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  1. OA@INAF
  2. PRODOTTI RICERCA INAF
  3. 1 CONTRIBUTI IN RIVISTE (Journal articles)
  4. 1.01 Articoli in rivista
Please use this identifier to cite or link to this item: http://hdl.handle.net/20.500.12386/29564
Title: Morphological estimators on Sunyaev-Zel'dovich maps of MUSIC clusters of galaxies
Authors: Cialone, Giammarco
De Petris, Marco 
Sembolini, Federico
Yepes, Gustavo
Baldi, Anna Silvia
RASIA, ELENA 
Issue Date: 2018
Journal: MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY 
Number: 477
Issue: 1
First Page: 139
Abstract: The determination of the morphology of galaxy clusters has important repercussions for cosmological and astrophysical studies of them. In this paper, we address the morphological characterization of synthetic maps of the Sunyaev-Zel'dovich (SZ) effect for a sample of 258 massive clusters (M<SUB>vir</SUB> > 5 × 10<SUP>14</SUP> h<SUP>-1</SUP> M<SUB>☉</SUB> at z = 0), extracted from the MUSIC hydrodynamical simulations. Specifically, we use five known morphological parameters (which are already used in X-ray) and two newly introduced ones, and we combine them in a single parameter. We analyse two sets of simulations obtained with different prescriptions of the gas physics (non-radiative and with cooling, star formation and stellar feedback) at four red shifts between 0.43 and 0.82. For each parameter, we test its stability and efficiency in discriminating the true cluster dynamical state, measured by theoretical indicators. The combined parameter is more efficient at discriminating between relaxed and disturbed clusters. This parameter had a mild correlation with the hydrostatic mass (∼0.3) and a strong correlation (∼0.8) with the offset between the SZ centroid and the cluster centre of mass. The latter quantity is, thus, the most accessible and efficient indicator of the dynamical state for SZ studies.
URI: http://hdl.handle.net/20.500.12386/29564
URL: https://academic.oup.com/mnras/article-abstract/477/1/139/4970834
ISSN: 0035-8711
DOI: 10.1093/mnras/sty621
Bibcode ADS: 2018MNRAS.477..139C
Fulltext: open
Appears in Collections:1.01 Articoli in rivista

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