2006/09/26 by XIN-FA DENG, Xin-Fa Deng, Peng Jiang +7
Physics and Astronomy · #Compact group #Galaxies: Formation, Evolution, Phenomena #Galaxy #Galaxy group #Red shift #Redshift #Redshift survey #Sample (material) #Scientific Research and Discoveries #Statistical Mechanics and Entropy #Statistical analysis #astro-ph
paper · pdf · doi:10.1142/s021827180701047x
published as Int.J.Mod.Phys.D16:885-898,2007 · 12 pages, 9 figures
arxiv created 2006/09/26 · openalex publication_date 2007/05/01 · arxiv updated 2009/12/01 · openalex created_date 2016/06/24 · openalex updated_date 2026/08/05
In order to explore the statistical properties of galaxy morphological types in compact groups (CGs), we construct a random group sample which has the same distributions of redshift and number of member galaxies as those of the CG sample. It turns out that the proportion of early-type galaxies in different redshift bins for the CG sample is statistically higher than that for random group sample, and with growing redshift z this kind of difference becomes more significant. This may be due to the existence of interactions and mergers within a significant fraction of SDSS CGs. We also compare statistical results of CGs with those of more compact groups and pairs, but do not observe as large statistical difference as Hickson's [Astrophys. J.255 (1982) 382] results.