Analysis of the clustering of 2dFGRS galaxies using the method of a modified correlation gamma function |
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Authors: | A V Tikhonov |
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Institution: | (1) St. Petersburg State University, Universitetskii pr. 28, St. Petersburg, 198504, Russia |
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Abstract: | The apparatus of a correlation gamma function is used to analyze a sample of 2dFGRS galaxies. We suggest a modified gamma-function algorithm with nonintersecting working spheres, which ensures that the counts are independent at each step. The method of nonintersecting spheres has revealed a change in the regime of clustering (a break of the gamma function) on a scale of 10–16h?1 Mpc (H0 = 65 km s?1 Mpc?1). The standard method yields a scale of 30h?1 Mpc. An artificial distribution is used as an example to show that, in some cases, the modified algorithm is more responsive to a mixture of distributions with various properties than the standard method. |
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Keywords: | galaxies large-scale structure |
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