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Luminosity function evolution of soft X-ray-selected active galactic nuclei in the RIXOS survey

AuthorsPage, M. J.; Carrera, Francisco J. CSIC ORCID CVN ; Hasinger, Günther; Mason, Keith O.; McMahon, Richard G.; Mittaz, J. P. D.; Barcons, Xavier CSIC ORCID ; Carballo, R.; González-Serrano, José Ignacio CSIC ORCID ; Pérez-Fournon, I.
KeywordsGalaxies: active
Galaxies: luminosity function
Mass function
Cosmology: observations
X-rays: galaxies
Issue Date1996
PublisherRoyal Astronomical Society
Oxford University Press
CitationMonthly Notices of the Royal Astronomical Society 281(2): 579-590 (1996)
AbstractA sample of 198 soft X-ray-selected active galactic nuclei (AGN) from the ROSAT International X-ray Optical Survey (RIXOS) is used to investigate the X-ray luminosity function and its evolution. RIXOS, with a flux limit of 3 × 10-14 erg s-1 cm-2 (0.5 to 2.0 keV), samples a broad range in redshift over 20 deg2 of sky, and is almost completely identified; it is used in combination wtih the Einstein Extended Medium Sensitivity Survey (EMSS) to give a total sample of over 600 AGN. We find the evolution of AGN with redshift to be consistent with pure luminosity evolution (PLE) models in which the evolution slows markedly or stops at high redshifts (z > 1.8). We find that this result is not affected by the inclusion, or exclusion, of narrow-emission-line galaxies at low redshift in the RIXOS and EMSS samples, and is insensitive to uncertainties in the conversion between flux values measured with ROSAT and Einstein. We confirm, using a model-independent ≺e/Va≻ test, that our survey is consistent with no evolution at high redshifts.
Publisher version (URL)https://doi.org/10.1093/mnras/281.2.579
Identifiersdoi: 10.1093/mnras/281.2.579
issn: 0035-8711
e-issn: 1365-2966
Appears in Collections:(IFCA) Artículos
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