JWST high-redshift galaxy constraints on warm and cold dark matter models

Context. Warm dark matter is a possible alternative to cold dark matter to explain cosmological structure formation.
Aims: We study the implications of the latest JWST data on the nature of dark matter.
Methods: We compare properties of high-redshift galaxies observed by JWST with hydrodynamical simulations, in the standard cold dark matter model and in warm dark matter models with a suppressed linear matter power spectrum
Results: We find that current data are neither in tension with cold dark matter nor with warm dark matter models with m_WDM > 2 keV, since they probe bright and rare objects whose physical properties are similar in the different scenarios.
Conclusions: We also show how two observables, the galaxy luminosity functions and the galaxy correlation function at small scales of faint objects, can be promising tools for discriminating between the different dark-matter scenarios. Further hints may come from early stellar-mass statistics and galaxy CO emission.