English

Are James Webb Space Telescope observations consistent with warm dark matter?

Astrophysics of Galaxies 2024-01-18 v1

Abstract

We compare observed with predicted distributions of galaxy stellar masses MM_* and galaxy rest-frame ultra-violet luminosities per unit bandwidth LUVL_{UV}, in the redshift range z=2z = 2 to 13. The comparison is presented as a function of the comoving warm dark matter free-streaming cut-off wavenumber kfsk_{fs}. For this comparison the theory is a minimal extension of the Press-Schechter formalism with only two parameters: the star formation efficiency, and a proportionality factor between the star formation rate per galaxy and LUVL_{UV}. These two parameters are fixed to their values obtained prior to the James Webb Space Telescope (JWST) data. The purpose of this comparison is to identify if, and where, detailed astrophysical evolution is needed to account for the new JWST observations.

Keywords

Cite

@article{arxiv.2401.08730,
  title  = {Are James Webb Space Telescope observations consistent with warm dark matter?},
  author = {Bruce Hoeneisen},
  journal= {arXiv preprint arXiv:2401.08730},
  year   = {2024}
}

Comments

18 pages, 5 figures

R2 v1 2026-06-28T14:18:35.252Z