Abstract
Abstract The r-band of the Sloan Digital Sky Survey (SDSS) for 17,924 brightest cluster galaxies (BCGs) in clusters and groups within 0.02 ⩽ z ⩽ 0.20 are used to study possible environmental relations affecting the nature of these galaxies. We find a correlation between BCGs physical properties (the effective radius (Re ), absolute magnitude and central velocity dispersion (σ 0)) and their host groups and clusters velocity dispersion (σcl ). This type of relations suggests that the most massive groups or clusters host larger central galaxies. On the other hand, the σ 0/σcl ratio as a function of σcl is consistent with [10].
Highlights
Brightest cluster galaxies (BCGs) are considered as one from the interesting objects that can explain some unsolved problems in studying galaxies
The r-band of the Sloan Digital Sky Survey (SDSS) for 17,924 BCGs in clusters and groups within 0.02 z 0.20 are used to study possible environmental relations that influence the formation of these galaxies
We find a tight relation between effective radii of BCGs and velocity dispersions of their host clusters and groups
Summary
Brightest cluster galaxies (BCGs) are considered as one from the interesting objects that can explain some unsolved problems in studying galaxies. They are large, bright early type galaxies lying at centers of most galaxies groups and clusters. Understanding BCGs nature needs to study well environmental effects which affect on their physical properties [6, 7, 9]. In this work we present the sample and focus on investigating the relations between the physical properties of BCGs as the effective radii (Re), absolute magnitude, central velocity dispersions (σo) and the velocity dispersions of their host clusters and groups (σcl).
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