2016/03/31 by Sophia Thölken, S. Thölken, Lorenzo Lovisari +5
Physics and Astronomy · #Astronomy and Astrophysical Research #Astrophysical Phenomena and Observations #Computational astrophysics #Entropy (arrow of time) #Galaxies: Formation, Evolution, Phenomena #Galaxy #Galaxy cluster #Galaxy group #Galaxy groups and clusters #astro-ph.CO #astro-ph.HE
paper · pdf · doi:10.1051/0004-6361/201527608
published as A&A 592, A37 (2016) · 15 pages, 13 figures, accepted by A&A
openalex publication_date 2016/05/10 · openalex created_date 2016/06/24 · arxiv created 2016/07/02 · arxiv updated 2016/07/20 · openalex updated_date 2026/08/05
Context. In the last few years, the outskirts of galaxy clusters have been studied in detail and the analyses have brought up interesting results such as indications of possible gas clumping and the breakdown of hydrostatic, thermal, and ionization equilibrium. These phenomena affect the entropy profiles of clusters, which often show deviations from the self-similar prediction around R200. However, significant uncertainties remain for groups of galaxies. In particular the question, of whether entropy profiles are similar to those of galaxy clusters.