Comparison of the measurements of the thermal history, effective optical depth and Lya flux power spectrum from 3 simulations, all using our current fiducial rescaled P19 model:

\[\beta_{\mathrm{He}} = 0.46\] \[\beta_{\mathrm{H}} = 0.78\] \[\Delta z_{\mathrm{He}} = 0.28\] \[\Delta z_{\mathrm{H}} = 0.04\]

Thermal History

Effective Optical Depth

Lya Flux Power Spectrum

The P(k) from the low resolution simulation has significant differences from the higher resolution simulations for \(z>3.2\), the HI effective optical depth also is different at those redshifts. We might need to do a higher resolution simulation (\(4096^3\)) if we want to use a \(200^3\) Mpc/h volume.