The Three Hundred project: quest of clusters of galaxies morphology and dynamical state through Zernike polynomials

被引：32

作者：

Capalbo, Valentina ^{[1
]}

De Petris, Marco ^{[1
]}

De Luca, Federico ^{[1
,2
]}

Cui, Weiguang ^{[3
]}

Yepes, Gustavo ^{[4
,5
]}

Knebe, Alexander ^{[4
,5
,6
]}

Rasia, Elena ^{[7
,8
]}

机构：

[1] Sapienza Univ Roma, Dipartimento Fis, Piazzale Aldo Moro 5, I-00185 Rome, Italy

[2] Univ Roma Tor Vergata, Dipartimento Fis, Via Ric Sci 1, I-00133 Rome, Italy

[3] Univ Edinburgh, Inst Astron, Royal Observ, Edinburgh EH9 3HJ, Midlothian, Scotland

[4] Univ Autonoma Madrid, Fac Ciencias, Dept Fis Teor, Modulo 8, E-28049 Madrid, Spain

[5] Univ Autonoma Madrid, Ctr Invest Avanzada Fis Fundamental CIAFF, Fac Ciencias, E-28049 Madrid, Spain

[6] Univ Western Australia, Int Ctr Radio Astron Res, 35 Stirling Highway, Crawley, WA 6009, Australia

[7] Natl Inst Astrophys, Astron Observ Trieste INAF OATs, Via Tiepolo 11, I-34131 Trieste, Italy

[8] Universe IFPU, Inst Fundamental Phys, Via Beirut 2, I-34014 Trieste, Italy

来源：

MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY | 2021年 / 503卷 / 04期

基金：

欧洲研究理事会;

关键词：

methods: numerical; galaxies: clusters: general; galaxies: clusters: intracluster medium; ATACAMA COSMOLOGY TELESCOPE; X-RAY-CLUSTERS; NONTHERMAL PRESSURE; BRIGHTEST CLUSTER; EVOLUTION; SAMPLE; SUBSTRUCTURE; CONSTRAINTS; IMAGES; CAMERA;

D O I：

10.1093/mnras/staa3900

中图分类号：

P1 [天文学];

学科分类号：

0704 ;

摘要：

The knowledge of the dynamical state of galaxy clusters allows to alleviate systematics when observational data from these objects are applied in cosmological studies. Evidence of correlation between the state and the morphology of the clusters is well studied. The morphology can be inferred by images of the surface brightness in the X-ray band and of the thermal component of the Sunyaev-Zel'dovich (tSZ) effect in the millimetre range. For this purpose, we apply, for the first time, the Zernike polynomial decomposition, a common analytical approach mostly used in adaptive optics to recover aberrated radiation wavefronts at the telescopes pupil plane. With this novel way, we expect to correctly infer the morphology of clusters and so possibly their dynamical state. To verify the reliability of this new approach, we use more than 300 synthetic clusters selected in THE THREE HUNDRED project at different redshifts ranging from 0 up to 1.03. Mock maps of the tSZ, quantified with the Compton parameter, y-maps, are modelled with Zernike polynomials inside R-500, the cluster reference radius. We verify that it is possible to discriminate the morphology of each cluster by estimating the contribution of the different polynomials to the fit of the map. The results of this new method are correlated with those of a previous analysis made on the same catalogue, using two parameters that combine either morphological or dynamical-state probes. We underline that instrumental angular resolution of the maps has an impact mainly when we extend this approach to high-redshift clusters.

引用

页码：6155 / 6169

页数：15

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