Warm Dark Matter and the Formation of First Galaxies
Warm Dark Matter and the Formation of First Galaxies作者机构：Universidad San Francisco de Quito Quito Ecuador
出 版 物：《Journal of Modern Physics》 (现代物理（英文）)
年 卷 期：2022年第13卷第6期
页 面：932-948页
学科分类：07[理学] 070401[理学-天体物理] 0704[理学-天文学]
主 题：Warm Dark Matter First Galaxies First Stars Population III Stars Reioniza-tion
摘 要：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 τ2(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 .
维普期刊数据库