Halo Occupation Distributions of Moderate X-ray AGNs through Major and Minor Mergers in a $Λ$-CDM Cosmology

L. Altamirano-Dévora, T. Miyaji, H. Aceves, A. Castro, R. Cañas, F. Tamayo

Published 2015-10-10Version 1

Motivated by recent inferred form of the halo occupation distribution (HOD) of X-ray selected AGNs, in the COSMOS field by Allevato et al. (2012), we investigate the HOD properties of moderate X-ray luminosity Active Galactic Nuclei (mXAGNs) using a simple model based on merging activity between dark matter halos (DMHs) in a $\Lambda$-CDM cosmology. The HODs and number densities of the simulated mXAGNs at $z=0.5$, under the above scenarios to compare with Allevato et al. (2012) results. We find that the simulated HODs of major and minor mergers, and the observed for mXAGNs are consistent among them. Our main result is that minor mergers, contrary to what one might expect, can play an important role in activity mAGNs.