Tracing the cosmic growth of supermassive black holes to z~3 with Herschel

Delvecchio, I, Gruppioni, C, Pozzi, F, Berta, S, Zamorani, G, Cimatti, A, Lutz, D, Scott, D, Vignali, C, Cresci, G, Feltre, A, Cooray, A, Vaccari, M, Fritz, J, Le Floc'h, E, Magnelli, B, Popesso, P, Oliver, S, Bock, J, Carollo, M, Contini, T, Le Févre, O, Lilly, S, Mainieri, V, Renzini, A and Scodeggio, M (2014) Tracing the cosmic growth of supermassive black holes to z~3 with Herschel. Monthly Notices of the Royal Astronomical Society, 439 (3). pp. 2736-2754. ISSN 0035-8711

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We study a sample of Herschel selected galaxies within the Great Observatories Origins Deep Survey-South and the Cosmic Evolution Survey fields in the framework of the Photodetector Array Camera and Spectrometer (PACS) Evolutionary Probe project. Starting from the rich multiwavelength photometric data sets available in both fields, we perform a broad-band spectral energy distribution decomposition to disentangle the possible active galactic nucleus (AGN) contribution from that related to the host galaxy. We find that 37 per cent of the Herschel-selected sample shows signatures of nuclear activity at the 99 per cent confidence level. The probability of revealing AGN activity increases for bright (L 1−1000 > 10 11 L ? ) star-forming galaxies at z > 0.3, becoming about 80 per cent for the brightest (L 1−1000 > 10 12 L ? )
Infrared (IR) galaxies at z≥1. Finally, we reconstruct the AGN bolometric luminosity function and the supermassive black hole growth rate across cosmic time up to z ∼ 3 from a far-IR perspective. This work shows general agreement with most of the panchromatic estimates from the literature, with the global black hole growth peaking at z ∼ 2 and reproducing the observed local black hole mass density with consistent values of the radiative efficiency Erad (∼0.07).

Item Type: Article
Keywords: galaxies: evolution–galaxies: nuclei–infrared: galaxies.
Schools and Departments: School of Mathematical and Physical Sciences > Physics and Astronomy
Subjects: Q Science > QB Astronomy > QB0460 Astrophysics
Depositing User: Richard Chambers
Date Deposited: 01 Jun 2015 12:18
Last Modified: 03 Jul 2019 00:49

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