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- Title
Galaxy Cluster A 2142: Halo Boundary, "Red Sequence", Properties of Galaxies Based on SDSS.
- Authors
Kopylova, F. G.; Kopylov, A. I.
- Abstract
Abstract—Here we present results of studying the dynamics of galaxies, properties of early-type galaxies, properties of galaxies with the quenched star formation (QGs) in the A 2142 cluster based on the archival data from the Sloan Digital Sky Survey Data (SDSS DR10). We found the observed halo boundary, the "splashback" radius , which is equal to 4.12 Mpc () and 4.06 Mpc () over the integral distribution of the number of galaxies as a function of the squared distance from the center. We have studied how early-type galaxies are distributed in the center and in the outskirts of the cluster ( < 3, ) and plotted the "red sequence" in the form of . Among all the cluster galaxies, the galaxies with the quenched star formation ( yr yr ) make up about one third. We have found that the fraction of QGs beyond the "splashback" radius is the same as in the field at the same with coordinates of the center of ° and a size of 300′. For galaxies with the stellar masses (this is the main mass range of QGs), when entering the cluster, there is a decrease in the radii by about when moving towards the center.
- Subjects
SLOAN Digital Sky Survey; GALAXIES; GALAXY clusters; STELLAR mass; STAR formation; GALACTIC dynamics; GALACTIC evolution
- Publication
Astrophysical Bulletin, 2022, Vol 77, Issue 1, p22
- ISSN
1990-3413
- Publication type
Article
- DOI
10.1134/S1990341322010059