A non-parametric analysis of the luminosity function of cluster galaxies.

Astronomy and Astrophysics – Astrophysics

Scientific paper

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Clusters Of Galaxies: Luminosity Function, Galaxies: Luminosity Function

Scientific paper

Photographic F band photometry of a sample of 36 Abell clusters, has been used to study possible systematic differences between the luminosity functions of galaxies belonging to clusters of different Rood & Sastry type. A Kolmogorov-Smirnov two-sample test shows that the average luminosity functions of clusters of various type differ in a statistically significant way. In particular core and linear clusters appear intermediate between cD and flat or irregular clusters. The results appear consistent with the cannibalism model, where the luminosity function evolves through a merging process which affects preferentially the bright end of their luminosity function.

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