3847/1538-4357/adf967 |
| Online Access: | Verlag, kostenfrei, Volltext: https://doi.org/10.3847/1538-4357/adf967 Verlag, kostenfrei, Volltext: https://iopscience.iop.org/article/10.3847/1538-4357/adf967 
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| Author Notes: | Swetha Sankar, Nadia L. Zakamska, David S. N. Rupke, Weizhe Liu, Dominika Wylezalek, Sylvain Veilleux, Caroline Bertemes, Nadiia Diachenko, Yu-Ching Chen, Yuzo Ishikawa, Andrey Vayner, Nicole P. H. Nesvadba, Guilin Liu, Andy D. Goulding, and Dieter Lutz |
| Summary: | Red quasars, often associated with potent [O iii] outflows on both galactic and circumgalactic scales, may play a pivotal role in galactic evolution and black hole feedback. In this work, we explore the [Fe ii] emission in one such quasar at z = 0.4352-F2M J110648.32+480712.3 using the integral field unit mode of the Near Infrared Spectrograph aboard the JWST. Our observations reveal clumpy [Fe ii] gas located to the south of the quasar. By comparing the kinematics of [Fe ii] and [O iii], we find that the clumpy [Fe ii] gas in the southeast and southwest aligns with the outflow, exhibiting similar median velocities up to v50 = 1200 km s−1 and high velocity widths W80 > 1000 km s−1. In contrast, the [Fe ii] gas to the south shows kinematics inconsistent with the outflow, with W80 ∼ 500 km s−1, significantly smaller than the [O iii] at the same location, suggesting that the [Fe ii] may be confined within the host galaxy. Utilizing standard emission-line diagnostic ratios, we map the ionization sources of the gas. According to the MAPPINGS III shock models for [Fe ii]/Paβ, the regions to the southwest and southeast of the quasar are primarily photoionized. Conversely, the [Fe ii] emission to the south is likely excited by shocks generated by the back-pressure of the outflow on the galaxy disk, a direct signature of the impact of the quasar on its host. |
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| Item Description: | Gesehen am 09.04.2026 |
| Physical Description: | Online Resource |
| ISSN: | 1538-4357 |
| DOI: | 10.3847/1538-4357/adf967 |