The Hosts of X-Ray Absorption Lines Toward AGNs

Most baryonic matter in the universe exists in gaseous form and can be found in structures such as galactic halos and the low-density intergalactic medium. Proposed X-ray spectroscopy missions such as Athena, Arcus, and Lynx will have the capability to identify absorption lines in spectra toward bri...

Full description

Saved in:
Bibliographic Details
Published in:The Astronomical journal 2022-06, Vol.163 (6), p.264
Main Authors: Huber, Maggie C., Bregman, Joel N.
Format: Article
Language:English
Subjects:
Absorption
Active galactic nuclei
Astronomy
Galactic halos
Galaxies
Halos
Hot intergalactic medium
Intergalactic gas
Intergalactic media
Intergalactic medium phases
Line spectra
Matter & antimatter
Red shift
Separation
Spectrum analysis
Target recognition
X ray absorption
X-ray astronomy
X-ray spectroscopy
Citations: Items that this one cites
Items that cite this one
Online Access:Get full text
Tags: Add Tag
No Tags, Be the first to tag this record!
Description
Summary:Most baryonic matter in the universe exists in gaseous form and can be found in structures such as galactic halos and the low-density intergalactic medium. Proposed X-ray spectroscopy missions such as Athena, Arcus, and Lynx will have the capability to identify absorption lines in spectra toward bright active galactic nuclei (AGNs), which can be used as tools to probe this missing matter. In this study, we examine the optical fields surrounding 15 primary observing targets and identify the foreground galaxies and galaxy groups that are potential hosts of absorption. We record the basic properties of the potential host and their angular and physical separation from the AGN line of sight. This process is done by marking the location of various galaxies and groups in optical images of the field surrounding the target and plotting their angular separation versus redshift to gauge the physical proximity to the background source. We identify the surrounding objects according to those with measured redshifts and those that require accurate redshift measurements.
ISSN:0004-6256
1538-3881
DOI:10.3847/1538-3881/ac502c