The topology of large-scale structure. V - Two-dimensional topology of sky maps

Details The topology of large-scale structure. V - Two-dimensional topology of sky maps The topology of large-scale structure. V - Two-dimensional topology of sky maps

Jan 1992

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1992apj...385...26g&link_type=abstract

Astrophysical Journal, Part 1 (ISSN 0004-637X), vol. 385, Jan. 20, 1992, p. 26-31.

Astronomy and Astrophysics

Astrophysics

25

Astronomical Maps, Galactic Clusters, Galactic Structure, Topology, Two Dimensional Models, Dark Matter, Digital Simulation, Universe

Scientific paper

A 2D algorithm is applied to observed sky maps and numerical simulations. It is found that when topology is studied on smoothing scales larger than the correlation length, the topology is approximately in agreement with the random phase formula for the 2D genus-threshold density relation, G2(nu) varies as nu(e) exp-nu-squared/2. Some samples show small 'meatball shifts' similar to those seen in corresponding 3D observational samples and similar to those produced by biasing in cold dark matter simulations. The observational results are thus consistent with the standard model in which the structure in the universe today has grown from small fluctuations caused by random quantum noise in the early universe.

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