X-Ray morphological analysis of the Planck ESZ clusters
| Autor: | Gabriel W. Pratt, Felipe Andrade-Santos, Stefano Ettori, Ralph P. Kraft, William R. Forman, Monique Arnaud, Lorenzo Lovisari, J. Démoclès, Scott W. Randall, Christine Jones |
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| Přispěvatelé: | Astrophysique Interprétation Modélisation (AIM (UMR_7158 / UMR_E_9005 / UM_112)), Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Institut national des sciences de l'Univers (INSU - CNRS)-Université Paris Diderot - Paris 7 (UPD7)-Centre National de la Recherche Scientifique (CNRS), Centre National de la Recherche Scientifique (CNRS)-Institut national des sciences de l'Univers (INSU - CNRS)-Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Université Paris Diderot - Paris 7 (UPD7), Laboratoire AIM, Université Paris Diderot - Paris 7 ( UPD7 ) -Centre d'Etudes de Saclay, Astrophysique Interprétation Modélisation (AIM (UMR7158 / UMR_E_9005 / UM_112)) |
| Jazyk: | angličtina |
| Rok vydání: | 2017 |
| Předmět: |
Physics
Cosmology and Nongalactic Astrophysics (astro-ph.CO) galaxies: clusters: intracluster medium 010308 nuclear & particles physics Sample (material) [ PHYS.ASTR ] Physics [physics]/Astrophysics [astro-ph] FOS: Physical sciences Astronomy and Astrophysics Large range Astrophysics 01 natural sciences symbols.namesake Space and Planetary Science X-rays: galaxies: clusters 0103 physical sciences Morphological analysis Cluster (physics) symbols Cluster sampling Planck [PHYS.ASTR]Physics [physics]/Astrophysics [astro-ph] 010303 astronomy & astrophysics Galaxy cluster Astrophysics - Cosmology and Nongalactic Astrophysics |
| Zdroj: | Astrophys.J. Astrophys.J., 2017, 846 (1), pp.51. ⟨10.3847/1538-4357/aa855f⟩ Astrophys.J., 2017, 846 (1), pp.51. 〈10.3847/1538-4357/aa855f〉 |
| Popis: | 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, SZ selected cluster samples have been found to include a greater fraction of disturbed systems than X-ray selected samples. In this paper we determined 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 one to select 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 indeed the ESZ clusters tend to be more disturbed, as found by previous studies. Comment: 27 pages, 17 figures, 7 tables. Accepted for publication in ApJ |
| Databáze: | OpenAIRE |
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