AI 中文总结
研究利用PhotoIFU工作流程，将深度多波段成像用于低分辨率光度积分场单元，对三个特定星系进行逐像素SED拟合，绘制相关属性地图，发现外流和扩展发射线结构与宿主星系属性差异有关，为反馈结构SED映射提供成像方法。
AI 中文摘要
我们提出了PhotoIFU，一种将深度多波段成像用作低分辨率光度积分场单元的工作流程。应用于与点扩展函数匹配的詹姆斯·韦布空间望远镜/近红外相机成像时，PhotoIFU将每个空间像素视为一个粗略的光谱能量分布（SED）元素，并用Prospector拟合像素SED，以绘制分辨出的恒星种群和与星际介质相关的属性。我们将此方法应用于JADES中红移为1.3至3.7的三个星系：两个具有扩展电离线发射的系统和一个具有异常强烈中性外流的星爆后星系。逐像素SED拟合给出了恒星质量表面密度、特定恒星形成率、尘埃消光、气相金属丰度和近期恒星形成历史的地图。我们发现，与整个宿主星系相比，从扩展发射或外流几何结构中选择的区域占据分辨出的SED属性分布的不同部分。在具有扩展电离发射的系统中，这些区域通常尘埃较少，这与沿着宿主星系中尘埃较少、低柱密度路径观测到的电离发射一致。在中性外流系统中，选定区域显示近期恒星形成增强，这表明紧凑的年轻化可能标志着早期高能阶段的后果。这些结果表明，星系外流和扩展发射线结构在空间上可能与分辨出的宿主星系恒星种群和与星际介质相关属性的可测量差异相关联。PhotoIFU为在无法进行全光谱积分场映射的更大星系样本中，对与反馈相关结构进行分辨SED映射提供了一种基于成像的方法。
英文摘要
We present PhotoIFU, a workflow that uses deep multi-band imaging as a low-resolution photometric integral field unit. Applied to PSF-matched JWST/NIRCam imaging, PhotoIFU treats each spatial pixel as a coarse SED element and fits the pixel SEDs with Prospector to map resolved stellar-population and ISM-related properties. We apply this approach to three galaxies at $z=1.3$--3.7 in JADES: two systems with extended ionized line emission and one post-starburst galaxy with an exceptionally strong neutral outflow. Pixel-by-pixel SED fitting gives maps of stellar-mass surface density, specific star formation rate, dust attenuation, gas-phase metallicity, and recent star-formation history. We find that regions selected from the extended-emission or outflow geometry occupy distinct parts of the resolved SED-property distribution compared with the full host. In the systems with extended ionized emission, these regions are generally less dusty, consistent with ionized emission being observed along dust-poor, low-column-density pathways through the host. In the neutral-outflow system, the selected regions show enhanced recent star formation, suggesting that compact rejuvenation may mark the aftermath of an earlier energetic phase. These results show that galactic outflows and extended emission-line structures can be spatially associated with measurable differences in resolved host-galaxy stellar populations and ISM-related properties. PhotoIFU provides an imaging-based method for resolved SED mapping of feedback-related structures in larger galaxy samples where full spectroscopic integral-field mapping is unavailable.
Comments22 pages. Submitted to ApJ. The code will be made publicly available
