活动星系核光电离、射电喷流与恒星形成在z ~ 3.5射电星系4C +03.24中的相互作用
The interplay between active galactic nucleus photoionization, radio jet, and star formation in the z $\sim$ 3.5 radio galaxy 4C +03.24
- Zentrum für Astronomie der Universität Heidelberg（海德堡大学天文学中心）
- Caltech/IPAC（加州理工学院/IPAC）
- Universidade Federal do Rio Grande do Sul（南里奥格兰德联邦大学）
- Universidade Federal de Santa Maria（圣玛丽亚联邦大学）
- Florida Gulf Coast University（佛罗里达海湾海岸大学）
- The University of Queensland（昆士兰大学）
机构由 AI 辅助整理，请以论文原文为准。
AI总结：
该研究利用JWST/NIRSpec光谱分析z~3.5射电星系4C +03.24，揭示AGN光电离主导喷流轴电离，外流效率低，并探讨负反馈与喷流诱导恒星形成。
AI中文摘要：
高红移射电星系（HzRGs）是最强大的射电源之一，与红移z ≳ 1处最庞大的星系和致密环境相关联。它们是研究活动星系核（AGN）事件如何塑造星系演化的理想实验室，因为强烈的辐射、喷流和恒星形成同时被观测到。我们展示了4C +03.24系统的JWST/NIRSpec积分场光谱（空间分辨率约1.6 kpc），该系统是一个位于z ~ 3.5、热光度约为10^47.6 erg s^-1的强大HzRG。通过将发射线光谱分解为多个高斯分量，我们在温暖的（约10^4 K）电离气体中识别出运动学扰动区域，这对于避免高估外流性质至关重要。外流功率在距核约2 kpc处达到峰值，对应的低动力学耦合效率约为8_{-5}^{+7} × 10^-3%。对静止系光学和紫外（来自VLT/MUSE和HST成像）连续谱的联合分析揭示了一个延伸发射（跨度约14 kpc），我们将其解释为部分示踪恒星形成区域。凭借清晰的双极形态，我们表明AGN光电离主导了沿射电喷流轴方向的星际介质（ISM）电离。该区域中的[C II]λ158μm发射间隙可能是负反馈AGN的直接证据。我们还讨论了一种可能的情景，即4C +03.24可能位于一个经历多次星系相互作用的过密环境中，以及喷流诱导恒星形成的可能性。
英文摘要：
High-redshift radio galaxies (HzRGs) are among the most powerful radio sources, and are associated with the most massive galaxies and dense environments at redshifts z $\gtrsim$ 1. They are ideal laboratories for studying how active galactic nucleus (AGN) events can shape the evolution of galaxies, as intense radiation, jets, and star formation can be observed simultaneously in these galaxies. We present JWST/NIRSpec integral field spectroscopy ($\sim$ 1.6 kpc spatial resolution) of the 4C +03.24 system, a powerful HzRG at z $\sim$ 3.5 with a bolometric luminosity of $\sim 10^{47.6}$ erg s$^{-1}$. We identified kinematically disturbed regions in the warm ($\sim 10^4$ K) ionized gas by decomposing the emission-line spectra into multiple Gaussian components, which is crucial to avoid overestimating the outflow properties. The outflow power peaks at $\sim$ 2 kpc away from the nucleus, with a corresponding low kinetic coupling efficiency of $\sim 8_{-5}^{+7} \times 10^{-3}$ %. A combined analysis of the rest-frame optical and ultraviolet (from VLT/MUSE and HST imaging) continua revealed an extended emission (spanning $\sim$ 14 kpc), which we interpret as partially tracing star-forming regions. With a clearly delineated bipolar morphology, we show that the AGN photoionization dominates the ionization of the interstellar medium along the radio jet axis. The [C II]$λ$158$μ$m emission gap in this region might be direct evidence of negative AGN feedback. We also discuss a possible scenario where 4C +03.24 could be situated in an overdense environment experiencing multiple galaxy interactions and the possibility of jet-induced star-formation.
