Mass of a Galaxy and Dissipative Process in the Hot Universe
スポンサーリンク
概要
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Decay of the acoustic motions in an early stage of the hot universe is studied in detail. Considering a growth of density perturbation by gravitation and its decay by dissipative processes, i.e. viscosity and thermal conductivity, we can get a gross feature of the size spectrum of density inhomogeneity at the stage of recombination of the cosmic plasma. The size spectrum has a flat maximum between 10^<12-13> M_⨂ and 10^<17-18> M_⨂ . After the time of decoupling, the density perturbation evolves into a galaxy or a cluster of galaxies by the hydrodynamical instability. The maximum mass formed by this mechanism is given as 10^<14-15> M_⨂ , assuming the density perturbation δρ/ρ≃10^<-1>.
- 理論物理学刊行会の論文
- 1971-02-25
著者
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Sato Humitaka
Department Of Physics Kyoto Univesity
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Sato Humitaka
Department Of Physics Kyoto University
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Sato Humitaka
Department Of Nuclear Science Kyoto University
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