Clusters of galaxies

Clusters of galaxies are the largest bound systems in the Universe. They are located at the knots of the cosmic web and therefore are important tracers of the large-scale structure of the Universe. They provide various environments for galaxies and affect their evolution. They are formed by merging process, hence have diverse states of dynamics shown in optical and X-ray images.

In early days, galaxy clusters were identified from optical surveys, as the most famous cluster catalog obtained by Abell and his successors. Recently, data of many large sky area surveys are available, such as the Sloan Digital Sky Survey (SDSS), SuperCOSMOS, the Wide-field Infrared Survey Explorer (WISE) and unWise, the Hyper Suprime-Cam Subaru strategic program (HSC-SSP), the Dark Energy Survey (DES) and the DESI Legacy Imaging Surveys. From these survey data, we have identified a great number of clusters of galaxies: See here:

Many catalogs of clusters of galaxies we obtained!

Based on these large samples of clusters and public data, we studied the properties of clusters, including dynamical states of clusters, radio emission from clusters, the constraints of cosmological parameters, and discovery of giant lensed arcs by clusters. See many details here!

Recently a new method to determine the dynamical states of clusters of galaxies has been developed. We got dynamical state evaluated for 964 X-ray clusters observed by the Chandra observatory and 1308 X-ray clusters observed by the XMM-Newton observatory. They are combined for form a sample of 1844 clusters with all dynamical states evaluated.

Publications:

Wen, Z. L., Han, J. L., & Yuan, Z. S. 2024, MNRAS, 532, 1849:
A catalogue of merging clusters of galaxies: cluster partners, merging subclusters, and post-collision clusters
Wen, Z. L., & Han, J. L. 2024, ApJS, 272, 39:
A catalog of 1.58 million clusters of galaxies identified from the DESI Legacy Imaging Surveys
Yuan, Z. S., Han, J. L., Bohringer, H., Wen, Z. L. & Chon, G. 2023, MNRAS, 523, 1364:
More relaxed intracluster gas than galaxies in clusters in quasi-equilibrium
Yuan, Z. S., & Wen, Z. L. 2022, MNRAS, 516, 3159:
The alignment between brightest cluster galaxies and host clusters
Wen, Z. L., & Han, J. L. 2022, MNRAS, 513, 3946:
Clusters of galaxies up to z=1.5 identified from photometric data of the Dark Energy Survey and unWISE
Yuan, Z. S., Han, J. L., & Wen, Z. L. 2022, MNRAS, 513, 3013:
Dynamical state of galaxy clusters evaluated from X-ray images
Wen, Z. L., & Han, J. L. 2021, MNRAS, 500, 1003:
Photometric redshifts for galaxies in the Subaru Hyper Suprime-Cam and unWISE and a catalogue of identified clusters of galaxies
Yuan, Z. S., & Han, J. L. 2020, MNRAS, 497, 5485:
Dynamical state for 964 galaxy clusters from Chandra X-ray images
Wen, Z. L., & Han, J. L. 2018, MNRAS, 481, 4158:
A sample of 1959 massive galaxy clusters at high redshifts
Wen, Z. L., Han, J. L., & Yang, F. 2018, MNRAS, 475, 343:
A catalogue of clusters of galaxies identified from all sky surveys of 2MASS, WISE, and SuperCOSMOS"
Yuan, Z. S., Han, J. L., & Wen, Z. L. 2016, MNRAS, 460, 3669:
Radio luminosity function of brightest cluster galaxies
Hong, T., Han, J. L., & Wen, Z. L. 2016, ApJ, 826, 154:
A Detection of Baryon Acoustic Oscillations from the Distribution of Galaxy Clusters
Yuan, Z. S., Han, J. L., & Wen, Z. L. 2015, ApJ, 813, 77:
The Scaling Relations and the Fundamental Plane for Radio Halos and Relics of Galaxy Clusters
Wen, Z. L., & Han, J. L. 2015, ApJ, 807, 178:
Calibration of the Optical Mass Proxy for Clusters of Galaxies and an Update of the WHL12 Cluster Catalog
Wen, Z. L., & Han, J. L. 2015, MNRAS, 448, 2:
Dependence of the bright end of composite galaxy luminosity functions on cluster dynamical states
Liang, S. M., Wen, Z. L., Han, J. L., & Jiang, Y. Y. 2014, SCPMA, 57, 1809:
Discovery of eight lensing clusters of galaxies
Wen, Z. L., & Han, J. L. 2013, MNRAS, 436, 275:
Substructure and dynamical state of 2092 rich clusters of galaxies derived from photometric data
Wen, Z. L., Han, J. L., & Liu, F. S. 2012, ApJS, 199, 34:
A Catalog of 132,684 Clusters of Galaxies Identified from Sloan Digital Sky Survey III
Hong, T., Han, J. L., Wen, Z. L., Sun, L., & Zhan, H. 2012, ApJ, 749, 81:
The Correlation Function of Galaxy Clusters and Detection of Baryon Acoustic Oscillations
Wen, Z. L., Han, J. L., & Jiang, Y. Y. 2011, RAA, 11, 1185:
Lensing clusters of galaxies in the SDSS-III
Wen, Z. L., & Han, J. L. 2011, ApJ, 734, 68:
Galaxy Clusters at High Redshift and Evolution of Brightest Cluster Galaxies
Wen, Z. L., Han, J. L., & Liu, F. S. 2010, MNRAS, 407, 533:
Mass function of rich galaxy clusters and its constraint on σ8
Wen, Z. L., Han, J. L., & Liu, F. S. 2009, ApJS, 193, 197:
Galaxy Clusters Identified from the SDSS DR6 and Their Properties
Wen, Z. L., Han, J. L., Xu, X. Y., et al. 2009, RAA, 9, 5:
Discovery of four gravitational lensing systems by clusters in the SDSS DR6