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Non-Voigt Lyman-alpha absorption line profiles
P. J. Outram, R. F. Carswell, T. Theuns
Recent numerical simulations have lead to a paradigm shift in our understanding of the intergalactic medium, and the loss of a physical justification for Voigt profile fitting of t…
The thermal history of the intergalactic medium
Joop Schaye, Tom Theuns, Michael Rauch +2
At redshifts z >~ 2, most of the baryons reside in the smooth intergalactic medium which is responsible for the low column density Lyman-alpha forest. This photoheated gas follows…
Broadening of QSO Lyman-alpha forest absorbers
Tom Theuns, Joop Schaye, Martin Haehnelt
We investigate the dependence of QSO Lyman-alpha absorption features on the temperature of the absorbing gas and on the amplitude of the underlying dark matter fluctuations. We use…
Measuring the equation of state of the intergalactic medium
Joop Schaye, Tom Theuns, Anthony Leonard +1
(Abridged) Numerical simulations indicate that the intergalactic medium (IGM) responsible for the low column density Lyman-alpha forest follows a well defined temperature-density r…
Measuring the temperature of the intergalactic medium
Joop Schaye, Tom Theuns, Anthony Leonard +1
Numerical simulations indicate that the smooth, photoionized intergalactic medium (IGM) responsible for the low column density Lyman-alpha forest follows a well defined temperature…