M. Pović, A. M. Pérez García, M. Sánchez-Portal, A. Bongiovanni, J. Cepa, M. Fernández Lorenzo, M. A. Lara-López, J. Gallego, A. Ederoclite, I. Márquez, J. Masegosa, E. Alfaro, H. Castañeda, J. I. González-Serrano, J. J. González
Luminosity functions are one of the most important observational clues when studying galaxy evolution over cosmic time. In this paper we present the X-ray luminosity functions of X-ray detected AGN in the SXDS and GWS fields. The limiting fluxes of our samples are 9.0x10^(-15) and 4.8x10^(-16) erg/cm^2/sec^(-1) in the 0.5 - 7.0 keV band in the two fields, respectively. We carried out analysis in three X-ray bands and in two redshift intervals up to z < 1.4. Moreover, we derive the luminosity functions for different optical morphologies and X-ray types. We confirm strong luminosity evolution in all three bands, finding the most luminous objects at higher redshift. However, no signs of density evolution are found in any tested X-ray band. We obtain similar results for compact and early-type objects. Finally, we observe the `Steffen effect', where X-ray type-1 sources are more numerous at higher luminosities in comparison with type-2 sources.
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http://arxiv.org/abs/1302.6719
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