The relativistic Fe Kα line in Seyfert 1 galaxies
Abstract
Relativistic iron lines (Fe Kα) are expected to be an ubiquitous feature in bright AGN. However, a significant fraction of object misses a relativistic line component. We investigated the physical reasons of its absence. To this aim we studied a sample of Seyfert 1 galaxies where controversial results on the presence of a relativistic line have been previously reported. I will show that high statistics is key to reveal the line: the relativistic Fe Kα line is detected at ≥95% confidence level in observations where the counts in the 5-7 keV energy band are ≥ 4 × 10^{4}. We also investigated the relationship between the relativistic Fe line and the high energy reflection continuum in NGC 4051. By taking advantage of the unprecedented quality of NuSTAR data, our analysis showed consistency between these features as expected from the standard reflection model in AGN.
- Publication:
-
The X-ray Universe 2017
- Pub Date:
- October 2017
- Bibcode:
- 2017xru..conf..137M