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arXiv 2005.13564astro-ph.CO
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在Hyper Suprime-Cam巡天中CAMIRA星系团到$z\approx1.1$的丰度-质量关系的基于聚类的自校准

A clustering-based self-calibration of the richness-to-mass relation of CAMIRA galaxy clusters out to $z\approx1.1$ in the Hyper Suprime-Cam survey

I-Non Chiu, Teppei Okumura, Masamune Oguri, Aniket Agrawal, Keiichi Umetsu, Yen-Ting Lin

备注：
Accepted for publication in the MNRAS. References to the figures are re-ordered. Add one more grant in the acknowledgement
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摘要：

通过模拟红移-空间两点相关函数，对CAMIRA星系团在红移$0.2\leq z<1.1$处的丰度-质量（$N$-$M$）关系进行了自校准.这些相关函数是CAMIRA星系团的$ξ_{\mathrm{cc}}$、BOSS巡天光谱观测到的CMASS星系的自相关函数$ξ_{\mathrm{gg}}$和这两个样本之间的互相关函数$ξ_{\mathrm{cg}}$。我们专注于约束规范化$N$ - $M$关系的前向建模方法，仔细考虑红移空间失真，上帝的手指效应，和光度红移的不确定性的CAMIRA集群。模型还考虑了投影效应对CAMIRA星系团晕偏置的影响。参数约束是无偏的，根据验证测试，使用一个大的模拟目录构造从N体模拟。在枢轴质量$M_{500}=10^{14}h^{-1}M_{\odot}$和枢轴红移$z_{\mathrm{piv}} = 0.6$处，通过建模$ξ_{\mathrm{cc}}$、$ξ_{\mathrm{cc}}+ξ_{\mathrm{cg}}$和$ξ_{\mathrm{cc}} + ξ_{\mathrm{cg}} + ξ_{\mathrm{gg}}$，将得到的归一化$A_{\mathrm{N}}$约束为$13.8^{+5.8}_{-4.2}$、$13.2^{+3.4}_{-2.7}$和$11.9^{+3.0}_{-1.9}$，平均不确定度分别为$36\%$、$23\%$和$21\%$。我们发现，由此产生的$A_{\mathrm{N}}$是统计上一致的那些独立获得的弱透镜放大，并从剪切和集群丰度的联合分析，在$\lesssim1.9σ$水平的一个较低的值的偏好。这意味着，从聚类推断的CAMIRA集群的绝对质量规模略高于那些独立的方法。[删节]

英文摘要：

We perform a self-calibration of the richness-to-mass ($N$-$M$) relation of CAMIRA galaxy clusters with richness $N\geq15$ at redshift $0.2\leq z<1.1$ by modeling redshift-space two-point correlation functions. These correlation functions are $ξ_{\mathrm{cc}}$ of CAMIRA clusters, the auto-correlation function $ξ_{\mathrm{gg}}$ of the CMASS galaxies spectroscopically observed in the BOSS survey, and the cross-correlation function $ξ_{\mathrm{cg}}$ between these two samples. We focus on constraining the normalization $A_{\mathrm{N}}$ of the $N$-$M$ relation in a forward-modeling approach, carefully accounting for the redshift-space distortion, the Finger-of-God effect, and the uncertainty in photometric redshifts of CAMIRA clusters. The modeling also takes into account the projection effect on the halo bias of CAMIRA clusters. The parameter constraints are shown to be unbiased according to validation tests using a large set of mock catalogs constructed from N-body simulations. At the pivotal mass $M_{500}=10^{14}h^{-1}M_{\odot}$ and the pivotal redshift $z_{\mathrm{piv}} = 0.6$, the resulting normalization $A_{\mathrm{N}}$ is constrained as $13.8^{+5.8}_{-4.2}$, $13.2^{+3.4}_{-2.7}$, and $11.9^{+3.0}_{-1.9}$ by modeling $ξ_{\mathrm{cc}}$, $ξ_{\mathrm{cc}}+ξ_{\mathrm{cg}}$, and $ξ_{\mathrm{cc}} + ξ_{\mathrm{cg}} + ξ_{\mathrm{gg}}$, with average uncertainties at levels of $36\%$, $23\%$, and $21\%$, respectively. We find that the resulting $A_{\mathrm{N}}$ is statistically consistent with those independently obtained from weak-lensing magnification and from a joint analysis of shear and cluster abundance, with a preference for a lower value at a level of $\lesssim1.9σ$. This implies that the absolute mass scale of CAMIRA clusters inferred from clustering is mildly higher than those from the independent methods. [abridged]

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