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

AuthorsPović, Mirjana; Pérez-García, Ana M.; Sánchez-Portal, Miguel; Bongiovanni, A.; Cepa, Jordi; Fernández Lorenzo, M. CSIC ORCID; Lara-López, M. A.; Gallego, Jesús; Ederoclite, A.; Márquez, Isabel CSIC ORCID; Masegosa, Josefa CSIC ORCID; Alfaro, Emilio J. CSIC ORCID ; Castañeda, Héctor; González-Serrano, José Ignacio CSIC ORCID ; González-González, J. J.
KeywordsGalaxies: luminosity function
Mass function
X-rays: galaxies
Galaxies: active
Issue Date2013
CitationAstronomische Nachrichten 334(3): 288-299 (2013)
AbstractLuminosity 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 9.0 ×10-15 and 4.8 ×10-16 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 ≤ 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.
Publisher version (URL)https://doi.org/10.1002/asna.201211840
Identifiersdoi: 10.1002/asna.201211840
issn: 0004-6337
e-issn: 1521-3994
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(IFCA) Artículos
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