Access to Astronomical Catalogues

← Click to display the menu
J/MNRAS/449/1422     2XMM AGN X-ray and mid-IR luminosities      (Mateos+, 2015)

Revisiting the relationship between 6 µm and 2-10 keV continuum luminosities of AGN. Mateos S., Carrera F.J., Alonso-Herrero A., Rovilos E., Hernan-Caballero A., Barcons X., Blain A., Caccianiga A., Della Ceca R., Severgnini P. <Mon. Not. R. Astron. Soc., 449, 1422-1440 (2015)> =2015MNRAS.449.1422M (SIMBAD/NED BibCode)
ADC_Keywords: Active gal. nuclei ; X-ray sources ; Infrared sources ; Spectroscopy Keywords: galaxies: active - quasars: supermassive black holes - infrared: galaxies - X-rays: galaxies Abstract: We have determined the relation between the AGN luminosities at rest-frame 6µm associated with the dusty torus emission and at 2-10keV energies using a complete, X-ray-flux-limited sample of 232 AGN drawn from the Bright Ultra-hard XMM-Newton Survey. The objects have intrinsic X-ray luminosities between 1042 and 1046erg/s and redshifts from 0.05 to 2.8. The rest-frame 6µm luminosities were computed using data from the Wide-field Infrared Survey Explorer and are based on a spectral energy distribution decomposition into AGN and galaxy emission. The best-fitting relationship for the full sample is consistent with being linear, L6µm∝L2-10keV0.99±0.03, with intrinsic scatter, ΔlogL6µm∼0.35dex. The L6µm/L2-10keV luminosity ratio is largely independent of the line-of-sight X-ray absorption. Assuming a constant X-ray bolometric correction, the fraction of AGN bolometric luminosity reprocessed in the mid-IR decreases weakly, if at all, with the AGN luminosity, a finding at odds with simple receding torus models. Type 2 AGN have redder mid-IR continua at rest-frame wavelengths <12µm and are overall ∼1.3-2 times fainter at 6µm than type 1 AGN at a given X-ray luminosity. Regardless of whether type 1 and type 2 AGN have the same or different nuclear dusty toroidal structures, our results imply that the AGN emission at rest-frame 6µm is not isotropic due to self-absorption in the dusty torus, as predicted by AGN torus models. Thus, AGN surveys at rest-frame ∼6µm are subject to modest dust obscuration biases. Description: Our AGN sample was drawn from the wide-angle BUXS (Mateos et al. 2012MNRAS.426.3271M). BUXS is a large, complete, flux-limited sample of X-ray bright (f4.5-10keV>6x10-14erg/s/cm2) AGN detected with the XMM-Newton observatory at 4.5-10 keV energies. The survey is based on 381 high Galactic latitude (|b|>20°) XMM-Newton observations having good quality for serendipitous source detection that were used to derive extragalactic source count distributions at intermediate X-ray fluxes (Mateos et al. 2008A&A...492...51M). BUXS contains 255 AGN, after removal of Galactic stars and known BL Lacs (<3 per cent), detected over a total sky area of 44.43 deg2. File Summary:
FileName Lrecl Records Explanations
ReadMe 80 . This file tablea1.dat 46 232 Properties of the AGN used in this study
See also: IX/50 : XMM-Newton Serendipitous Source Catalogue 3XMM-DR6 (XMM-SSC, 2016) J/A+A/418/465 : Mid-infrared and hard X-ray emission in AGN (Lutz+, 2004) J/A+A/493/339 : XMM-Newton serendipitous Survey. V. (Watson+, 2009) J/MNRAS/416/1844 : 2XMM ultraluminous X-ray source candidates (Walton+, 2011) J/ApJ/807/129 : X-ray to MIR luminosities relation of AGNs (Stern, 2015) J/A+A/590/A80 : 2-10keV luminosity function of AGN (Ranalli+, 2016) Byte-by-byte Description of file: tablea1.dat
Bytes Format Units Label Explanations
1- 4 A4 --- --- [2XMM] 5- 20 A16 --- 2XMM X-ray source name (2XMMi JHHMMSS.s+DDMMSS; 2XMM JHHMMSS.s+DDMMSS in Simbad) (1) 22- 24 F3.1 --- Class [1/2] Optical spectroscopic classification (2) 26- 30 F5.2 [10-7W] logLX Log of Xray luminosity from 2-10 keV (in erg/s) (3) 32- 35 F4.2 [10-7W] e_logLX 1σ uncertainty in logLX (3) 37- 41 F5.2 [10-7W] logLIR Log of rest-frame 6 µm AGN luminosity associated with the dusty torus emission (in erg/s) (4) 43- 46 F4.2 [10-7W] e_logLIR 1σ uncertainty in logLIR (4)
Note (1): The targets are listed in order of increasing right ascension. Name as listed in the second incremental version of the Second XMM-Newton Serendipitous Source Catalogue (2XMM-DR3; Watson et al. 2009, J/A+A/493/339). Note (2): 137 objects are type 1 AGN (122 Seyfert 1s, 15 Seyfert 1.5s) and 95 type 2 AGN (3 Seyfert 1.8s, 14 Seyfert 1.9s and 78 Seyfert 2s). Note (3): The luminosities have been corrected for X-ray absorption. Note (4): The infrared luminosities have been corrected for both the accretion disc and host galaxy emission.
History: From electronic version of the journal
(End) Tiphaine Pouvreau [CDS] 30-Nov-2017
The document above follows the rules of the Standard Description for Astronomical Catalogues.From this documentation it is possible to generate f77 program to load files into arrays or line by line

catalogue service