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The Physics of Galaxy Cluster Outskirts

Journal
Date Issued
2019
Author(s)
Walker, Stephen
•
Simionescu, Aurora
•
Nagai, Daisuke
•
Okabe, Nobuhiro
•
Eckert, Dominique
•
Mroczkowski, Tony
•
Akamatsu, Hiroki
•
•
DOI
Abstract
As the largest virialized structures in the universe, galaxy clusters continue to grow and accrete matter from the cosmic web. Due to the low gas density in the outskirts of clusters, measurements are very challenging, requiring extremely sensitive telescopes across the entire electromagnetic spectrum. Observations using X-rays, the Sunyaev-Zeldovich effect, and weak lensing and galaxy distributions from the optical band, have over the last decade helped to unravel this exciting new frontier of cluster astrophysics, where the infall and virialization of matter takes place. Here, we review the current state of the art in our observational and theoretical understanding of cluster outskirts, and discuss future prospects for exploration using newly planned and proposed observatories.
Volume
215
Issue
1
Start page
7
Uri
Url
Issn Identifier
0038-6308
Ads BibCode
2019SSRv..215....7W
Rights
open.access
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