The dependence of the X-ray AGN clustering on the properties of the host galaxy

Abstract

We study the clustering dependence of X-ray AGN and normal galaxies on the stellar mass (M${}_{\star }$), star-formation rate (SFR) and specific star-formation rate (sSFR) of the (host) galaxy. Towards this end, we use 407 X-ray AGN from the XMM-XXL survey ($\sim$ 25 deg${}^2$ in the North) and $\sim 45,000$ galaxies in the VIPERS field (W1: $\sim$16 deg${}^2$). We match the AGN and galaxy samples to have the same M${}_{\star }$, SFR and redshift distributions. Based on our results, the two populations live in DMHs with similar mass ($\log M/(M_{\odot }{h}^{-1})\approx 12.8$) and have similar dependence on the galaxy properties. Specifically, our measurements show a positive dependence of the AGN and galaxy clustering on M${}_{\star }$ and a negative dependence on SFR and sSFR. We also find that the X-ray clustering is independent of the location of the host galaxy above or below the star-forming main sequence.

MNRAS accepted, 15 pages, 13 figures, 9 Tables

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• Semi-analytic modelling of AGNs: auto-correlation function and halo occupation
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• Probing star formation rates and histories in AGN and non-AGN galaxies across diverse cosmic environments and extensive X-ray luminosity ranges
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• XXL-HSC: Host properties of X-ray detected AGNs in XXL clusters
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• Large-scale environments of star-forming active galactic nuclei: How black hole mass, accretion rate, and luminosity connect to dark matter halos
• Identification of high-redshift X-ray active galactic nuclei in the 4XMM-DR11 serendipitous catalogue using DES data: Comparative analysis with optically-selected QSOs
• Black hole mass, host galaxy mass, and dark matter halos: Testing the environmental connection