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Computing the X-Ray Universe Movie: text

Gas density evolution (co-moving frame)

Here we view the evolution of gas density with cosmic time, or redshift. Just as before, we display the results in a frame which is comoving with the expanding universe. Our volumetric rendering technique displays low density gas as blue and transparent, and high density gas as red and opaque.

Initially, the gas is smoothly distributed. As the density fluctuations grow, we see slender filaments appear, first in short segments, and then in longer strands exceeding one hundred million light years in length. Between the filaments are large quasi-spherical voids of very low density gas. The simulation is stopped at the present epoch so we may compare our results with the real universe.

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Copyright, (c) 1995: Board of Trustees, University of Illinois

NCSA. Last modified, 10/12/95