hot dark matter


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hot dark matter

Dark matter that consists of particles moving at speeds near to the speed of light. Since neutrinos have nonzero masses it is thought that they may contribute much of the hot dark matter in the Universe.

hot dark matter

[¦hät ¦därk ′mad·ər]
(astronomy)
A hypothetical type of dark matter consisting of entities that were not in thermal equilibrium in the early universe; possibilities include massive neutrinos and cosmic strings.
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Malaney adds that the low-energy bosons become cold dark matter, whereas the high-energy bosons become hot dark matter.