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- W2029248679 abstract "At redshifts z ≳ 2, most of the baryons reside in the smooth intergalactic medium which is responsible for the low column density Lyα forest. This photoheated gas follows a tight temperature-density relation which introduces a cut-off in the distribution of widths of the Lyα absorption lines (b-parameters) as a function of column density. We have measured this cut-off in a sample of nine high-resolution, high signal-to-noise ratio quasar spectra and determined the thermal evolution of the intergalactic medium in the redshift range 2.0–4.5. At a redshift z∼3, the temperature at the mean density shows a peak and the gas becomes nearly isothermal. We interpret this as evidence for the reionization of He ii." @default.
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- W2029248679 date "2000-11-01" @default.
- W2029248679 modified "2023-09-30" @default.
- W2029248679 title "The thermal history of the intergalactic medium" @default.
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- W2029248679 doi "https://doi.org/10.1046/j.1365-8711.2000.03815.x" @default.
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