Figure 4

Power spectrum of Lyman- α flux from 3 Nyx simulations using the Gimlet analysis code, compared to observational data presented in Viel et al. ( 2013 ). The black line is the result of a ΛCDM cosmological model with the reionization history described in Haardt and Madau (2012). The blue and red lines are two WDM models, differing in their choice of dark matter particle mass: \(m_{\text{DM}} = 0.85~{\text{keV}}\) (blue) and \(m_{\text{DM}} = 2.1~{\text{keV}}\) (red).