Tracing the evolution of active galactic nuclei host galaxies over the last 9 Gyr of cosmic time
Articolo
Data di Pubblicazione:
2014
Abstract:
We present the results of a combined galaxy population analysis for the host galaxies of active galactic nuclei (AGN) identified at 0 < z < 1.4 within the Sloan Digital Sky Survey, Boötes, and DEEP2 surveys. We identified AGN in a uniform and unbiased manner at X-ray, infrared, and radio wavelengths. Supermassive black holes undergoing radiatively efficient accretion (detected as X-ray and/or infrared AGN) appear to be hosted in a separate and distinct galaxy population than AGN undergoing powerful mechanically dominated accretion (radio AGN). Consistent with some previous studies, radiatively efficient AGN appear to be preferentially hosted in modest star-forming galaxies, with little dependence on AGN or galaxy luminosity. AGN exhibiting radio-emitting jets due to mechanically dominated accretion are almost exclusively observed in massive, passive galaxies. Crucially, we now provide strong evidence that the observed host-galaxy trends are independent of redshift. In particular, these different accretion-mode AGN have remained as separate galaxy populations throughout the last 9 Gyr. Furthermore, it appears that galaxies hosting AGN have evolved along the same path as galaxies that are not hosting AGN with little evidence for distinctly separate evolution.
Tipologia CRIS:
03A-Articolo su Rivista
Keywords:
galaxies: active; galaxies: evolution; galaxies: statistics; infrared: galaxies; radio continuum: galaxies; surveys; X-rays: galaxies; Astronomy and Astrophysics; Space and Planetary Science
Elenco autori:
Goulding, A. D.; Forman, W. R.; Hickox, R. C.; Jones, C.; Murray, S. S.; Paggi, A.; Ashby, M. L. N.; Coil, A. L.; Cooper, M. C.; Huang, J. -. S.; Kraft, R.; Newman, J. A.; Weiner, B. J.; Willner, S. P.
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