Europhys. Lett.
Volume 61, Number 6, March 2003
Page(s) 856 - 862
Section Geophysics, astronomy, and astrophysics
Published online 01 March 2003
DOI: 10.1209/epl/i2003-00317-0
Europhys. Lett., 61 (6) , pp. 856-862 (2003)

Luminosity segregation vs. fractal scaling in the galaxy distribution

M. Kerscher

Sektion Physik, Ludwig-Maximilians-Universität Theresienstraße 37, D-80333 München, Germany

(Received 21 August 2002; accepted in final form 17 January 2003)

In this letter I present results from a correlation analysis of three galaxy redshift catalogs: the SSRS2, the CfA2 and the PSCz. I will focus on the observation that the amplitude of the two-point correlation function rises if the depth of the sample is increased. There are two competing explanations for this observation: one in terms of a fractal scaling, the other based on luminosity segregation. I will show that there is strong evidence that the observed growth is due to a luminosity-dependent clustering of the galaxies.

98.65.-r - Galaxy groups, clusters, and superclusters; large scale structure of the Universe.
98.62.Ve - Statistical and correlative studies of properties (luminosity and mass functions; mass-to-light ratio; Tully-Fisher relation, etc.).
89.75.Da - Systems obeying scaling laws.

© EDP Sciences 2003