English

The clustering properties of AGNs/quasars in CatWISE2020 catalog

Astrophysics of Galaxies 2023-02-09 v3 Cosmology and Nongalactic Astrophysics

Abstract

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 10\ell \gtrapprox 10 (18\lessapprox 18^\circ) down to non-linear scales, the results are in agreement with the standard Λ\LambdaCDM 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, fIBMα0+α1zf_{\rm IB} \sim M_*^{\alpha_0 + \alpha_1 z}, and find α1=1.270.30+0.25\alpha_1=1.27^{+0.25}_{-0.30}, ruling out a non-evolution hypothesis at 4.6σ\approx 4.6\sigma 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 18\approx 18^\circ remain anomalous.

Keywords

Cite

@article{arxiv.2207.09477,
  title  = {The clustering properties of AGNs/quasars in CatWISE2020 catalog},
  author = {Prabhakar Tiwari and Gong-Bo Zhao and Adi Nusser},
  journal= {arXiv preprint arXiv:2207.09477},
  year   = {2023}
}

Comments

11 pages, 11 figures