English (United Kingdom)

https://curated-unify.zendy.io/wp-json/zendy-region/v1/featured_content/oa?rat=en

https://curated-unify.zendy.io/wp-json/zendy-region/v1/highlighted_journal/

Global: Zendy Plus annual

Presents the access of premium content as premium feature

Premium Content

Presents the keyphrase highlighting as premium feature

Keyphrase Highlighting

Presents the summarisation as premium feature

Summarisation

Insights

Presents the pdf analysis as premium feature

PDF Analysis

Presents the zaia usage as premium feature

ZAIA

Global: Zendy Tools annual

Global: Zendy Free Plan

Global: Zendy Tools monthly

Global: Zendy Plus monthly

Active galactic nuclei (AGN) show evidence for reprocessing gas, outflowingfrom the accreting black hole. The combined effects of absorption andscattering from the circumnuclear material likely explains the `hard excess' ofX-ray emission above 20 keV, compared with extrapolation of spectra from lowerX-ray energies. In a recent {\it Suzaku} study, we established the ubiquitoushard excess in hard X-ray-selected, radio-quiet type\,1 AGNs to be consistentwith reprocessing of the X-ray continuum an ensemble of clouds, located tens tohundreds of gravitational radii from the nuclear black hole. Here we add hardX-ray-selected, type\,2 AGN to extend our original study and show that thegross X-ray spectral properties of the entire local population of radio quietAGN may be described by a simple unified scheme. We find a broad, continuousdistribution of spectral hardness ratio and Fe\,K$\alpha$ equivalent widthacross all AGN types, which can be reproduced by varying the observer'ssightline through a single, simple model cloud ensemble, provided the radiativetransfer through the model cloud distribution includes not only photoelectricabsorption but also 3D Compton scattering. Variation in other parameters of thecloud distribution, such as column density or ionisation, should be expectedbetween AGN, but such variation is not required to explain the gross X-rayspectral properties.

The Global Implications of the Hard Excess II: Analysis of the Local population of Radio Quiet AGN