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Warm Dark Matter and the Formation of First Galaxies 被引量:2
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作者 Bruce Hoeneisen 《Journal of Modern Physics》 2022年第6期932-948,共17页
By numerical integration of hydro-dynamical equations, we study the formation of elliptical and spiral galaxies starting from primordial linear density-velocity-gravitational perturbations. Both dark matter and baryon... By numerical integration of hydro-dynamical equations, we study the formation of elliptical and spiral galaxies starting from primordial linear density-velocity-gravitational perturbations. Both dark matter and baryons are included. Warm dark matter perturbations acquire two low mass cut-offs: the free-streaming cut-off due to the power spectrum free-streaming cut-off factor &tau;<sup>2</sup>(k), and the velocity dispersion cut-off. The Press-Schechter mass distribution does not include velocity dispersion, and should not be used below the velocity dispersion cut-off mass. From the formation of first galaxies and reionization, we estimate limits on the non-relativistic warm dark matter velocity dispersion at expansion parameter , with . 展开更多
关键词 Warm Dark Matter First Galaxies First Stars Population III Stars reioniza-tion
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