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CACHEM: Probing Clustering of X-ray AGN using Chandra and Semi-Empirical Models

Total Cost €


EC-Contrib. €






Project "CACHEM" data sheet

The following table provides information about the project.


Organization address
city: PISA
postcode: 56126

contact info
title: n.a.
name: n.a.
surname: n.a.
function: n.a.
email: n.a.
telephone: n.a.
fax: n.a.

 Coordinator Country Italy [IT]
 Total cost 168˙277 €
 EC max contribution 168˙277 € (100%)
 Programme 1. H2020-EU.1.3.2. (Nurturing excellence by means of cross-border and cross-sector mobility)
 Code Call H2020-MSCA-IF-2016
 Funding Scheme MSCA-IF-EF-ST
 Starting year 2018
 Duration (year-month-day) from 2018-01-01   to  2019-12-31


Take a look of project's partnership.

# participants  country  role  EC contrib. [€] 
1    SCUOLA NORMALE SUPERIORE IT (PISA) coordinator 168˙277.00


 Project objective

The presence of a supermassive black hole (BH) in almost all galaxies in the Universe is an accepted paradigm in astronomy. How these BHs form and how they co-evolve with the host galaxy is one of the most intriguing unanswered problems in modern Cosmology and of extreme relevance to understand the issue of galaxy formation. Clustering measurements can powerfully test theoretical model predictions of BH triggering scenarios and put constraints on the typical environment where AGN live in, through the connection with their host dark matter halos. This project wants to probe the clustering properties of X-ray AGN from both an observational and theoretical point of view, using the new catalog of AGN detected by Chandra in COSMOS and semiempirical models. The Chandra COSMOS-Legacy (CCL) catalog is the largest available sample of X-ray AGN for clustering studies, allowing clustering measurements as a function of obscuration, luminosity and AGN host galaxy properties for the first time up to z~3-4 and with the accuracy needed to model the AGN halo occupation. We also propose to generate mock catalogs of galaxies and BHs assigned via semi-empirical relations to large samples of dark matter halos. Via detailed comparisons of the predictions from the mocks with the AGN clustering at different scales, redshifts and obscuration cuts, we will set unique constraints on the BH/galaxy properties driving the clustering measurements of CCL AGN, especially of obscured sources. This in turn is crucial to understand the AGN/galaxy co-evolution and to test different BH triggering scenarios at different epochs. SNS will constitute for the Applicant an invaluable and unique environment at the European level, where she will achieve extreme competence in both theory and observations. Her profile will become extremely relevant with the advent of large dedicated extra-galactic European missions such as EUCLID, eRosita, Athena.


year authors and title journal last update
List of publications.
2019 E. Keihänen, H. Kurki-Suonio, V. Lindholm, A. Viitanen, A.-S. Suur-Uski, V. Allevato, E. Branchini, F. Marulli, P. Norberg, D. Tavagnacco, S. de la Torre, J. Valiviita, M. Viel, J. Bel, M. Frailis, A. G. Sánchez
Estimating the galaxy two-point correlation function using a split random catalog
published pages: A73, ISSN: 0004-6361, DOI: 10.1051/0004-6361/201935828
Astronomy & Astrophysics 631 2020-02-20
2020 Hyewon Suh, Francesca Civano, Benny Trakhtenbrot, Francesco Shankar, Günther Hasinger, David B. Sanders, Viola Allevato
No Significant Evolution of Relations between Black Hole Mass and Galaxy Total Stellar Mass Up to z ∼ 2.5
published pages: 32, ISSN: 1538-4357, DOI: 10.3847/1538-4357/ab5f5f
The Astrophysical Journal 889/1 2020-02-20
2019 Francesco Shankar, Mariangela Bernardi, Kayleigh Richardson, Christopher Marsden, Ravi K Sheth, Viola Allevato, Luca Graziani, Mar Mezcua, Federica Ricci, Samantha J Penny, Fabio La Franca, Fabio Pacucci
Black hole scaling relations of active and quiescent galaxies: Addressing selection effects and constraining virial factors
published pages: 1278-1292, ISSN: 0035-8711, DOI: 10.1093/mnras/stz376
Monthly Notices of the Royal Astronomical Society 485/1 2020-02-20
2019 Francesco Shankar, Viola Allevato, Mariangela Bernardi, Christopher Marsden, Andrea Lapi, Nicola Menci, Philip J. Grylls, Mirko Krumpe, Lorenzo Zanisi, Federica Ricci, Fabio La Franca, Ranieri D. Baldi, Jorge Moreno, Ravi K. Sheth
Constraining black hole–galaxy scaling relations and radiative efficiency from galaxy clustering
published pages: , ISSN: 2397-3366, DOI: 10.1038/s41550-019-0949-y
Nature Astronomy 2020-02-20
2020 Francesco Shankar, David H Weinberg, Christopher Marsden, Philip J Grylls, Mariangela Bernardi, Guang Yang, Benjamin Moster, Rosamaria Carraro, David M Alexander, Viola Allevato, Tonima T Ananna, Angela Bongiorno, Giorgio Calderone, Francesca Civano, Emanuele Daddi, Ivan DelVecchio, Federica Duras, Fabio La Franca, Andrea Lapi, Youjun Lu, Nicola Menci, Mar Mezcua, Federica Ricci, Giulia Rodighiero
Probing black hole accretion tracks, scaling relations and radiative efficiencies from stacked X-ray active galactic nuclei
published pages: , ISSN: 0035-8711, DOI: 10.1093/mnras/stz3522
Monthly Notices of the Royal Astronomical Society 2020-02-20
2019 V. Allevato, A. Viitanen, A. Finoguenov, F. Civano, H. Suh, F. Shankar, A. Bongiorno, A. Ferrara, R. Gilli, T. Miyaji, S. Marchesi, N. Cappelluti, M. Salvato
Chandra COSMOS Legacy Survey: Clustering dependence of Type 2 active galactic nuclei on host galaxy properties
published pages: A88, ISSN: 0004-6361, DOI: 10.1051/0004-6361/201936191
Astronomy & Astrophysics 632 2020-02-20
2018 M. C. Powell, N. Cappelluti, C. M. Urry, M. Koss, A. Finoguenov, C. Ricci, B. Trakhtenbrot, V. Allevato, M. Ajello, K. Oh, K. Schawinski, N. Secrest
The Swift /BAT AGN Spectroscopic Survey. IX. The Clustering Environments of an Unbiased Sample of Local AGNs
published pages: 110, ISSN: 1538-4357, DOI: 10.3847/1538-4357/aabd7f
The Astrophysical Journal 858/2 2020-02-20
2019 A. Viitanen, V. Allevato, A. Finoguenov, A. Bongiorno, N. Cappelluti, R. Gilli, T. Miyaji, M. Salvato
The XMM-Newton wide field survey in the COSMOS field: Clustering dependence of X-ray selected AGN on host galaxy properties
published pages: A14, ISSN: 0004-6361, DOI: 10.1051/0004-6361/201935186
Astronomy & Astrophysics 629 2020-02-20

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