AGN-Host Galaxy Connection: Morphology and Colours of X-ray Selected AGN at z < 2
The connection between AGN and their host galaxies has been widely
studied over recent years, showing it to be of great importance for
providing answers to some fundamental questions related with AGN fueling
mechanisms, their formation and evolution. Using X-ray and one of the
deepest broad-band optical data sets, we studied morphology and colours
in relationship with X-ray properties for sources at redshifts z <
2.0, using a sample of 262 AGN in the Subaru/XMM-Newton Deep Survey
(SXDS). Morphological classification was obtained using the galSVM code,
one of the new methods useful especially when dealing with high-redshift
sources and low-resolution data. Colour-magnitude diagrams were studied
in relationship with redshift, morphology, X-ray obscuration, and
X-ray-to-optical flux ratio. Finally, the significance of different
regions was analysed on colour-magnitude diagrams, relating the observed
properties of AGN populations with some models of their formation and
evolution.