Author(s)

Bruce Hoeneisen

Universidad San Francisco de Quito, Quito, Ecuador.

We compare the observed galaxy stellar mass distributions in the redshift range with expectations of the cold ΛCDM and warm ΛWDM dark matter models, and obtain the warm dark matter cut-off wavenumber: . This result is in agreement with the independent measurements with spiral galaxy rotation curves, confirms that k_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 k_fs. The data disfavors the ΛCDM model.

Dark Matter, Warm Dark Matter, Dark Matter Properties, Galaxy Stellar Mass

Hoeneisen, B. (2020) Cold or Warm Dark Matter?: A Study of Galaxy Stellar Mass Distributions. International Journal of Astronomy and Astrophysics, 10, 57-70. doi: 10.4236/ijaa.2020.102005.