Astronomy and Astrophysics – Astrophysics
Scientific paper
2006-02-27
Astronomy and Astrophysics
Astrophysics
16 pages, 9 figures, Accepted in A&A
Scientific paper
10.1051/0004-6361:20054617
AIMS: We present in this work low and intermediate resolution spectroscopic data collected for 152 early type galaxies in 8 nearby clusters with z $\leq$ 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 4000\AA break, 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.
Bettoni Daniela
Fasano Giancarmine
Kjaergaard Per
Moles Mariano
Varela Jaime
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