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The role of host galaxy for the environmental dependence of active nuclei in local galaxies

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The role of host galaxy for the environmental dependence of active nuclei in local galaxies

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Título The role of host galaxy for the environmental dependence of active nuclei in local galaxies
Autor Davies, Richard I.
Hicks, Erin K. S.
Erwin, Peter
Burtscher, Leonard
Contursi, Alessandra
Genzel, Reinhard
Janssen, Annemieke
Koss, Michael
Lin, Ming-Yi
Lutz, Dieter
Maciejewski, Witold B.
Muller-Sanchez, Francisco
Orban de Xivry, Gilles
Ricci, Claudio
Riffel, Rogério
Riffel, Rogemar André
Rosario, David
Schartmann, Marc
Schnorr Müller, Allan
Shimizu, Taro
Sternberg, Amiel
Sturm, Eckhard
Storchi-Bergmann, Thaisa
Tacconi, Linda J.
Veilleux, Sylvain
Abstract 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.
Contido em Monthly notices of the Royal Astronomical Society. Oxford. Vol. 466, no. 4 (May 2017), p. 4917–4927
Assunto Buracos negros
Galáxias ativas
Galaxias seyfert
Nucleo galatico
[en] Galaxies: active
[en] Galaxies: haloes
[en] Galaxies: luminosity function, mass function
[en] Galaxies: nuclei
[en] Galaxies: Seyfert
Origem Estrangeiro
Tipo Artigo de periódico
URI http://hdl.handle.net/10183/168975
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