@article{10902/35012,
year = {2021},
url = {https://hdl.handle.net/10902/35012},
abstract = {In the black hole (BH)–galaxy co-evolution framework, most of the star formation (SF) and the BH accretion are expected to take place in highly obscured conditions. The large amount of gas and dust absorbs most of the UV-to-soft-X radiation and re-emits it at longer
wavelengths, mostly in the IR. Thus, obscured active galactic nuclei (AGN) are very difficult to identify in optical or X-ray bands but shine bright in the IR. Moreover, X-ray background (XRB) synthesis models predict that a large fraction of the yet-unresolved XRB is due
to the most obscured (Compton thick, CT: NH ≥ 10²⁴ cm−²) of these AGN. In this work, we investigate the synergies between putative IR missions [using SPace Infrared telescope for Cosmology and Astrophysics (SPICA), proposed for European Space Agency (ESA)/M5 but
withdrawn in 2020 October, and Origins Space Telescope, OST, as ‘templates’] and the X-ray mission Athena (Advanced Telescope for High ENergy Astrophysics), which should fly in early 2030s, in detecting and characterising AGN, with a particular focus on the most obscured
ones. Using an XRB synthesis model, we estimated the number of AGN and the number of those which will be detected in the X-rays by Athena. For each AGN, we associated an optical-to-Far InfraRed (FIR) spectral energy distribution (SED) from observed AGN with both X-ray data and SED decomposition and used these SEDs to check if the AGN will be detected by SPICA-like or OST at IR wavelengths. We expect that, with the deepest Athena and SPICA-like (or OST) surveys, we will be able to photometrically detect in the IR more than 90% of all the AGN (down to L₂−₁₀keV ∼ 10⁴² erg s−₁ and up to z ∼ 10) predicted by XRB synthesis modeling, and we will detect at least half of them in the X-rays.},
organization = {FP, CV, CG, LB, and LS acknowledge financial support by the Agenzia Spaziale Italiana (ASI) under the research contract 2018-31-HH.0. FJC acknowledges financial support from the Spanish Ministry MCIU under project RTI2018-096686-B-C21 (MCIU/AEI/FEDER/UE), cofunded by FEDER funds and from the Agencia Estatal de Investigación, Unidad de Excelencia María de Maeztu, ref. MDM-2017-0765. MPS acknowledges support from the Comunidad de Madrid, Spain, through Atracción de Talento Investigador Grant 2018-T1/TIC-11035 and PID2019-105423GA-I00 (MCIU/AEI/FEDER,UE). AF acknowledges the support from grant PRIN MIUR2017-20173ML3WW_001.},
publisher = {Cambridge University Press},
publisher = {Publications of the Astronomical Society of Australia, 2021, 38, e033},
title = {The role of SPICA-like missions and the origins space telescope in the quest for heavily obscured AGN and synergies with Athena},
author = {Barchiesi, L. and Pozzi, F. and Vignali, C. and Carrera Troyano, Francisco Jesús and Vito, F. and Calura, F. and Bisigello, L. and Lanzuisi, G. and Gruppioni, C. and Lusso, E. and Delvecchio, I. and Negrello, M. and Cooray, A. and Feltre, A. and Fernández-Ontiveros, J.A. and Gallerani, S. and Kaneda, H. and Oyabu, S. and Pereira-Santaella, M. and Piconcelli, E.},
}