The scaling relation of early-type galaxies in clusters. II: Spectroscopic data for galaxies in eight nearby clusters

Abstract

AIMS: We present in this work low and intermediate resolution spectroscopic data collected for 152 early type galaxies in 8 nearby clusters with z $\le$ 0.10. METHODS: We use low resolution data to produce the redshift and the K-correction for every individual galaxy, as well as to give their overall spectral energy distribution, and some spectral indicators, including the 4000Åbreak, the Mg${}_2$ strength, and the NaD equivalent width.We have also obtained higher resolution data for early type galaxies in three of the clusters, to determine their central velocity dispersion. RESULTS: The effect of the resolution on the measured parameters is discussed. CONCLUSIONS: New accurate systemic redshift and velocity dispersion is presented for four of the surveyed clusters, A98, A3125, A3330, and DC2103-39. We have found that the K-correction values for E/S0 bright galaxies in a given nearby clusters are very similar. We also find that the distribution of the line indicators significantly differ from cluster to cluster.

arXiv comment16 pages, 9 figures, Accepted in A&A

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• The Morphological Content of Ten EDisCS Clusters at 0.5 < z < 0.8
• Merger Signatures in the Galaxy Cluster Abell 98
• Multicolor Photometry of the Galaxy Cluster A98: Substructures and Star Formation Properties