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<ri:Resource created="2023-10-31T15:06:41Z" status="active" updated="2025-05-19T09:50:00Z" version="1.2" xmlns:cs="http://www.ivoa.net/xml/ConeSearch/v1.0" xmlns:ri="http://www.ivoa.net/xml/RegistryInterface/v1.0" xmlns:vr="http://www.ivoa.net/xml/VOResource/v1.0" xmlns:vs="http://www.ivoa.net/xml/VODataService/v1.1" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:schemaLocation="http://www.ivoa.net/xml/ConeSearch/v1.0 http://vo.ari.uni-heidelberg.de/docs/schemata/ConeSearch.xsd http://www.ivoa.net/xml/VOResource/v1.0 http://vo.ari.uni-heidelberg.de/docs/schemata/VOResource.xsd http://www.ivoa.net/xml/VODataService/v1.1 http://vo.ari.uni-heidelberg.de/docs/schemata/VODataService.xsd" xsi:type="vs:CatalogService"><title>Dynamical state for 964 galaxy clusters</title><shortName>J/MNRAS/497/5485</shortName><identifier>ivo://CDS.VizieR/J/MNRAS/497/5485</identifier><altIdentifier>doi:10.26093/cds/vizier.74975485</altIdentifier><curation><publisher ivo-id="ivo://CDS">CDS</publisher><creator><name>Yuan Z.S.</name></creator><creator><name>Han J.L.</name></creator><date role="Updated">2024-09-02T20:15:59Z</date><date role="Created">2023-10-31T15:06:41Z</date><contact><name>CDS support team</name><address>CDS, Observatoire de Strasbourg, 11 rue de l'Universite, F-67000 Strasbourg, France</address><email>cds-question@unistra.fr</email></contact></curation><content><subject>galaxy-clusters</subject><subject>x-ray-sources</subject><subject>astrometry</subject><subject>redshifted</subject><description>The dynamical state of galaxy clusters describes if clusters are relaxed dynamically or in a merging process of subclusters. Using archival images from the Chandra X-ray Observatory, we derive a set of parameters to describe the dynamical state for 964 galaxy clusters. Three widely used indicators for dynamical state, the concentration index c, the centroid shift {omega}, and the power ratio P_3_/P_0_ are calculated in the circular central region with a radius of 500kpc. We also derive two adaptive parameters, the profile parameter {kappa} and the asymmetry factor {alpha}, in the best fitted elliptical region. The morphology index {delta} is then defined by combining these two adaptive parameters, which indicates the dynamical state of galaxy clusters and has good correlations to the concentration index c, the centroid shift {omega}, the power ratio P_3_/P_0_, and the optical relaxation factor {Gamma}. For a large sample of clusters, the dynamical parameters are continuously distributed from the disturbed to relaxed states with a peak in the between, rather than the bimodal distribution for the two states. We find that the newly derived morphology index {delta} works for the similar fundamental plane between the radio power, cluster mass, and the dynamical state for clusters with diffuse radio giant-haloes and mini-haloes. The offset between masses estimated from the Sunyaev-Zeldovich effect and X-ray images depends on dynamical parameters. All dynamical parameters for galaxy clusters derived from the Chandra archival images are available on http://zmtt.bao.ac.cn/galaxy_clusters/dyXimages/.</description><source format="bibcode">2020MNRAS.497.5485Y</source><referenceURL>https://cdsarc.cds.unistra.fr/viz-bin/cat/J/MNRAS/497/5485</referenceURL><type>Catalog</type><contentLevel>Research</contentLevel><relationship><relationshipType>IsServedBy</relationshipType><relatedResource ivo-id="ivo://CDS.VizieR/TAP">TAP VizieR generic service</relatedResource></relationship><relationship><relationshipType>IsServedBy</relationshipType><relatedResource>Conesearch service</relatedResource></relationship><relationship><relationshipType>related-to</relationshipType><relatedResource ivo-id="ivo://CDS.VizieR/IX/57">IX/57 : The Chandra Source Catalog (CSC), Release 2.0 (Evans+, 2019)</relatedResource><relatedResource ivo-id="ivo://CDS.VizieR/VII/110A">VII/110A : Rich Clusters of Galaxies (Abell+ 1989)</relatedResource><relatedResource ivo-id="ivo://CDS.VizieR/J/A+A/534/A109">J/A+A/534/A109 : MCXC Meta-Catalogue X-ray galaxy Clusters</relatedResource><relatedResource ivo-id="ivo://CDS.VizieR/J/ApJ/785/104">J/ApJ/785/104 : redMaPPer. 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