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  Active galactic nuclei and their large-scale structure: an eROSITA mock catalogue

Comparat, J., Merloni, A., Salvato, M., Nandra, K., Boller, T., Georgakakis, A., et al. (2019). Active galactic nuclei and their large-scale structure: an eROSITA mock catalogue. Monthly Notices of the Royal Astronomical Society, 487(2), 2005-2029. doi:10.1093/mnras/stz1390.

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Item Permalink: http://hdl.handle.net/21.11116/0000-0004-E47A-2 Version Permalink: http://hdl.handle.net/21.11116/0000-0004-E47B-1
Genre: Journal Article

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 Creators:
Comparat, J.1, Author              
Merloni, A.1, Author              
Salvato, M.1, Author              
Nandra, K.1, Author              
Boller, T.2, Author              
Georgakakis, A., Author
Finoguenov, A., Author
Dwelly, T.1, Author              
Buchner, J., Author
Del Moro, A.1, Author              
Clerc, N., Author
Wang, Y., Author
Zhao, G., Author
Prada, F., Author
Yepes, G., Author
Brusa, M., Author
Krumpe, M., Author
Liu, T.1, Author              
Affiliations:
1High Energy Astrophysics, MPI for Extraterrestrial Physics, Max Planck Society, ou_159890              
2Center for Astrochemical Studies at MPE, MPI for Extraterrestrial Physics, Max Planck Society, ou_1950287              

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 Abstract: 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 ±5 per cent and the logN-logS to within ±20 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 × 106 (4 × 105) 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.

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 Dates: 2019-05-20
 Publication Status: Published online
 Pages: -
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 Rev. Method: Peer
 Identifiers: DOI: 10.1093/mnras/stz1390
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Title: Monthly Notices of the Royal Astronomical Society
  Other : Mon. Not. R. Astron. Soc.
Source Genre: Journal
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Publ. Info: Oxford : Oxford University Press
Pages: - Volume / Issue: 487 (2) Sequence Number: - Start / End Page: 2005 - 2029 Identifier: ISSN: 1365-2966
CoNE: https://pure.mpg.de/cone/journals/resource/1000000000024150