The Blooming Tree Algorithm at Work: Clusters, Filaments and Superclusters in the Field of A2029

Abstract

The Blooming Tree (BT) algorithm, based on the hierarchical clustering method, is designed to identify clusters, groups, and substructures from galaxy redshift surveys. We apply the BT algorithm to a wide-field ($10\times 10$ deg${}^2$) spectroscopic dataset centered on the galaxy cluster A2029. The BT algorithm effectively identifies all the X-ray luminous clusters and most of the optical clusters known in the literature, numerous groups, and the filaments surrounding the clusters, associating a list of galaxy members to each structure. By lowering the detection threshold, the BT algorithm also identifies the three superclusters in the field. The BT algorithm arranges the clusters and groups that make up the superclusters in a hierarchical tree according to their pairwise binding energy: the algorithm thus unveils the possible accretion history of each supercluster and their future evolution. These results show how the BT algorithm can represent a crucial tool to investigate the formation and evolution of cosmic structures on non-linear and mildly non-linear scales.

14 pages, 10 figures, accepted by ApJ, comments are welcome

References in corpus (39)

• SciPy 1.0--Fundamental Algorithms for Scientific Computing in Python
• Astropy: A Community Python Package for Astronomy
• Spectroscopic Target Selection in the Sloan Digital Sky Survey: The Main Galaxy Sample
• Galaxy Groups in the SDSS DR4: I. The Catalogue and Basic Properties
• The 2MASS Redshift Survey - Description and Data Release
• Galaxy and Mass Assembly (GAMA): The GAMA Galaxy Group Catalogue (G3Cv1)
• The Eighteenth Data Release of the Sloan Digital Sky Surveys: Targeting and First Spectra from SDSS-V
• Phase-space Analysis in the Group and Cluster environment: Time since Infall and Tidal Mass Loss
• Optical and X-ray clusters as tracers of the supercluster-void network. I Superclusters of Abell and X-ray clusters
• Disentangling satellite galaxy populations using orbit tracking in simulations
• Brightest Cluster Galaxies at the Present Epoch
• SDSS DR7 superclusters. The catalogues
• The eROSITA Final Equatorial-Depth Survey (eFEDS): Catalog of galaxy clusters and groups
• Measuring the escape velocity and mass profiles of galaxy clusters beyond their virial radius
• Superclusters of galaxies from the 2dF redshift survey. I. The catalogue
• DESI 2024 II: Sample Definitions, Characteristics, and Two-point Clustering Statistics
• The roadmap for unification in galaxy group selection:. I. A search for extended X-ray emission in the CNOC2 survey
• Friends-of-friends galaxy group finder with membership refinement. Application to the local Universe
• X-ray observations of the galaxy cluster Abell 2029 to the virial radius
• Identification of members in the central and outer regions of galaxy clusters
• Two New Catalogues of Superclusters of Abell/ACO Galaxy Clusters out to redshift 0.15
• The Velocity Dispersion Function of Very Massive Galaxy Clusters: Abell 2029 and Coma
• Characterising filaments in the SDSS volume from the galaxy distribution
• Cosmic Web Reconstruction through Density Ridges: Catalogue
• Multiscale probability mapping: groups, clusters and an algorithmic search for filaments in SDSS
• Future virialized structures: An analysis of superstructures in SDSS-DR7
• Apparent high metallicity in 3-4 keV galaxy clusters: the inverse iron-bias in action in the case of the merging cluster Abell 2028
• Inside a Beehive: the Multiple Merging Processes in the Galaxy Cluster Abell 2142
• Identification of galaxy cluster substructures with the Caustic method
• Search for gas bulk motions in eight nearby clusters of galaxies with Suzaku
• The unrelaxed dynamical structure of the galaxy cluster Abell 85
• Hierarchical Clustering in Astronomy
• GalWeight Application: A publicly-available catalog of dynamical parameters of 1,800 galaxy clusters from SDSS-DR13, ($GalWCat19$)
• The Massively Accreting Cluster A2029
• MCXC-II: Second release of the Meta-Catalogue of X-Ray detected Clusters of galaxies
• A Complete Spectroscopic Census of Abell 2029: A Tale of Three Histories
• The Cosmic Large-Scale Structure in X-rays (CLASSIX) cluster survey IV: Superclusters in the local Universe at z <= 0.03
• Blooming Trees: Substructures and Surrounding Groups of Galaxy Clusters
• The MeSsI (Merging Systems Identification) Algorithm & Catalogue