AI 中文总结
本文对eFEDS X射线巡天的138个星系团开展90GHz MUSTANG2成像，探测到11个离散源，据此估算tSZ巡天因这类源导致4.5%的星系团被遗漏，多数未被ACT探测的96个星系团源于噪声和X射线质量高估。
AI 中文摘要
本文呈现了对eFEDS X射线巡天中138个星系团内致密源的盲巡天结果，其中96个为新观测目标。这些目标的X射线质量估计值和红移在形式上使其超出了阿塔卡马宇宙学望远镜（ACT, DR5）的热苏尼亚耶夫-泽尔多维奇效应（tSZ）巡天极限，但未被探测到。位置接近星系团中心（<104
英文摘要
In this paper, we present the results of a blind survey for compact sources in 138 galaxy clusters from the eFEDS X-ray survey. Of these clusters, 96 are new observations. These targets have X-ray mass estimates and redshifts that formally place them above the thermal Sunyaev-Zel'dovich effect (tSZ) survey limits from the Atacama Cosmology Telescope (ACT, DR5), yet were not detected. Compact sources with apparent locations close to (<104") the center of a galaxy cluster can in-fill the tSZ flux decrement, resulting in tSZ surveys missing clusters. To quantify the number of missing clusters from ACT, we carried out a survey at 90GHz using MUSTANG2 on the Green Bank Telescope and achieved a 5-sigma detection limit of 1mJy in the center of each cluster. We detected 11 discrete sources, which when scaled, is slightly lower than our previous tSZ selected sample, M2-ACT (8.0% vs 9.9%). All had radio counterparts. However, unlike the M2-ACT sample, the sources in X-ray selected clusters were concentrated closer to the cluster centers. When their effect on the measured tSZ signal is taken into account the sources we found would result in 4.5% of clusters being missed by tSZ surveys - a result similar to the estimate in recent ACT results. Most of the 96 clusters in eFEDS but not in ACT are a result of noise and overestimation of mass from X-ray measurements.
Comments9 pages, 6 figures, & 2 tables in main document, Figures 4 and table 1 reproduced in full in the appendix - pages 10 to 16. Submitted to ApJ
