Exploring the thermal state of the low-density intergalactic medium atz = 3 with an ultrahigh signal-to-noise QSO spectrum

• DOI: 10.1093/mnras/stw2917
• Publication Date: 2016-11-10T12:05:40Z
• Authors: A. Rorai; G. D. Becker; M. G. Haehnelt; R. F. Carswell; J. S. Bolton; S. Cristiani; V. D'Odorico; G. Cupani; P. Barai; F. Calura; T.-S. Kim; E. Pomante; E. Tescari; M. Viel
• Keywords: SIGNAL (programming language)

At low densities the standard ionisation history of intergalactic medium (IGM) predicts a decreasing temperature IGM with density once hydrogen (and helium) reionisation is complete. Heating high-redshift, low-density above expected from photo-heating difficult, and previous claims high/rising temperatures in regions Universe based on probability function (PDF) opacity Lyman-$α$ forest data at $2