The Kormendy relation of cluster galaxies in PPS regions
We study a sample of 936 early-type galaxies located in 48 low-z regular galaxy clusters with $M_{200}\geq 10^{14}~ M_\odot$ at $z< 0.1$. We examine variations in the Kormendy relation (KR) according to their location in the projected phase space (PPS) of the clusters. We have used a combination...
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| Main Authors: | , , , , , , |
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| Format: | Journal Article |
| Language: | English |
| Published: |
15-02-2024
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| Subjects: | |
| Online Access: | Get full text |
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| Summary: | We study a sample of 936 early-type galaxies located in 48 low-z regular
galaxy clusters with $M_{200}\geq 10^{14}~ M_\odot$ at $z< 0.1$. We examine
variations in the Kormendy relation (KR) according to their location in the
projected phase space (PPS) of the clusters. We have used a combination of
Bayesian statistical methods to identify possible differences between the
fitted relations. Our results indicate that the overall KR is better fitted
when we take into account the information about PPS regions. We also find that
objects with time since infall $\geq 6.5$ Gyr have a significant statistical
difference of the KR coefficients relative to objects that are more recent in
the cluster environment. We show that giant central ellipticals are responsible
for tilting the KR relation towards smaller slopes. These galaxies present a
late growth probably due to cumulative preprocessing during infall, plus
cannibalism and accretion of smaller stripped objects near the center of the
clusters. |
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| DOI: | 10.48550/arxiv.2402.10278 |