Abstract

We present the results of our spectroscopic redshift measurements for galaxy clusters detected previously from Planck all-sky survey data as well as Sloan Digital Sky Survey and WISE all-sky survey data. The redshifts have been measured for 23 clusters, including four galaxy clusters from the second Planck catalogue of Sunyaev–Zeldovich sources. The main spectroscopic observations were carried out during 2019–early 2020 at the 1.6-m AZT-33IK telescope of the Sayan Observatory and the 1.5-m Russian–Turkish telescope (RTT-150). Some of the data have been obtained previously at the 3.5-m Calar Alto telescope. Out of the 23 clusters in this sample, 14 objects are located in the half of the sky where the rights to the data from the eROSITA sky survey onboard the SRG orbital X-ray observatory belong to the Russian side. All these clusters were detected with the eROSITA telescope in the course of the sky survey during 2020. On the whole, we have measured the spectroscopic redshifts for 220 galaxy clusters within our program of optical identifications of galaxy clusters from the Planck catalogue during several years. Many of them have already been detected in the SRG/eROSITA survey; a significant fraction of these objects are among the most massive galaxy clusters of the eROSITA sky survey and will most likely enter into cosmological samples of clusters from this survey.

中文翻译：

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普朗克调查和SRG / eROSITA调查中对这些星团的观测，对银河团的光谱进行红移测量

摘要

我们介绍了先前从普朗克全天候调查数据以及斯隆数字天巡和WISE全天候调查数据中检测到的星系团的光谱红移测量结果。已经测量了23个星团的红移，包括来自Sunyaev–Zeldovich来源的第二个普朗克目录的四个星系星团。主要的光谱观测是在2019年至2020年初在Sayan天文台的1.6米AZT-33IK望远镜和1.5米的俄罗斯-土耳其望远镜（RTT-150）上进行的。其中一些数据以前是在3.5米的Calar Alto望远镜上获得的。在此样本的23个星团中，有14个物体位于天空的一半，SRG轨道X射线天文台上的eROSITA天空测量数据的权利属于俄罗斯一方。在2020年的天空调查过程中，所有这些星团都使用eROSITA望远镜进行了探测。总体而言，我们已经在普朗克目录的星系团光学识别计划中对220个星系团的光谱红移进行了数年的测量。SRG / eROSITA调查中已经发现了许多。这些物体中有很大一部分属于eROSITA天空调查中质量最大的星系团，很可能会从该调查中进入宇宙学样本。SRG / eROSITA调查中已经发现了许多。这些物体中有很大一部分属于eROSITA天空调查中质量最大的星系团，很可能会从该调查中进入宇宙学样本。SRG / eROSITA调查中已经发现了许多。这些物体中有很大一部分属于eROSITA天空调查中质量最大的星系团，很可能会从该调查中进入宇宙学样本。