Abstract
We explore the evolution of the early-type galaxy population in the rich cluster Abell 2390 at z=0.23. For this purpose, we have obtained spectroscopic data of 51 elliptical and lenticular galaxies with MOSCA at the 3.5 m telescope on Calar Alto Observatory. As our investigation spans both a broad range in luminosity (–22.3≤MB≤–:19.3)and a wide field of view (10′×10′), the environmental dependence of different formation scenarios can be analysed in detail as a function of radius from the cluster center. In this paper, we present first results on the Faber-Jackson relation and, for a subsample of 14 galaxies with morphological and structural parameters from HST, we also investigate the evolution of the Kormendy relation and the Fundamental Plane. We find a mild luminosity evolution of the early-type galaxies in Abell 2390: our objects are on average brighter by m B∼0.4 mag.
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Fritz, A., Ziegler, B., Bower, R. et al. The Evolutionary Status of Early-type Galaxies in Abell 2390. Astrophysics and Space Science 285, 61–66 (2003). https://doi.org/10.1023/A:1024665927138
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DOI: https://doi.org/10.1023/A:1024665927138