X-ray absorption in INTEGRAL AGN: Host galaxy inclination
Journal
Date Issued
2020
Author(s)
Abstract
In this work the INTEGRAL hard X-ray selected sample of AGN has been used to
investigate the possible contribution of absorbing material distributed within
the host galaxies to the total amount of NH measured in the X-ray band. We
collected all the available axial ratio measurements of the galaxies hosting
our AGN together with their morphological information and find that also for
our hard X-ray selected sample a deficit of edge-on galaxies hosting type 1 AGN
is present. We estimate that in our hard X-ray selected sample there is a
deficit of 24% (+/- 5%) of type 1 AGN. Possible bias in redshift has been
excluded, as we found the same effect in a well determined range of z where the
number and the distributions of the two classes are statistically the same. Our
findings clearly indicate that material located in the host galaxy on scales of
hundreds of parsecs and not aligned with the putative absorbing torus of the
AGN can contribute to the total amount of column density. This galactic
absorber can be large enough to hide the broad line region of some type 1 AGN
causing their classification as type 2 objects and giving rise to the
deficiency of type 1 in edge-on galaxies.
Volume
639
Start page
A5
Issn Identifier
0004-6361
Ads BibCode
2020A&A...639A...5M
Rights
open.access
File(s)![Thumbnail Image]()
![Thumbnail Image]()
Loading...
Name
aa38014-20-2.pdf
Description
PDF editoriale
Size
1.6 MB
Format
Adobe PDF
Checksum (MD5)
ca655b6b95ec0707c16af71519ac98e8
Loading...
Name
2005.01028.pdf
Description
preprint
Size
419.83 KB
Format
Adobe PDF
Checksum (MD5)
ca7aa5c063b1ddb6f93e709d55133fe6