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Dynamical state for 964 galaxy clusters from Chandra X-ray images
Yuan, Z. S.1,2; Han, J. L.1,2,3
2020-10-01
Source PublicationMONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY
ISSN0035-8711
Volume497Issue:4Pages:5485-5497
AbstractThe 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 500 kpc. 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/.
Keywordgalaxies: clusters: general galaxies: clusters: intracluster medium
Funding OrganizationNational Natural Science Foundation of China ; National Natural Science Foundation of China ; Young Researcher Grant of National Astronomical Observatories, Chinese Academy of Sciences ; Young Researcher Grant of National Astronomical Observatories, Chinese Academy of Sciences ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; Young Researcher Grant of National Astronomical Observatories, Chinese Academy of Sciences ; Young Researcher Grant of National Astronomical Observatories, Chinese Academy of Sciences ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; Young Researcher Grant of National Astronomical Observatories, Chinese Academy of Sciences ; Young Researcher Grant of National Astronomical Observatories, Chinese Academy of Sciences ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; Young Researcher Grant of National Astronomical Observatories, Chinese Academy of Sciences ; Young Researcher Grant of National Astronomical Observatories, Chinese Academy of Sciences
DOI10.1093/mnras/staa2363
WOS KeywordSUNYAEV-ZELDOVICH ; RICH CLUSTERS ; SCALING RELATIONS ; COOLING FLOWS ; SUBSTRUCTURE ; SAMPLE ; ROSAT ; MASS ; EVOLUTION ; CORE
Language英语
Funding ProjectNational Natural Science Foundation of China[11803046] ; National Natural Science Foundation of China[11988101] ; National Natural Science Foundation of China[11833009] ; Young Researcher Grant of National Astronomical Observatories, Chinese Academy of Sciences
Funding OrganizationNational Natural Science Foundation of China ; National Natural Science Foundation of China ; Young Researcher Grant of National Astronomical Observatories, Chinese Academy of Sciences ; Young Researcher Grant of National Astronomical Observatories, Chinese Academy of Sciences ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; Young Researcher Grant of National Astronomical Observatories, Chinese Academy of Sciences ; Young Researcher Grant of National Astronomical Observatories, Chinese Academy of Sciences ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; Young Researcher Grant of National Astronomical Observatories, Chinese Academy of Sciences ; Young Researcher Grant of National Astronomical Observatories, Chinese Academy of Sciences ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; Young Researcher Grant of National Astronomical Observatories, Chinese Academy of Sciences ; Young Researcher Grant of National Astronomical Observatories, Chinese Academy of Sciences
WOS Research AreaAstronomy & Astrophysics
WOS SubjectAstronomy & Astrophysics
WOS IDWOS:000587739300107
PublisherOXFORD UNIV PRESS
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Document Type期刊论文
Identifierhttp://ir.bao.ac.cn/handle/114a11/81079
Collection中国科学院国家天文台
Corresponding AuthorHan, J. L.
Affiliation1.Chinese Acad Sci, Natl Astron Observ, 20A Datun Rd, Beijing 100101, Peoples R China
2.Chinese Acad Sci, CAS Key Lab FAST, NAOC, Beijing 100101, Peoples R China
3.Univ Chinese Acad Sci, Sch Astron, Beijing 100049, Peoples R China
Recommended Citation
GB/T 7714
Yuan, Z. S.,Han, J. L.. Dynamical state for 964 galaxy clusters from Chandra X-ray images[J]. MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY,2020,497(4):5485-5497.
APA Yuan, Z. S.,&Han, J. L..(2020).Dynamical state for 964 galaxy clusters from Chandra X-ray images.MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY,497(4),5485-5497.
MLA Yuan, Z. S.,et al."Dynamical state for 964 galaxy clusters from Chandra X-ray images".MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY 497.4(2020):5485-5497.
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