XMM-Newton and AKARI Selection of Obscured AGNs
Abstract
Obscured AGNs are an essential population to understand various aspects of the structure and evolution of AGNs. The combination of X-ray and infrared (IR) is often employed to find obscured AGNs utilizing absorbed X-ray spectra and infrared reemission from dust. We matched X-ray sources in the XMM serendipitous source catalogue and the IR all sky surveys with AKARI, and developed diagrams using X-ray to IR ratio, X-ray hardness, and IR color to efficiently select obscured AGNs. We analyzed XMM spectra of 49 candidates for obscured AGN with detected counts greater than 60. 17 and 10 objects among them turned out to be AGNs absorbed by Compton thin (N_{H} ∼ 10^{22-24} cm^{-2}) and Compton thick material (N_{H} >10^{24} cm^{-2}), respectively. Obscured AGN activity in 14 sources are found in this work for the first time. Three obscured AGNs we selected are classified as an HII nucleus based on their optical spectra, and are examples of elusive AGNs found by our technique. We report the details of our diagrams and X-ray spectral analysis.
- Publication:
-
The X-ray Universe 2014
- Pub Date:
- July 2014
- Bibcode:
- 2014xru..confE.195T