Multi-Scale Morphological Analysis of SDSS DR5 Survey using the Metric Space Technique

Details Multi-Scale Morphological Analysis of SDSS DR5 Survey using the Metric Space Technique Multi-Scale Morphological Analysis of SDSS DR5 Survey using the Metric Space Technique

2008-12-02

arxiv.org/abs/0812.0398v3

Astrophys.J.707:1160-1167,2009

Astronomy and Astrophysics

Astrophysics

Scientific paper

10.1088/0004-637X/707/2/1160

Following novel development and adaptation of the Metric Space Technique (MST), a multi-scale morphological analysis of the Sloan Digital Sky Survey (SDSS) Data Release 5 (DR5) was performed. The technique was adapted to perform a space-scale morphological analysis by filtering the galaxy point distributions with a smoothing Gaussian function, thus giving quantitative structural information on all size scales between 5 and 250 Mpc. The analysis was performed on a dozen slices of a volume of space containing many newly measured galaxies from the SDSS DR5 survey. Using the MST, observational data were compared to galaxy samples taken from N-body simulations with current best estimates of cosmological parameters and from random catalogs. By using the maximal ranking method among MST output functions we also develop a way to quantify the overall similarity of the observed samples with the simulated samples.

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