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

Accreting supermassive black holes (SMBHs) located at the center of galaxiesare typically surrounded by large quantities of gas and dust. The structure andevolution of this circumnuclear material can be studied at differentwavelengths, from the submillimeter to the X-rays. Recent X-ray studies haveshown that the covering factor of the obscuring material tends to decrease withincreasing Eddington ratio, likely due to radiative feedback on dusty gas. Herewe study a sample of 549 nearby (z<0.1) hard X-ray (14-195 keV) selectednon-blazar active galactic nuclei (AGN), and use the ratio between the AGNinfrared and bolometric luminosity as a proxy of the covering factor. We findthat, in agreement with what has been found by X-ray studies of the samesample, the covering factor decreases with increasing Eddington ratio. We alsoconfirm previous findings which showed that obscured AGN typically have largercovering factors than unobscured sources. Finally, we find that the mediancovering factors of AGN located in different regions of the columndensity-Eddington ratio diagram are in good agreement with what would beexpected from a radiation-regulated growth of SMBHs.

BASS XLII: The relation between the covering factor of dusty gas and the Eddington ratio in nearby active galactic nuclei