标题： JWST/MIRI模拟成像：对深场巡天中遥远星系的隐匿恒星形成和活动星系核的见解 显示英文标题

标题： JWST/MIRI Simulated Imaging: Insights into Obscured Star-Formation and AGN for Distant Galaxies in Deep Surveys

摘要： 詹姆斯·韦布空间望远镜MIRI仪器将在中红外波段以前所未有的灵敏度和角分辨率革新河外天文学。 在这里，我们评估MIRI测光在宇宙演化早期释放科学（CEERS）调查中约束星系特性的潜力。 我们从落在计划的MIRI指向区域的真实源的光谱能量分布（SEDs）中推导出估计的MIRI流量。 我们还获得假设的AGN-星系混合模型的MIRI流量，变化AGN对总红外光度的贡献比例（$\rm frac_{AGN}$）。 基于这些模型流量，我们使用MIRISIM在6个波段（从F770W到F2100W）模拟CEERS成像（3.6小时曝光），并使用JWST PIPELINE减少这些数据。 我们使用TPHOT进行PSF匹配测光，并用X-CIGALE拟合源SEDs，同时建模光度红移和其他物理特性。 添加MIRI数据后，所有在$z\lesssim 3$处的源的红移和$\rm frac_{AGN}$的准确性通常提高了$\gtrsim 2$倍。 值得注意的是，对于纯星系输入（$\rm frac_{AGN}=0$），由于MIRI的存在，$\rm frac_{AGN}$的准确性提高了$\sim 100$倍。 模拟的CEERS MIRI数据基于经验的$L_{\rm X}$-$L_{\rm 6\mu m}$关系，比最深的X射线调查对AGN检测更敏感。 与X射线观测类似，MIRI也可以用来限制AGN吸积功率（准确度$\approx 0.3$dex）。 我们的工作表明，MIRI将能够对星系形成和AGN的中红外光度施加强烈的约束，从而促进对星系/AGN共同演化的研究。 显示英文摘要

摘要： The JWST MIRI instrument will revolutionize extragalactic astronomy with unprecedented sensitivity and angular resolution in mid-IR. Here, we assess the potential of MIRI photometry to constrain galaxy properties in the Cosmic Evolution Early Release Science (CEERS) survey. We derive estimated MIRI fluxes from the spectral energy distributions (SEDs) of real sources that fall in a planned MIRI pointing. We also obtain MIRI fluxes for hypothetical AGN-galaxy mixed models varying the AGN fractional contribution to the total IR luminosity ($\rm frac_{AGN}$). Based on these model fluxes, we simulate CEERS imaging (3.6-hour exposure) in 6 bands from F770W to F2100W using MIRISIM, and reduce these data using JWST PIPELINE. We perform PSF-matched photometry with TPHOT, and fit the source SEDs with X-CIGALE, simultaneously modeling photometric redshift and other physical properties. Adding the MIRI data, the accuracy of both redshift and $\rm frac_{AGN}$ is generally improved by factors of $\gtrsim 2$ for all sources at $z\lesssim 3$. Notably, for pure-galaxy inputs ($\rm frac_{AGN}=0$), the accuracy of $\rm frac_{AGN}$ is improved by $\sim 100$ times thanks to MIRI. The simulated CEERS MIRI data are slightly more sensitive to AGN detections than the deepest X-ray survey, based on the empirical $L_{\rm X}$-$L_{\rm 6\mu m}$ relation. Like X-ray observations, MIRI can also be used to constrain the AGN accretion power (accuracy $\approx 0.3$ dex). Our work demonstrates that MIRI will be able to place strong constraints on the mid-IR luminosities from star formation and AGN, and thereby facilitate studies of the galaxy/AGN co-evolution.