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Prog. Theor. Phys. Vol. 45 No. 2 (1971) pp. 370-385

[ Full Text PDF : FREE ACCESS (821K) ]

Mass of a Galaxy and Dissipative Process in the Hot Universe

Humitaka Satō

Department of Physics, Kyoto University, Kyoto

(Received September 14, 1970)

Abstract:

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 1012-13 M⊙ and 1017-18 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 1014-15 M⊙ assuming the density perturbation δρ/ρ≃10-1.


URL : http://ptp.ipap.jp/link?PTP/45/370/
DOI : 10.1143/PTP.45.370

[ Full Text PDF : FREE ACCESS (821K) ] Citation:

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  5. Progress of Theoretical Physics Vol. 54 No. 3 (1975) pp. 719-729 :
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  6. Progress of Theoretical Physics Vol. 63 No. 6 (1980) pp. 1971-1983 :
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  7. Progress of Theoretical Physics Vol. 76 No. 5 (1986) pp. 1016-1035 :
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  8. Progress of Theoretical Physics Vol. 88 No. 5 (1992) pp. 803-844 :
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  9. Progress of Theoretical Physics Supplement No.78 (1984) pp. 1-166 :
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