Using the Bright Ultrahard XMM-Newton survey to define an IR selection of luminous AGN based on WISE colours
Mateos et al. 2012, MNRAS, 426, 3271-3281
Mid-infrared colours for sources detected with the Wide Field Infrared Survey Explorer (WISE) with SNR≥5 at all 3.4, 4.6 and 12 μm. The small grey symbols are WISE sources detected in the BUXS survey area. The 0<z≤1.5 (Δz=0.5) star-forming tracks represent M82 and the ultra-luminous infrared galaxy (ULIRG) Arp 220. The open symbols indicate z=0. Our AGN selection wedge and power-law locus are the thick solid and dashed black lines, respectively. The dot–dashed (red) contours indicate the density of WISE sources detected in X-rays (normalized to the peak value). The bulk of the mid-infrared population not detected in X-rays overlaps with the horizontal sequence of normal galaxies, while the great majority of X-ray detected objects cluster near the power-law locus.
Uncovering obscured luminous AGN with WISE
Mateos et al. 2013, MNRAS, 434, 941–955
The dashed contours indicate the distribution of WISE infrared colours for luminous type 2 AGN (QSO2s) detected with the Sloan Digital Sky Survey (SDSS; density normalized to the peak value) and in survey areas of either Chandra or XMM-Newton. Open circles are those QSO2s detected in X-rays. Compton-thick candidates identified in the literature are indicated with open squares and triangles, respectively. Our AGN selection wedge and power-law locus are the thick solid and dashed black lines, respectively.
Revisiting the relationship between 6 μm and 2-10 keV continuum luminosities of AGN
Mateos et al. 2015, MNRAS, 449, 1422–1440
Rest-frame 6 μm monochromatic luminosities against 2-10 keV intrinsic (i.e., corrected for absorption) X-ray luminosities for all AGN from BUXS. The 6 μm luminosities have been corrected for emission from the accretion disk and contamination from the AGN hosts and therefore are associated with the emission from the AGN torus. The best-fit linear relations in log-log space for the full sample and the type 1 and type 2 AGN are indicated with solid, dotted, and dashed lines, respectively. We compare our results with the relation derived for local type 1 AGN by Lutz et al. (2004) (grey shading).
X-Ray Absorption, Nuclear Infrared Emission, and Dust Covering Factors of AGNs: Testing Unification Schemes
Mateos et al. 2016, ApJ, 819, 166
Distributions of the covering factors of AGN tori for objects with different optical classifications.
Survival of the Obscuring Torus in the Most Powerful Active Galactic Nuclei
Mateos et al. 2017, ApJL, 841, L18
The fraction of AGN classified as type 2 versus the geometrical covering factor of the nuclear obscured (i.e., the fraction of the sky, as seen from the central SMBH that is obscured). The results are presented in three different luminosity bins. Filled circles are the observed fraction of X-ray selected type 2 AGN in BUXS. The black solid line represents the expected 1:1 relation. Open squares are best-fit modes (i.e., including the type 2 sources undetected in X-rays). The insets show the probability density distribution of the covering factor for these missed sources.
AGNs with discordant optical and X-ray classification are not a physical family: diverse origin in two AGNs
Ordovás-Pascual et al. 2017, MNRAS, 469, 693–704
AGN-host decomposition of the UV-to-near-IR emission (extracted from VLT/XSHOOTER spectra) of two optical type 2 AGN not showing absorption in X-rays.
| No | Title | Author | ADS |
|---|---|---|---|
| 1 | AGNs with discordant optical and X-ray classification are not a physical family: diverse origin in two AGNs | Ordovás-Pascual et al. (2017) | ADS |
| 2 | Survival of the Obscuring Torus in the Most Powerful Active Galactic Nuclei | Mateos et al. (2017) | ADS |
| 3 | X-Ray Absorption, Nuclear Infrared Emission, and Dust Covering Factors of AGNs: Testing Unification Schemes | Mateos et al. (2016) | ADS |
| 4 | Revisiting the relationship between 6 μm and 2-10 keV continuum luminosities of AGN | Mateos et al. (2015) | ADS |
| 5 | Testing the unified model of Active Galactic Nuclei in X-ray selected type 1 and type 2 quasars | Mateos et al. (2014) | ADS |
| 6 | Uncovering obscured luminous AGN with WISE | Mateos et al. (2013) | ADS |
| 7 | Using the Bright Ultrahard XMM-Newton survey to define an IR selection of luminous AGN based on WISE colours | Mateos et al. (2012) | ADS |