Cold or Warm Dark Matter?: A Study of Galaxy Stellar Mass Distributions  

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》2020年第2期57-70,共14页天文学与天体物理学国际期刊（英文）

摘　　要：We compare the observed galaxy stellar mass distributions in the redshift range <img src="Edit_bc01f6dd-d7f9-42f9-9db0-dbd1148de50e.png" alt="" />with expectations of the cold ΛCDM and warm ΛWDM dark matter models, and obtain the warm dark matter cut-off wavenumber: <img src="Edit_ab3d491d-7145-4d59-b4b1-bea473d62333.png" alt="" />. This result is in agreement with the independent measurements with spiral galaxy rotation curves, confirms that <em>k</em>_fs is due to warm dark matter free-streaming, and is consistent with the scenario of dark matter with no freeze-in and no freeze-out. Detailed properties of warm dark matter can be derived from <em>k</em>_fs. The data disfavors the ΛCDM model.We compare the observed galaxy stellar mass distributions in the redshift range <img src="Edit_bc01f6dd-d7f9-42f9-9db0-dbd1148de50e.png" alt="" />with expectations of the cold ΛCDM and warm ΛWDM dark matter models, and obtain the warm dark matter cut-off wavenumber: <img src="Edit_ab3d491d-7145-4d59-b4b1-bea473d62333.png" alt="" />. This result is in agreement with the independent measurements with spiral galaxy rotation curves, confirms that <em>k</em>_fs is due to warm dark matter free-streaming, and is consistent with the scenario of dark matter with no freeze-in and no freeze-out. Detailed properties of warm dark matter can be derived from <em>k</em>_fs. The data disfavors the ΛCDM model.

关 键 词：Dark Matter Warm Dark Matter Dark Matter Properties Galaxy Stellar Mass 

分 类 号：TN9[电子电信—信息与通信工程]