Average broad-band X-ray spectra of the NuSTAR AGN
Abstract
I will present a study of the average X-ray spectral properties of the NuSTAR detected AGN in the ECDFS, EGS and COSMOS fields. We produce stacked spectra in the rest-frame 2-40 keV using Chandra and NuSTAR data and investigate how the intrinsic spectral parameters, such as the photon index, the strength of the iron Kα line and the Compton-reflection hump, depend on various source properties, i.e., their optical classification, absorbing column density (N_{H}) and X-ray luminosity. We also compare our results with the typical assumptions made by several population synthesis models of the cosmic X-ray background (CXB) and find some small discrepancies. Although small, these differences can have a non-negligible impact on the inferred composition of the CXB, in particular on the fraction of Compton-thick sources amongst the whole AGN population.
- Publication:
-
The X-ray Universe 2017
- Pub Date:
- October 2017
- Bibcode:
- 2017xru..conf...69D