T5.3 Large Scale Clustering in the universe - a Package

Ivan Valtchanov (Institute of Astronomy, Bulgaria )

Reference URL: http://www.astro.bas.bg/~ivan

A package of codes to explore the clustering in the Universe is being collected. It includes most of the steps required in analyzing qualitatively and quantitatively how matter is organized into structures. The package includes the following general procedures

(i)

search for selection effects (distance, galactic or supergalactic latitude, possible selection on longitude and declination);

(ii)

search for substructures through uses of various techniques (hierarchy analyses, gaussian filtering, adaptive kernel estimates, multiscale wavelet analysis);

(iii)

finding groups of objects - galaxies $\rightarrow$ groups, galaxies $\rightarrow$ clusters, groups $\rightarrow$ supergroups?, clusters $\rightarrow$ superclusters, superclusters $\rightarrow$ ?;

(iv)

correlation function analysis for the 2D case as well as in redshift space and real space;

(v)

estimates of void probability function in 2D and 3D.

Most of the codes are developed for our particular need for studying the large scale clustering in the Universe. Parts of the codes implement generally available procedures and original ideas from different authors.