Facial reconstruction

Search LJMU Research Online

Browse Repository | Browse E-Theses

The Role of Host Galaxy for the Environmental Dependence of Active Nuclei in Local Galaxies

Davies, RI, Hicks, EKS, Erwin, P, Burtscher, L, Contursi, A, Genzel, R, Janssen, A, Koss, M, Lin, M-Y, Lutz, D, Maciejewski, W, Müller-Sánchez, F, Orban de Xivry, G, Ricci, C, Riffel, R, Riffel, RA, Rosario, D, Schartmann, M, Schnorr-Müller, A, Shimizu, T , Sternberg, A, Sturm, E, Storchi-Bergmann, T, Tacconi, L and Veilleux, S (2017) The Role of Host Galaxy for the Environmental Dependence of Active Nuclei in Local Galaxies. Monthly Notices of the Royal Astronomical Society, 466 (4). pp. 4917-4927. ISSN 0035-8711

stx045.pdf - Published Version

Download (854kB) | Preview


We discuss the environment of local hard X-ray selected active galaxies, with reference to two independent group catalogues. We find that the fraction of these AGN in S0 host galaxies decreases strongly as a function of galaxy group size (halo mass) – which contrasts with the increasing fraction of galaxies of S0 type in denser environments. However, there is no evidence for an environmental dependence of AGN in spiral galaxies. Because most AGN are found in spiral galaxies, this dilutes the signature of environmental dependence for the population as a whole. We argue that the differing results for AGN in disc-dominated and bulge-dominated galaxies are related to the source of the gas fuelling the AGN, and so may also impact the luminosity function, duty cycle and obscuration. We find that there is a significant difference in the luminosity function for AGN in spiral and S0 galaxies, and tentative evidence for some difference in the fraction of obscured AGN.

Item Type: Article
Additional Information: This article has been accepted for publication in Monthly Notices of the Royal Astronomical Society ©: 2017 The Authors Published by Oxford University Press on behalf of the Royal Astronomical Society. All rights reserved.
Uncontrolled Keywords: 0201 Astronomical And Space Sciences
Subjects: Q Science > QB Astronomy
Q Science > QC Physics
Divisions: Astrophysics Research Institute
Publisher: Oxford University Press
Date Deposited: 06 Jun 2017 11:43
Last Modified: 30 Mar 2022 08:28
DOI or ID number: 10.1093/mnras/stx045
URI: https://researchonline.ljmu.ac.uk/id/eprint/6648
View Item View Item