Earth-mass dark-matter haloes as the first structures in the early Universe

J. Diemand, B. Moore () and J. Stadel
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J. Diemand: University of Zurich
B. Moore: University of Zurich
J. Stadel: University of Zurich

Nature, 2005, vol. 433, issue 7024, 389-391

Abstract: Make the rough with the smooth The early Universe was almost completely smooth and homogeneous. But tiny fluctuations were hidden in the matter distribution, and 20 million years after the Big Bang these began to undergo gravitational collapse. Key to what happened next is the nature of the dark matter that makes up the bulk of the Universe. New supercomputer calculations, based on the assumption that a hypothetical particle known as the neutralino is the main component of the dark matter, suggest that the first structures to form in the Universe were Jupiter-mass dark matter haloes the size of the Solar System. The calculations suggest there are enough of these left for our Solar System to pass through a cloud of dark matter every 10,000 years. These results have implications for the many experiments under way and in the planning stage that aim to identify the nature of the dark matter.

Date: 2005
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DOI: 10.1038/nature03270

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