The Compton-thick active galactic nuclei luminosity function in the local Universe - A robust estimate combining Burst Alert Telescope detections and NuSTAR spectra

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Volume 695 (March 2025)

A&A, 695 (2025) A128

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Table 2.

Compton-thick AGN fractions.

Sample	Fraction	Redshift
This work ^( × )	$0 . 24_{- 0.05}^{+ 0.05}$ $0.24^{+0.05}_{-0.05}$	< 0.05
Burlon et al. (2011)^( × )	$0 . 20_{- 0.06}^{+ 0.09}$ $0.20^{+0.09}_{-0.06}$	< 0.1
Ricci et al. (2017)^( × )	$0 . 27_{- 0.04}^{+ 0.04}$ $0.27^{+0.04}_{-0.04}$	< 0.1
Torres-Albà et al. (2021)^( × )	$0 . 20_{- 0.05}^{+ 0.05}$ $0.20^{+0.05}_{-0.05}$	< 0.01
Ueda et al. (2014)^( × )	$0 . 27_{- 0.05}^{+ 0.05}$ $0.27^{+0.05}_{-0.05}$	< 0.1
Buchner et al. (2015)^( † )	$0 . 43_{- 0.10}^{+ 0.10}$ $0.43^{+0.10}_{-0.10}$	≈0
Laloux et al. (2023)^{( † ), (1)}	$0 . 21_{- 0.10}^{+ 0.16}$ $0.21^{+0.16}_{-0.10}$	< 0.5
Akylas et al. (2024)⁽²⁾	$0 . 25_{- 0.05}^{+ 0.05}$ $0.25^{+0.05}_{-0.05}$	z< 0.02
Boorman et al. (2024)⁽³⁾	$0 . 35_{- 0.06}^{+ 0.06}$ $0.35^{+0.06}_{-0.06}$	< 0.044
Ananna et al. (2019)⁽⁴⁾	$0 . 33_{- 0.10}^{+ 0.10}$ $0.33^{+0.10}_{-0.10}$	< 0.1

Notes. Column Description: (1) Sample. (2) Compton-thick fraction (N_H = 10^{24 − 25} cm⁻²). (3) Redshift. The × denotes fractions are based on BAT in the local Universe. ^( † )symbol denotes fractions based on XMM-Newton and Chandra observations at higher redshifts. ⁽¹⁾Estimate based on mid-IR priors. ⁽²⁾AGN sample selected using WISE warm colours. ⁽³⁾AGN sample selected using warm IRAS colours. ⁽⁴⁾Based on X-ray background synthesis models.

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