Hickson-like compact groups inhabiting different environments
A. Taverna, J.M. Salerno, I.V. Daza-Perilla, E. Diaz-Gimenez, A., Zandivarez, H.J. Martinez, A.N. Ruiz (OAC/UNC - IATE/CONICET/UNC)

TL;DR
This study analyzes the environments of Hickson-like compact galaxy groups in the Sloan Digital Sky Survey, revealing their distribution across cosmic structures and how environment influences their physical properties and galaxy evolution.
Contribution
It provides a detailed analysis of the environmental distribution of compact galaxy groups and their properties, highlighting the role of large-scale structures in galaxy evolution.
Findings
45% of CGs are non-embedded or isolated.
Embedded CGs are mostly in Loose Groups and Nodes.
CGs in Nodes have higher velocity dispersions and brighter galaxies.
Abstract
Although Compact Groups of galaxies (CGs) have been envisioned as isolated extremely dense structures in the Universe, it is accepted today that many of them could be not as isolated as thought. In this work, we study Hickson-like CGs identified in the Sloan Digital Sky Survey Data Release 16 to analyse these systems and their galaxies when embedded in different cosmological structures. To achieve this goal, we identify several cosmological structures where CGs can reside: Nodes of filaments, Loose Groups, Filaments and cosmic Voids. Our results indicate that 45 per cent of CGs do not reside in any of these structures, i.e., they can be considered non-embedded or isolated systems. Most of the embedded CGs are found inhabiting Loose Groups and Nodes, while there are almost no CGs residing well inside cosmic Voids. Some physical properties of CGs vary depending on the environment they…
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Taxonomy
TopicsGalaxies: Formation, Evolution, Phenomena · Astrophysics and Star Formation Studies · Cosmology and Gravitation Theories
