TY - JOUR
T1 - The Three Hundred project
T2 - Dynamical state of galaxy clusters and morphology from multiwavelength synthetic maps
AU - De Luca, Federico
AU - De Petris, Marco
AU - Yepes, Gustavo
AU - Cui, Weiguang
AU - Knebe, Alexander
AU - Rasia, Elena
PY - 2021/7/1
Y1 - 2021/7/1
N2 - We study the connection between morphology and dynamical state of the simulated galaxy clusters in z [0, 1.031] from The Three Hundred project. We quantify cluster dynamical state using a combination of dynamical indicators from theoretical measures and compare this combined parameter, χ, with the results from morphological classifications. The dynamical state of the cluster sample shows a continuous distribution from dynamically relaxed, more abundant at lower redshift, to hybrid and disturbed. The dynamical state presents a clear dependence on the radius, with internal regions more relaxed than outskirts. The morphology from multiwavelength mock observation of clusters in X-ray, optical, and Sunyaev-Zel'dovich (SZ) effect images is quantified by M - a combination of six parameters for X-ray and SZ maps and the offsets between the optical position of the brightest cluster galaxy (BCG) and the X-ray/SZ centroids. All the morphological parameters are highly correlated with each other, while they show a moderately strong correlation with the dynamical χ parameter. The X-ray or SZ peaks are less affected by the dynamical state than centroids, which results in reliable tracers of the cluster density peak. The principal source of contamination in the relaxed cluster fraction, inferred from morphological parameters, is due to dynamically hybrid clusters. Compared to individual parameters, which consider only one aspect of cluster property (e.g. only clumping or asymmetry), the combined morphological and dynamical parameters (M and χ) collect more information and provide a single and more accurate estimation of the cluster dynamical state.
AB - We study the connection between morphology and dynamical state of the simulated galaxy clusters in z [0, 1.031] from The Three Hundred project. We quantify cluster dynamical state using a combination of dynamical indicators from theoretical measures and compare this combined parameter, χ, with the results from morphological classifications. The dynamical state of the cluster sample shows a continuous distribution from dynamically relaxed, more abundant at lower redshift, to hybrid and disturbed. The dynamical state presents a clear dependence on the radius, with internal regions more relaxed than outskirts. The morphology from multiwavelength mock observation of clusters in X-ray, optical, and Sunyaev-Zel'dovich (SZ) effect images is quantified by M - a combination of six parameters for X-ray and SZ maps and the offsets between the optical position of the brightest cluster galaxy (BCG) and the X-ray/SZ centroids. All the morphological parameters are highly correlated with each other, while they show a moderately strong correlation with the dynamical χ parameter. The X-ray or SZ peaks are less affected by the dynamical state than centroids, which results in reliable tracers of the cluster density peak. The principal source of contamination in the relaxed cluster fraction, inferred from morphological parameters, is due to dynamically hybrid clusters. Compared to individual parameters, which consider only one aspect of cluster property (e.g. only clumping or asymmetry), the combined morphological and dynamical parameters (M and χ) collect more information and provide a single and more accurate estimation of the cluster dynamical state.
KW - Galaxies: clusters: general
KW - Galaxies: clusters: intracluster medium
KW - Methods: numerical
UR - http://www.scopus.com/inward/record.url?scp=85108514969&partnerID=8YFLogxK
U2 - 10.1093/mnras/stab1073
DO - 10.1093/mnras/stab1073
M3 - Article
AN - SCOPUS:85108514969
SN - 0035-8711
VL - 504
SP - 5383
EP - 5400
JO - Monthly Notices of the Royal Astronomical Society
JF - Monthly Notices of the Royal Astronomical Society
IS - 4
ER -