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Date and Time of the Query: 2019-07-19 T22:15:53 PDT
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For refcode 2003A&A...408...57M:
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Copyright by European Southern Observatory (ESO). Reproduced by permission
2003A&A...408...57M Optical luminosity functions of the Abell galaxy cluster ABCG 209 at z = 0.21 A. Mercurio, M. Massarotti, P. Merluzzi, M. Girardi, F. La Barbera and G. Busarello Received 27 February 2003 / Accepted 19 June 2003 We derive the luminosity functions in three bands (BVR) for the rich galaxy cluster ABCG 209 at z=0.21. The data cover an area of 78 arcmin in the B and R bands, while a mosaic of three pointings was obtained in the V band, covering an area of approximately 160 arcmin . The galaxy sample is complete to B = 22.8 ( N_gal_ = 339), V = 22.5 ( N_gal_ = 1078) and R = 22.0 ( N_gal_ = 679). Although the fit of a single Schechter function cannot be rejected in any band, the luminosity functions are better described by a sum of two Schechter functions for bright and faint galaxies, respectively. There is an indication for a presence of a dip in the luminosity functions in the range V = 20.5-21.5 and R = 20.0-21.0. We find a marked luminosity segregation, in the sense that the number ratio of bright-to-faint galaxies decreases by a factor 4 from the center to outer regions. Our analysis supports the idea that ABCG 209 is an evolved cluster, resulting from the merger of two or more sub-clusters. Keywords: galaxies: clusters: individual: Abell 209, galaxies: photometry, galaxies: luminosity function, mass function
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