Abstract
We present constraints on the mass of warm dark matter (WDM) particles derived from the Lyman- flux power spectrum of 55 high-resolution HIRES spectra at . From the HIRES spectra, we obtain a lower limit of () if the WDM consists of early decoupled thermal relics and () for sterile neutrinos. Adding the Sloan Digital Sky Survey Lyman- flux power spectrum, we get and () for thermal relics and sterile neutrinos. These results improve previous constraints by a factor of 2.
- Received 12 August 2007
DOI:https://doi.org/10.1103/PhysRevLett.100.041304
©2008 American Physical Society