1. The Physics of Galaxy Cluster Outskirts
- Author
-
Stefano Ettori, Hiroki Akamatsu, Dominique Eckert, Tony Mroczkowski, Aurora Simionescu, Stephen Walker, Vittorio Ghirardini, Daisuke Nagai, and Nobuhiro Okabe
- Subjects
Cosmology and Nongalactic Astrophysics (astro-ph.CO) ,010504 meteorology & atmospheric sciences ,Electromagnetic spectrum ,Astrophysics::High Energy Astrophysical Phenomena ,FOS: Physical sciences ,Galaxy clusters ,Astrophysics::Cosmology and Extragalactic Astrophysics ,01 natural sciences ,Cosmic web ,0103 physical sciences ,Cluster (physics) ,010303 astronomy & astrophysics ,Astrophysics::Galaxy Astrophysics ,Galaxy cluster ,Weak gravitational lensing ,0105 earth and related environmental sciences ,Physics ,Astrophysics::Instrumentation and Methods for Astrophysics ,Astronomy ,Astronomy and Astrophysics ,Intracluster matter ,Astrophysics - Astrophysics of Galaxies ,Galaxy ,Planetary science ,Space and Planetary Science ,Astrophysics of Galaxies (astro-ph.GA) ,Astrophysics - Cosmology and Nongalactic Astrophysics - 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., Comment: 56 pages. Review paper. Published in Space Science Reviews
- Published
- 2019