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Article Dans Une Revue Monthly Notices of the Royal Astronomical Society Année : 2019

Active Galactic Nuclei and their Large-scale Structure: an eROSITA mock catalogue

J. Comparat
  • Fonction : Auteur
A. Merloni
  • Fonction : Auteur
M. Salvato
  • Fonction : Auteur
K. Nandra
  • Fonction : Auteur
T. Boller
  • Fonction : Auteur
A. Georgakakis
  • Fonction : Auteur
A. Finoguenov
T. Dwelly
  • Fonction : Auteur
J. Buchner
  • Fonction : Auteur
A. del Moro
  • Fonction : Auteur
Y. Wang
  • Fonction : Auteur
Gang Zhao
  • Fonction : Auteur
F. Prada
  • Fonction : Auteur
G. Yepes
  • Fonction : Auteur
M. Brusa
  • Fonction : Auteur
M. Krumpe
  • Fonction : Auteur
T. Liu
  • Fonction : Auteur

Résumé

In the context of the upcoming SRG/eROSITA survey, we present an N-body simulation-based mock catalogue for X-ray-selected active galactic nucleus (AGN) samples. The model reproduces the observed hard X-ray AGN luminosity function (XLF) and the soft X-ray logN–logS from redshift 0 to 6. The XLF is reproduced to within |$\pm 5{{\ \rm per\ cent}}$| and the logN-logS to within |$\pm 20{{\ \rm per\ cent}}$|⁠. We develop a joint X-ray – optical extinction and classification model. We adopt a set of empirical spectral energy distributions to predict observed magnitudes in the UV, optical, and NIR. With the latest eROSITA all sky survey sensitivity model, we create a high-fidelity full-sky mock catalogue of X-ray AGN. It predicts their distributions in right ascension, declination, redshift, and fluxes. Using empirical medium resolution optical spectral templates and an exposure time calculator, we find that 1.1 × 10^6 (4 × 10^5) fibre-hours are needed to follow-up spectroscopically from the ground the detected X-ray AGN with an optical magnitude 21 < r < 22.8 (22.8 < r < 25) with a 4-m (8-m) class multiobject spectroscopic facility. We find that future clustering studies will measure the AGN bias to the per cent level at redshift z < 1.2 and should discriminate possible scenarios of galaxy-AGN co-evolution. We predict the accuracy to which the baryon acoustic oscillation standard ruler will be measured using X-ray AGN: better than 3 per cent for AGN between redshift 0.5 to 3 and better than 1 per cent using the Ly α forest of X-ray QSOs discovered between redshift 2 and 3. eROSITA will provide an outstanding set of targets for future galaxy evolution and cosmological studies.

Dates et versions

hal-02024209 , version 1 (19-02-2019)

Identifiants

Citer

J. Comparat, A. Merloni, M. Salvato, K. Nandra, T. Boller, et al.. Active Galactic Nuclei and their Large-scale Structure: an eROSITA mock catalogue. Monthly Notices of the Royal Astronomical Society, 2019, 487 (2), pp.2005-2029. ⟨10.1093/mnras/stz1390⟩. ⟨hal-02024209⟩
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