Constraints on reionization from the thermal history of the intergalactic medium. (2002)
Theuns, T., Schaye, J., Zaroubi, S., Kim, T-S., Tzanavaris, P., Carswell, B.
The temperature of the diffuse, photoheated intergalactic medium (IGM) depends on its reionization history because the thermal timescales are long. The widths of the hydrogen Lya absorption lines...