Abstract

The sensitivity of future far-infrared telescopes, such as Millimetron, will be limited by the confusion noise produced by distant galaxies. We have constructed a model of the cosmic infrared background whose main goal is to investigate the confusion noise parameters. The model is based on the publicly accessible eGALICS simulation. For each galaxy from the simulation we construct a model spectrum using the GRASIL and CHE_EVO codes, which allows the source counts, the background spectrum, and various parameters to be obtained. Our results are compared with the observational data and the predictions of other models. We conclude that our model reproduces the observational data with sufficient confidence. However, it is worth noting that the models predict various distributions of sources on the flux–redshift plane, especially at high \(z\). We have made confusion noise estimates based on the source counts (the source density criterion, the probability of deflection criterion, etc.) and model maps. A limited angular resolution of observations is shown to affect the source count curves and the confusion noise estimates. In contrast to other works in this field, we have obtained infrared background intensity maps and catalogs of model galaxies with realistic spectra suitable for studying the methods of struggling with the confusion effect.

中文翻译：

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Millimetron望远镜的河外背景和混乱噪声参数的估计

摘要

未来的远红外望远镜（例如Millimetron）的灵敏度将受到遥远星系产生的混乱噪声的限制。我们构建了宇宙红外背景模型，其主要目的是研究混乱噪声参数。该模型基于可公开访问的eGALICS模拟。对于模拟中的每个星系，我们使用GRASIL和CHE_EVO代码构建模型光谱，从而可以获取源计数，背景光谱和各种参数。我们的结果与观测数据和其他模型的预测进行了比较。我们得出的结论是，我们的模型具有足够的可信度来再现观测数据。但是，值得注意的是，这些模型预测了通量-红移平面上源的各种分布，特别是在高通量下。\（z \）。我们已经基于源计数（源密度标准，偏转标准的概率等）和模型图进行了混淆噪声估计。结果表明，有限的观测角分辨率会影响源计数曲线和混乱噪声估计。与该领域的其他工作相比，我们获得了具有真实光谱的红外背景强度图和模型星系目录，这些光谱适合于研究困扰效应的方法。