GATOS：利用空间分辨的JWST光谱揭示活动星系核中心区的不同反馈模式
GATOS: Distinct Feedback Modes in AGN Central Regions Revealed by Spatially Resolved JWST Spectroscopy
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中文总结 AI 辅助
本研究利用JWST对五个不同光度AGN的中心区进行空间分辨光谱观测，揭示辐射与动力学两种AGN反馈模式共同抑制核区PAH发射，为校准AGN中PAH发射的恒星形成率及量化AGN反馈奠定基础。
中文摘要 AI 辅助
本论文呈现了JWST MIRI/MRS对五个活动星系核（AGN）中心r≈40-240 pc区域的观测结果，这些AGN的光度范围较宽（log L_bol/erg·s⁻¹≈39.8-43.8）。结合多环芳烃（PAHs）、分子氢（H₂）和电离气体的多相诊断，在约4-24 pc的空间尺度上，本研究对两种不同的AGN反馈模式——辐射模式和动力学模式——对周围介质的影响展开了空间分辨研究。结果表明，分别与AGN辐照和激波处理相关的这两种反馈模式，共同导致了研究目标核区PAH发射的相对抑制。此外，这两种AGN反馈模式的共存，尤其是与喷流或外流相关的激波处理，在AGN中心区自然解释了研究目标中观测到的PAH带比值的双峰分布，以及文献中报道的看似不同的结果。尽管基于有限样本，这些发现为从AGN中的PAH发射校准恒星形成率（SFR）提供了新见解，更重要的是，为JWST时代诊断和量化AGN反馈的实用框架奠定了基础。
英文摘要
This manuscript presents JWST MIRI/MRS observations of the central $r \approx 40-240$ pc regions of five active galactic nuclei (AGN) spanning a wide range of luminosities (${\rm log}\,L_{\rm bol}/{\rm erg\,s^{-1}} \approx 39.8-43.8$). Combining multiphase diagnostics from polycyclic aromatic hydrocarbons (PAHs), molecular hydrogen (H$_2$), and ionized gas at spatial scales of $\sim 4-24$ pc, this study presents a spatially resolved investigation into the effects of the two distinct AGN feedback modes--radiative and kinetic--on the surrounding medium. The results indicate that these two feedback modes, associated with AGN irradiation and shock processing, respectively, collectively drive the relative suppression of PAH emission in the nuclear regions of the targets studied here. Moreover, the coexistence of these two AGN feedback modes, especially the shock processing associated with either jets or outflows, in the central regions of AGN naturally explains both the bimodal distribution of PAH band ratios observed in the targets studied here and the seemingly disparate results reported in the literature. Although based on a limited sample, these findings provide new insights into calibrating star-formation rates (SFRs) from PAH emission in AGN, and more importantly, lay the groundwork for a practical framework to diagnose and quantify AGN feedback in the JWST era.
