A Study of Warm Dark Matter, the Missing Satellites Problem, and the UV Luminosity Cut-Off  

作　　者：Bruce Hoeneisen Bruce Hoeneisen(Universidad San Francisco de Quito, Quito, Ecuador)

机构地区：[1]Universidad San Francisco de Quito, Quito, Ecuador

出　　处：《International Journal of Astronomy and Astrophysics》2023年第1期25-38,共14页天文学与天体物理学国际期刊（英文）

摘　　要：In the warm dark matter scenario, the Press-Schechter formalism is valid only for galaxy masses greater than the “velocity dispersion cut-off”. In this work we extend the predictions to masses below the velocity dispersion cut-off, and thereby address the “Missing Satellites Problem” of the cold dark matter ΛCDM scenario, and the rest-frame ultra-violet luminosity cut-off required to not exceed the measured reionization optical depth. For warm dark matter we find agreement between predictions and observations of these two phenomena. As a by-product, we obtain the empirical Tully-Fisher relation from first principles.In the warm dark matter scenario, the Press-Schechter formalism is valid only for galaxy masses greater than the “velocity dispersion cut-off”. In this work we extend the predictions to masses below the velocity dispersion cut-off, and thereby address the “Missing Satellites Problem” of the cold dark matter ΛCDM scenario, and the rest-frame ultra-violet luminosity cut-off required to not exceed the measured reionization optical depth. For warm dark matter we find agreement between predictions and observations of these two phenomena. As a by-product, we obtain the empirical Tully-Fisher relation from first principles.

关 键 词：Cosmology: Dark Matter Galaxies: Statistics 

分 类 号：P15[天文地球—天文学]