基于SPT-3G主巡天5年数据通过苏尼亚耶夫-泽尔多维奇效应选择的星系团
宇宙学与河外天体物理
2026-07-01 v1 星系天体物理
摘要
我们报告了一个新的星系团目录，该目录使用热苏尼亚耶夫-泽尔多维奇（SZ）效应，从SPT-3G主天区5年的观测中选择。样本来自角分分辨率数据，在95、150和220 GHz的白噪声水平分别为3.2、2.5和8.9 μK-arcmin，由8,892个显著性ξ=4以上的星系团候选体组成，预期纯度>82%（ξ≥5时有4,480个，纯度>99%）。使用光学和红外数据，我们已确认7,190个候选体为星系团。样本的质量范围为7.9 × 10^13 M_⊙/h_70 < M_500c < 1.6 × 10^15 M_⊙/h_70，中位质量为1.65 × 10^14 M_⊙/h_70，红移范围为0.037<z≲2，中位红移为z_med = 0.73；1,780个星系团位于z>1，271个位于z>1.5。与之前来自南极望远镜和阿塔卡马宇宙学望远镜数据的SZ星系团样本相比，SPT-3G样本在质量和红移上高度一致，但深度显著增加，每个星系团的探测信噪比高2-4倍，星系团密度为4.5个确认星系团/平方度。我们与eRASS1星系团和点源目录进行交叉匹配，分别找到1,279和1,319个匹配。SPT和eROSITA的星系团质量估计相对一致。我们使用内部数据分割和与外部样本的比较进行了一系列验证检查。这些测试显示，相关（尘埃）发射随红移增加，z~1.5的星系团在220 GHz的温度增量比z~0.25大约17倍，但相关同步辐射的证据较弱。最后，一些星系团被标记为强引力透镜候选体。
引用
@article{arxiv.2607.01175,
title = {Galaxy Clusters Selected via the Sunyaev-Zel'dovich Effect in 5 year data from the SPT-3G Main Survey},
author = {L. E. Bleem and M. Klein and K. Kornoelje and S. Bocquet and J. A. Sobrin and M. Aguena and E. Anderes and A. J. Anderson and F. Andrade-Oliveira and B. Ansarinejad and M. Archipley and L. Balkenhol and D. R. Barron and P. S. Barry and M. Bayliss and K. Benabed and A. N. Bender and B. A. Benson and F. Bianchini and F. R. Bouchet and D. Brooks and D. L. Burke and M. Calzadilla and R. Camilleri and E. Camphuis and M. G. Campitiello and J. E. Carlstrom and A. Carnero Rosell and J. Carretero and J. Carron and C. L. Chang and P. M. Chichura and A. Chokshi and T. -L. Chou and A. Coerver and M. Costanzi and T. M. Crawford and L. N. da Costa and C. Daley and T. M. Davis and T. de Haan and J. De Vicente and S. Desai and K. R. Dibert and H. T. Diehl and M. A. Dobbs and M. Doohan and D. Dutcher and S. Everett and G. Evrard and C. Feng and K. R. Ferguson and N. C. Ferree and K. Fichman and B. Flaugher and B. Floyd and K. Fosdick and A. Foster and S. Galli and A. E. Gambrel and A. K. Gao and J. García-Bellido and F. Ge and M. D. Gladders and S. Grandis and F. Guidi and S. Guns and G. Gutierrez and N. W. Halverson and S. R. Hinton and E. Hivon and G. P. Holder and D. L. Hollowood and W. L. Holzapfel and J. C. Hood and A. Hryciuk and N. Huang and T. Jhaveri and S. Kent and F. Kéruzoré and A. R. Khalife and G. Khullar and L. Knox and K. Kuehn and C. -L. Kuo and O. Lahav and K. Levy and Y. Li and A. E. Lowitz and C. Lu and G. P. Lynch and T. J. Maccarone and G. Mahler and A. S. Maniyar and J. L. Marshall and E. S. Martsen and M. McDonald and J. Mena-Fernández and F. Menanteau and M. Millea and R. Miquel and J. J. Mohr and J. Montgomery and J. Myles and Y. Nakato and T. Natoli and R. C. Nichol and V. Novosad and R. L. C. Ogando and Y. Omori and A. Ouellette and Z. Pan and K. A. Phadke and A. A. Plazas Malagón and A. W. Pollak and A. Porredon and K. Prabhu and J. Prat and W. Quan and S. Raghunathan and M. Rahimi and A. Rahlin and C. L. Reichardt and A. K. Romer and M. Rouble and J. E. Ruhl and E. Sanchez and D. Sanchez Cid and T. Schrabback and I. Sevilla-Noarbe and A. C. Silva Oliveira and A. Simpson and T. Somboonpanyakul and A. A. Stark and E. Suchyta and M. E. C. Swanson and C. Tandoi and C. To and C. Trendafilova and J. D. Vieira and A. G. Vieregg and V. Vikram and A. Vitrier and Y. Wan and N. Weaverdyck and J. Weller and N. Whitehorn and W. L. K. Wu and M. R. Young and J. A. Zebrowski and J. Zhan},
journal= {arXiv preprint arXiv:2607.01175},
year = {2026}
}
备注
Cluster sample online available at https://pole.uchicago.edu/public/data/spt3g-clusters/