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Gravitational Clustering in an Expanding Universe: text
Initial Power Spectrum P(k) proportional to K^2
Different cold dark matter models were tested for their ability to form
large-scale structures through gravity alone. The frame
represents a spatial
scale millions of light-years across. Filaments visible in both movies
resemble
giant galaxy superclusters or sheets observed at similar scales. Billions of
years of evolution are traversed in these animations, spanning 1 million
years after the Big Bang to present day.
The two simulations presented here differ only in their starting conditions
denoted by the "Initial Power Spectrum." Low density regions where no
galaxies
would form are black. Increasing matter density is shaded into blue, yellow,
then green.
- Researcher: Adrian Melott; Dept. of Physics and Astronomy,
University of Kansas
- Visualization: Adrian Melott; Michael Krogh, formerly at NCSA
- Postproduction: Geiken,Cordelia Baron; Rosenstein,Jay; NCSA
- Copyright (c)1991, The Board of Trustees of the University of Illinois
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Copyright, (c) 1995: Board of Trustees, University of
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NCSA. Last modified, 10/11/95