Left: large-scale velocity map of the LAB given by the CubEx software on the basis of the first moment of the Lyα emission line. The QSO position is marked by the black dot. The zero velocity corresponds to λvac = 4967.26 Å, or to − 196 km s-1 in Fig. 8 (left panel). Right: large-scale map of the velocity dispersion in the LAB given by the CubEx software on the basis of the second moment of the Lyα emission line.
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