| 单词 | hot dark matter |
| 释义 | > as lemmashot dark matter hot dark matter n. Astronomy dark matter consisting of non-baryonic particles whose motion soon after the big bang was very energetic. ΘΚΠ the world > the universe > diffused matter > [noun] > dark matter > types of cold dark matter1984 hot dark matter1984 1984 J. R. Primack & G. R. Blumenthal in NATO ASI Ser. C 117 166 We will consider here the physical and astrophysical implications of three classes of elementary particle DM [= Dark Matter] candidates, which we will call hot, warm, and cold. (We are grateful to Dick Bond for proposing this apt terminology.) Hot DM refers to particles, such as neutrinos, which were still in thermal equilibrium after the most recent phase transition in hot early universe.] 1984 Science 1 June 973/1 For cosmological purposes such particles are known as ‘cold’ dark matter, as opposed to ‘hot’ dark matter composed of massive neutrinos. 2002 Philos. Trans. (Royal Soc.) A. 360 1279 Early cosmological simulations showed that the galaxy distribution in a universe dominated by hot dark matter would not resemble that observed in our Universe. < as lemmas |
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