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Arxiv: First results from the JWST Early Release Science Program Q3D: AGN photoionization and shock4 ionization in a red quasar at z = 0.45 Published: 10/29/2024 9:03:24 PM Updated: 10/29/2024 9:03:24 PM

Paper abstract: Red quasars, often associated with potent [OIII] outflows on both galacticand circumgalactic scales, may play a pivotal role in galactic evolution andblack hole feedback. In this work, we explore the [FeII] emission in one suchquasar at redshift z = 0.4352, F2M J110648.32+480712.3, using the integralfield unit (IFU) mode of the Near Infrared Spectrograph (NIRSpec) aboard theJames Webb Space Telescope (JWST). Our observations reveal clumpy [FeII] gaslocated to the south of the quasar. By comparing the kinematics of [FeII] and[OIII], we find that the clumpy [FeII] gas in the southeast and southwestaligns with the outflow, exhibiting similar median velocities up to v_50 ~ 1200km/s and high velocity widths W_80 > 1000 km/s. In contrast, the [FeII] gas tothe south shows kinematics inconsistent with the outflow, with W_80 ~ 500 km/s,significantly smaller than the [OIII] at the same location, suggesting that the[FeII] may be confined within the host galaxy. Utilizing standard emission-linediagnostic ratios, we map the ionization sources of the gas. According to theMAPPINGS III shock models for [FeII]/Pabeta, the regions to the southwest andsoutheast of the quasar are primarily photoionized. Conversely, the [FeII]emission to the south is likely excited by shocks generated by theback-pressure of the outflow on the galaxy disk, a direct signature of theimpact of the quasar on its host.