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Fig. 3

image

Spectra extracted from the five regions (RN, RS, RW, RE, RC) illustrated in Fig. 2. The right panels show a zoom-in on the H 2 1–0 S(1) line, centred at the systemic velocity of PKS B1718–649. The dashed line shows the fit with a single Gaussian component, while the dotted line shows the residuals. In the bottom panel, solid lines indicate the locations of the H 2 1–0 S(0, 1, 2, 3) lines, while dashed and dotted lines show the H 2 2–1 S(1, 3) and [Si vi] and Brγ lines, respectively.

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