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 Plus monthly

Global: Zendy Tools annual

Global: Zendy Tools monthly

Global: Zendy Free Plan

We describe a complete volume limited sample of nearby active galaxiesselected by their 14-195keV luminosity, and outline its rationale for studyingthe mechanisms regulating gas inflow and outflow. We describe also acomplementary sample of inactive galaxies, selected to match the AGN hostgalaxy properties. The active sample appears to have no bias in terms of AGNtype, the only difference being the neutral absorbing column which is twoorders of magnitude greater for the Seyfert 2s. In the luminosity range spannedby the sample, log L_{14-195keV} [erg/s] = 42.4-43.7, the optically obscuredand X-ray absorbed fractions are 50-65%. The similarity of these fractions tomore distant spectroscopic AGN samples, although over a limited luminosityrange, suggests that the torus does not strongly evolve with redshift. Oursample confirms that X-ray unabsorbed Seyfert 2s are rare, comprising not morethan a few percent of the Seyfert 2 population. At higher luminosities, theoptically obscured fraction decreases (as expected for the increasing dustsublimation radius), but the X-ray absorbed fraction changes little. We arguethat the cold X-ray absorption in these Seyfert 1s can be accounted for byneutral gas in clouds that also contribute to the broad line region (BLR)emission; and suggest that a geometrically thick neutral gas torus co-existswith the BLR and bridges the gap to the dusty torus.

Insights on the Dusty Torus and Neutral Torus from Optical and X-ray Obscuration in a Complete Volume Limited Hard X-ray AGN Sample