Characteristic Scales of Initial Density and Velocity Fields(Astrophysics and Cosmology)
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概要
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For the initial fields of the density contrast and peculiar velocity, we theoretically calculate the 'differential' and 'integral' length scales, i.e., statistical measures that respectively characterize the small- and large-scale fluctuations of a random field. These length scales and the associated mass scales explain the length and mass scales observed for (1) halos of young galaxies at z≳5, (2) halos of galaxies at z≃0, and (3) the largest structures in the galaxy distribution at z≃0. We thereby discuss that such observed scales are fossil imprints of the characteristic scales of the initial fields.
- 2010-01-25
著者
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TANIGUCHI Yoshiaki
Research Center for Space and Cosmic Evolution, Ehime University
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MOURI Hideaki
Meteorological Research Institute
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Taniguchi Yoshiaki
Research Center For Space And Cosmic Evolution Ehime University
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- Characteristic Scales of Initial Density and Velocity Fields(Astrophysics and Cosmology)
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