Jena 2013 – wissenschaftliches Programm
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GR: Fachverband Gravitation und Relativitätstheorie
GR 14: Kosmologie II
GR 14.5: Vortrag
Donnerstag, 28. Februar 2013, 17:30–17:45, HS 6
Minkowski functionals of the Sloan Digital Sky Survey — •Alexander Wiegand1, Thomas Buchert2, and Matthias Ostermann3 — 1Albert Einstein Institut, Golm — 2CRAL, Lyon — 3LMU, München
In this talk, we present the results of our analysis of the structure in the Galaxy distribution of the Sloan Digital Sky Survey, that we performed with the help of Minkowski functionals. With the discovery of larger and larger coherent structures, it is worthwhile to test the consistency of the observations with the standard models of structure formation. In particular we use the boolean grain model, that allows a very precise and robust comparison. In addition, the Minkowski functionals in this model may be analytically related to a series of the (higher order) correlation functions of the distribution. This allows us to quantify the influence of higher order clustering beyond the simple two point correlations. Comparing the Minkowski functionals to a set of N-body simulations we find a small, but significant deviation of the observed structure from the simulated one.