A new parameterization of the reionisation history
1 Institut d’Astrophysique Spatiale, Université Paris-Sud, CNRS, UMR8617, 91405 Orsay, France
2 IRAP, Université de Toulouse, UPS-OMP, CNRS, 14 avenue Edouard Belin, 31400 Toulouse, France
Received: 17 May 2015
Accepted: 28 June 2015
Motivated by the current constraints on the epoch of reionisation from recent cosmic microwave background observations, ionising background measurements of star-forming galaxies, and low redshifts line-of-sight probes, we propose a new data-motivated parameterisation of the history of the average ionisation fraction. This parameterisation describes a flexible redshift-asymmetric reionisation process in two regimes that is capable of fitting all the current constraints.
Key words: dark ages, reionization, first stars / large-scale structure of Universe / cosmic background radiation
© ESO, 2015