Formation of a void and galaxies in a neutrino-dominated universe |
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| Authors: | Masayuki Umemura Satoru Ikeuchi |
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| Institution: | (1) Department of Physics, Hokkaido University, Sapporo, Japan;(2) Tokyo Astronomical Observatory, University of Tokyo, Mitaka, Tokyo, Japan |
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| Abstract: | The recent discovery of the large  honeycomb structure of the Universe has triggered many models of the Universe dominated by dark matter. The neutrino-dominated universe is a favorable model for explaining the size of the large-scale structure and the dark matter of the larger scale than the galactic one. Our calculations on the evolution of density perturbations in a two-component universe composed of neutrinos and dissipative gas on a spherically-symmetric model have shown that the galactic scale does correlate the scale of a void of galaxies: if a neutrino has the mass of some tens eV, galaxies of the typical size form surrounding a typical void.Paper presented at the IAU Third Asian-Pacific Regional Meeting, held in Kyoto, Japan, between 30 September–6 October, 1984. |
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