Disentangling the Cosmic Web I: Morphology of Isodensity Contours

Details Disentangling the Cosmic Web I: Morphology of Isodensity Contours Disentangling the Cosmic Web I: Morphology of Isodensity Contours

1999-04-28

arxiv.org/abs/astro-ph/9904384v2

Astrophys.J.526:568-578,1999

Astronomy and Astrophysics

Astrophysics

26 pages including 12 figures. Accepted for publication in ApJ

Scientific paper

10.1086/308039

We apply Minkowski functionals and various derived measures to decipher the morphological properties of large-scale structure seen in simulations of gravitational evolution. Minkowski functionals of isodensity contours serve as tools to test global properties of the density field. Furthermore, we identify coherent objects at various threshold levels and calculate their partial Minkowski functionals. We propose a set of two derived dimensionless quantities, planarity and filamentarity, which reduce the morphological information in a simple and intuitive way. Several simulations of the gravitational evolution of initial power-law spectra provide a framework for systematic tests of our method.

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