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Masses of Sunyaev-Zel’dovich galaxy clusters detected by the Atacama Cosmology Telescope: Stacked lensing measurements with Subaru HSC year 3 data
Physical Review D ( IF 4.6 ) Pub Date : 2024-11-08 , DOI: 10.1103/physrevd.110.103006
Masato Shirasaki, Cristóbal Sifón, Hironao Miyatake, Erwin Lau, Zhuowen Zhang, Neta Bahcall, Nicholas Battaglia, Mark Devlin, Jo Dunkley, Arya Farahi, Matt Hilton, Yen-Ting Lin, Daisuke Nagai, Suzanne T. Staggs, Tomomi Sunayama, David Spergel, Edward J. Wollack

We present a stacked lensing analysis of 96 galaxy clusters selected by the thermal Sunyaev-Zel’dovich (SZ) effect in maps of the cosmic microwave background (CMB). We select foreground galaxy clusters with a 5𝜎-level SZ threshold in CMB observations from the Atacama Cosmology Telescope, while we define background source galaxies for the lensing analysis with secure photometric redshift cuts in Year 3 data of the Subaru Hyper Suprime Cam survey. We detect the stacked lensing signal in the range of 0.1<𝑅[1Mpc]<100 in each of three cluster redshift bins, 0.092<𝑧0.445, 0.445<𝑧0.695, and 0.695<𝑧1.180, with 32 galaxy clusters in each bin. The cumulative signal-to-noise ratios of the lensing signal are 14.6, 12.0, and 6.6, respectively. Using a halo-based forward model, we then constrain statistical relationships between the mass inferred from the SZ observation (i.e. SZ mass) and the total mass derived from our stacked lensing measurements. At the average SZ mass in the cluster sample (2.12.4×10141𝑀), our likelihood analysis shows that the average total mass differs from the SZ counterpart by a factor of 1.3±0.2, 1.6±0.2, and 1.6±0.3 (68%) in the aforementioned redshift ranges, respectively. Our limits are consistent with previous lensing measurements, and we find that the cluster modeling choices can introduce a 1𝜎-level difference in our parameter inferences.

中文翻译:


阿塔卡马宇宙学望远镜探测到的 Sunyaev-Zel'dovich 星系团的质量:使用斯巴鲁 HSC 第 3 年数据的堆叠透镜测量



我们提出了在宇宙微波背景 (CMB) 图中由 Sunyaev-Zel'dovich (SZ) 热效应选择的 96 个星系团的堆叠透镜分析。我们在阿塔卡马宇宙学望远镜的 CMB 观测中选择了具有 级 SZ 阈值的前景星系团,同时我们在斯巴鲁 Hyper Suprime Cam 巡天第 3 年的数据中定义了具有安全光度红移切割的背景源星系进行透镜分析。我们在三个星系团红移区间(0.092<z≤0.4450.445<z≤0.6950.695<z≤1.180)中分别检测到 0.1<R[h−1 Mpc]<100 范围内的堆叠透镜信号,每个区间中有 32 个星系团。透镜信号的累积信噪比分别为 14.6、12.0 和 6.6。然后,使用基于光晕的正向模型,我们约束从 SZ 观测推断的质量(即 SZ 质量)与从堆叠透镜测量得出的总质量之间的统计关系。在星团样本的平均 SZ 质量 (2.1−2.4×1014h−1M⊙) 下,我们的似然分析表明,在上述红移范围内,平均总质量与 SZ 对应物的差异分别为 1.3±0.21.6±0.21.6±0.3 (68%)。我们的限制与之前的透镜测量一致,我们发现集群建模选择可以在我们的参数推断中引入 级的差异。
更新日期:2024-11-08
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