skip to main content
OSTI.GOV title logo U.S. Department of Energy
Office of Scientific and Technical Information

Title: X-Ray Morphological Analysis of the Planck ESZ Clusters

Abstract

X-ray observations show that galaxy clusters have a very large range of morphologies. The most disturbed systems, which are good to study how clusters form and grow and to test physical models, may potentially complicate cosmological studies because the cluster mass determination becomes more challenging. Thus, we need to understand the cluster properties of our samples to reduce possible biases. This is complicated by the fact that different experiments may detect different cluster populations. For example, Sunyaev–Zeldovich (SZ) selected cluster samples have been found to include a greater fraction of disturbed systems than X-ray selected samples. In this paper we determine eight morphological parameters for the Planck Early Sunyaev–Zeldovich (ESZ) objects observed with XMM-Newton . We found that two parameters, concentration and centroid shift, are the best to distinguish between relaxed and disturbed systems. For each parameter we provide the values that allow selecting the most relaxed or most disturbed objects from a sample. We found that there is no mass dependence on the cluster dynamical state. By comparing our results with what was obtained with REXCESS clusters, we also confirm that the ESZ clusters indeed tend to be more disturbed, as found by previous studies.

Authors:
; ; ; ; ;  [1];  [2]; ; ;  [3]
  1. Harvard-Smithsonian Center for Astrophysics, 60 Garden Street, Cambridge, MA 02138 (United States)
  2. INAF, Osservatorio Astronomico di Bologna, via Ranzani 1, I-40127 Bologna (Italy)
  3. Laboratoire AIM, IRFU/Service d’Astrophysique—CEA/DRF—CNRS—Université Paris Diderot, Bât. 709, CEA-Saclay, F-91191 Gif-sur-Yvette Cedex (France)
Publication Date:
OSTI Identifier:
22663167
Resource Type:
Journal Article
Resource Relation:
Journal Name: Astrophysical Journal; Journal Volume: 846; Journal Issue: 1; Other Information: Country of input: International Atomic Energy Agency (IAEA)
Country of Publication:
United States
Language:
English
Subject:
79 ASTROPHYSICS, COSMOLOGY AND ASTRONOMY; ABUNDANCE; COMPARATIVE EVALUATIONS; CONCENTRATION RATIO; GALAXY CLUSTERS; MASS; X RADIATION; X-RAY GALAXIES

Citation Formats

Lovisari, Lorenzo, Forman, William R., Jones, Christine, Andrade-Santos, Felipe, Randall, Scott, Kraft, Ralph, Ettori, Stefano, Arnaud, Monique, Démoclès, Jessica, and Pratt, Gabriel W.. X-Ray Morphological Analysis of the Planck ESZ Clusters. United States: N. p., 2017. Web. doi:10.3847/1538-4357/AA855F.
Lovisari, Lorenzo, Forman, William R., Jones, Christine, Andrade-Santos, Felipe, Randall, Scott, Kraft, Ralph, Ettori, Stefano, Arnaud, Monique, Démoclès, Jessica, & Pratt, Gabriel W.. X-Ray Morphological Analysis of the Planck ESZ Clusters. United States. doi:10.3847/1538-4357/AA855F.
Lovisari, Lorenzo, Forman, William R., Jones, Christine, Andrade-Santos, Felipe, Randall, Scott, Kraft, Ralph, Ettori, Stefano, Arnaud, Monique, Démoclès, Jessica, and Pratt, Gabriel W.. Fri . "X-Ray Morphological Analysis of the Planck ESZ Clusters". United States. doi:10.3847/1538-4357/AA855F.
@article{osti_22663167,
title = {X-Ray Morphological Analysis of the Planck ESZ Clusters},
author = {Lovisari, Lorenzo and Forman, William R. and Jones, Christine and Andrade-Santos, Felipe and Randall, Scott and Kraft, Ralph and Ettori, Stefano and Arnaud, Monique and Démoclès, Jessica and Pratt, Gabriel W.},
abstractNote = {X-ray observations show that galaxy clusters have a very large range of morphologies. The most disturbed systems, which are good to study how clusters form and grow and to test physical models, may potentially complicate cosmological studies because the cluster mass determination becomes more challenging. Thus, we need to understand the cluster properties of our samples to reduce possible biases. This is complicated by the fact that different experiments may detect different cluster populations. For example, Sunyaev–Zeldovich (SZ) selected cluster samples have been found to include a greater fraction of disturbed systems than X-ray selected samples. In this paper we determine eight morphological parameters for the Planck Early Sunyaev–Zeldovich (ESZ) objects observed with XMM-Newton . We found that two parameters, concentration and centroid shift, are the best to distinguish between relaxed and disturbed systems. For each parameter we provide the values that allow selecting the most relaxed or most disturbed objects from a sample. We found that there is no mass dependence on the cluster dynamical state. By comparing our results with what was obtained with REXCESS clusters, we also confirm that the ESZ clusters indeed tend to be more disturbed, as found by previous studies.},
doi = {10.3847/1538-4357/AA855F},
journal = {Astrophysical Journal},
number = 1,
volume = 846,
place = {United States},
year = {Fri Sep 01 00:00:00 EDT 2017},
month = {Fri Sep 01 00:00:00 EDT 2017}
}