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arXiv 2207.09477astro-ph.GAastro-ph.CO
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CatWISE2020星表中活动星系核/类星体的成团性质

The clustering properties of AGNs/quasars in CatWISE2020 catalog

Prabhakar Tiwari, Gong-Bo Zhao, Adi Nusser

摘要:

我们研究了CatWISE 2020目录中1,307,530个活动星系核/类星体的聚类特性,这些目录是使用宽视场红外巡天探测器(WISE)和近地天体宽视场红外巡天探测器(NEOWISE)的巡天数据准备的。对于角动量$\ell \gtrapprox 10$($\lessapprox 18^\circ$)下降到非线性尺度,结果与标准的$Λ$ CDM宇宙学一致,星系偏差大致匹配的NRAO VLA巡天(NVSS)AGN。我们进一步研究了红外亮活动星系核的分数与恒星质量$f_{\rm IB} \sim M_*^{α_0 + α_1 z}$的红移关系,发现了$α_1=1.27^{+0.25}_{-0.30}$,在$\approx 4.6σ$置信水平上排除了非演化假说.结果与NVSS AGN获得的测量结果一致,尽管由于CatWISE 2020中物体的数量密度明显更高,因此更加精确。角标度$\approx 18^\circ$以上的过量偶极子和高聚集信号仍然异常。

英文摘要:

We study the clustering properties of 1,307,530 AGNs/quasars in the CatWISE2020 catalog prepared using the Wide-field Infrared Survey Explorer (WISE) and Near-Earth Object Wide-field Infrared Survey Explorer (NEOWISE) survey data. For angular moments $\ell \gtrapprox 10$ ($\lessapprox 18^\circ$) down to non-linear scales, the results are in agreement with the standard $Λ$CDM cosmology, with a galaxy bias roughly matching that of the NRAO VLA Sky Survey (NVSS) AGNs. We further explore the redshift dependence of the fraction of infrared bright AGNs on stellar mass, $f_{\rm IB} \sim M_*^{α_0 + α_1 z}$, and find $α_1=1.27^{+0.25}_{-0.30}$, ruling out a non-evolution hypothesis at $\approx 4.6σ$ confidence level. The results are consistent with the measurements obtained with NVSS AGNs, though considerably more precise thanks to the significantly higher number density of objects in CatWISE2020. The excess dipole and high clustering signal above angular scale $\approx 18^\circ$ remain anomalous.

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