21-23 December 2020
Online meeting
Europe/Kiev timezone

Revisiting constraints on warm dark matter from the UV luminosity functions

22 Dec 2020, 11:10
Online meeting

Online meeting

Oral talk Astrophysics and Cosmology Astrophysics and Cosmology


Anton Rudakovskyi (Bogolyubov Institute for Theoretical Physics)


The ultra-violet luminosity functions (UV LFs) of the galaxies allow constraining the dark matter particle properties. In the warm dark matter scenario, the formation of low-mass galaxies is suppressed, which may impact the UV LFs.

We have performed the Bayesian inference on warm and cold dark matter scenarios via UV LFs at z=6, 7, 8. We have found that there is no significant preference for the CDM over WDM by comparing the Bayesian evidences. Knowing the bayesian evidences allows us to build the combined bounds on the model parameters via different datasets. We have derived the robust combined bound on the warm dark matter particle mass $m_\text{x}\geq2.1$ keV with 95% confidence level.

Primary authors

Anton Rudakovskyi (Bogolyubov Institute for Theoretical Physics) Denys Savchenko (Bogolyubov Institute for Theoretical Physics of the NAS of Ukraine)

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