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Correlations in the three-dimensional Lyman-alpha forest contaminated by high column density absorbers

Correlations in the three-dimensional Lyman-alpha forest contaminated by high column density absorbers

Correlations measured in three dimensions in the Lyman-alpha forest are contaminated by the presence of the damping wings of high column density (HCD) absorbing systems of neutral hydrogen (H i; having column densities |$N(\rm H\,{\small I}) > 1.6 \times 10^{17}\, \mathrm{atoms}\, \mathrm{cm}^{-2}$|⁠), which extend significantly beyond the redshift-space location of …