PROBING WARM DARK MATTER. “The linear power spectrum, and hence the mass of WDM particles, can be probed via the Lyman-alpha forest. The Lyman-alpha forest is the absorption lines in spectra of galaxies and quasars from the Lyman-alpha electron transition in intergalactic neutral hydrogen ‘clouds’.” (WDM = Warm dark matter).
https://lnkd.in/e6ifiQMn