X-ray luminosity functions of different morphological and X-ray type AGN populations

作者：Povic M^*; Perez Garcia A M; Sanchez Portal M; Bongiovanni A; Cepa J; Fernandez Lorenzo M; Lara Lopez M A; Gallego J; Ederoclite A; Marquez I; Masegosa J; Alfaro E; Castaneda H; Gonzalez Serrano J I; Gonzalez J J

来源：Astronomische Nachrichten, 2013, 334(3): 288-299.

DOI：10.1002/asna.201211840

• galaxies: active
• galaxies: luminosity function, mass function
• X-rays: galaxies

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 for 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) s(-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 %26lt;= 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 %26quot;Steffen effect%26quot;, where X-ray type-1 sources are more numerous at higher luminosities in comparison with type-2 sources.

• 出版日期2013-3