This paper presents an algorithm for generating temperature and polarization maps that have the best features of both Planck and ACT: Planck's nearly white noise on intermediate and large angular scales and ACT's high-resolution and sensitivity on small angular scales. We use this approach to combine data from the 2008--2018 ACT observing seasons with the full Planck maps to generate temperature and polarization maps that cover over 18,000 square degrees, nearly half the full sky, at 100, 150 and 220 GHz. The maps reveal 4,000 optically-confirmed clusters through the Sunyaev Zel'dovich effect (SZ) and 18,500 point source candidates at $> 5\sigma$, the largest single collection of SZ clusters and millimeter wave sources to date. The multi-frequency maps provide millimeter images of nearby galaxies and individual Milky Way nebulae, and even clear detections of several nearby stars. Other anticipated uses of these maps include, for example, thermal SZ and kinematic SZ cluster stacking, CMB cluster lensing and galactic dust science. However, due to the preliminary nature of some of the component data sets, we caution that these maps should not be used for precision cosmological analysis. The maps will be made available on LAMBDA no later than three months after the journal publication of this article.

中文翻译：

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阿塔卡马宇宙学望远镜：来自 ACT 2008-2018 数据结合普朗克的 18000 平方度微波天空的弧分分辨率图

本文提出了一种生成温度图和偏振图的算法，该算法具有普朗克和 ACT 的最佳特征：普朗克在中等和大角尺度上的近乎白噪声和 ACT 在小角尺度上的高分辨率和灵敏度。我们使用这种方法将 2008--2018 年 ACT 观测季节的数据与完整的普朗克地图相结合，以生成覆盖超过 18,000 平方度，几乎是整个天空的一半，在 100、150 和 220 GHz 的温度和偏振图。这些地图通过 Sunyaev Zel'dovich 效应 (SZ) 揭示了 4,000 个光学确认的星团和 $> 5\sigma$ 的 18,500 个候选点源，这是迄今为止最大的 SZ 星团和毫米波源的单一集合。多频图提供了附近星系和单个银河系星云的毫米图像，甚至可以清楚地探测到附近的几颗恒星。这些地图的其他预期用途包括，例如，热 SZ 和运动 SZ 集群堆叠、CMB 集群透镜和银河尘埃科学。然而，由于一些组成数据集的初步性质，我们警告这些地图不应该用于精确的宇宙学分析。这些地图将在本文发表后三个月内在 LAMBDA 上提供。