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- Title
Astroparticle Constraints from the Cosmic Star Formation Rate Density at High Redshift: Current Status and Forecasts for JWST.
- Authors
Gandolfi, Giovanni; Lapi, Andrea; Ronconi, Tommaso; Danese, Luigi
- Abstract
We exploit the recent determination of the cosmic star formation rate (SFR) density at high redshifts z ≳ 4 to derive astroparticle constraints on three common dark matter (DM) scenarios alternative to standard cold dark matter (CDM): warm dark matter (WDM), fuzzy dark matter (ψ DM) and self-interacting dark matter (SIDM). Our analysis relies on the ultraviolet (UV) luminosity functions measured from blank field surveys by the Hubble Space Telescope out to z ≲ 10 and down to UV magnitudes M UV ≲ − 17 . We extrapolate these to fainter yet unexplored magnitude ranges and perform abundance matching with the halo mass functions in a given DM scenario, thus, obtaining a redshift-dependent relationship between the UV magnitude and the halo mass. We then computed the cosmic SFR density by integrating the extrapolated UV luminosity functions down to a faint magnitude limit M UV lim , which is determined via the above abundance matching relationship by two free parameters: the minimum threshold halo mass M H GF for galaxy formation, and the astroparticle quantity X characterizing each DM scenario (namely, particle mass for WDM and ψ DM, and kinetic temperature at decoupling T X for SIDM). We perform Bayesian inference on such parameters using a Monte Carlo Markov Chain (MCMC) technique by comparing the cosmic SFR density from our approach to the current observational estimates at z ≳ 4 , constraining the WDM particle mass to m X ≈ 1. 2 − 0.4 (− 0.5) + 0.3 (11.3) keV, the ψ DM particle mass to m X ≈ 3. 7 − 0.4 (− 0.5) + 1.8 (+ 12.9. 3) × 10 − 22 eV, and the SIDM temperature to T X ≈ 0. 21 − 0.06 (− 0.07) + 0.04 (+ 1.8) keV at 68 % ( 95 % ) confidence level. Finally, we forecast how such constraints will be strengthened by upcoming refined estimates of the cosmic SFR density if the early data on the UV luminosity function at z ≳ 10 from the James Webb Space Telescope (JWST) will be confirmed down to ultra-faint magnitudes.
- Subjects
JAMES Webb Space Telescope (Spacecraft); GALAXY formation; STELLAR luminosity function; STAR formation; DARK matter; MARKOV chain Monte Carlo; SPACE telescopes; REDSHIFT
- Publication
Universe (2218-1997), 2022, Vol 8, Issue 11, p589
- ISSN
2218-1997
- Publication type
Article
- DOI
10.3390/universe8110589