Two confirmed compact elliptical galaxies in the Antlia cluster
Analia V. Smith Castelli, Favio R. Faifer, Lilia P. Bassino, Gisela A., Romero, Sergio A. Cellone, Tom Richtler
TL;DR
This paper reports the confirmation of two compact elliptical galaxies in the Antlia cluster, making it the nearest cluster with multiple such galaxies, and provides evidence of interaction in one case.
Contribution
First confirmation of multiple compact elliptical galaxies in the Antlia cluster, expanding knowledge of their distribution and interactions in galaxy clusters.
Findings
Two cE galaxies confirmed in Antlia cluster
Antlia is the nearest cluster with multiple cEs
Evidence of interaction with a giant elliptical
Abstract
We confirm the existence of two compact elliptical (cE) galaxies in the central region of the Antlia cluster through MAGELLAN-MIKE and GEMINI-GMOS spectra. Only about a dozen galaxies of this rare type are known today up to a distance of 100 Mpc. With this finding, Antlia becomes the nearest galaxy cluster harbouring more than one cE galaxy among its galaxy population. One of these galaxies shows evidence of interaction with one of the giant ellipticals that dominate the central region of the cluster.
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Taxonomy
TopicsGalaxies: Formation, Evolution, Phenomena · Astronomy and Astrophysical Research · Scientific Research and Discoveries