9/21/09LUNAR Steering Committee Meeting GSFC Simulations of the Dark Ages Initial Plans

9/21/09LUNAR Steering Committee Meeting GSFC Work Plan

9/21/09LUNAR Steering Committee Meeting GSFC Initial Simulation Plans Study of the X-ray “pre-ionization” of the universe in the Dark Ages (z = 30-10) Propagate X-rays using the Radiative Transport version of Enzo (Norman et al) Effects of ionization and heating of the gas treated, feeding back to the hydro

9/21/09LUNAR Steering Committee Meeting GSFC Simulation Setup 2048^3 unigrid of 100 Mpc (comoving) simulated cube High mass resolution, so we get collapsed objects at high z Big grid can be run because we only run to high z

9/21/09LUNAR Steering Committee Meeting GSFC Source Population Parameter Study Method: find collapsed halos as they form, use some prescription to turn them on as X-ray sources Propagate X-rays, modifying the ionization state and T of the gas Look at the integrated (all-sky) and angular power spectrum of HI T_b.

9/21/09LUNAR Steering Committee Meeting GSFC