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Fig. 3

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JHK-band spectra of IRAS 1835−06 (black, solid lines) and IRC +10420 (red, dotted) with transitions due to the Paschen and Brackett series, Fe ii, [Fe ii], Na i and Ti ii indicated. Peak intensity of the Paβ line is ~5.2 and ~3.4 times continuum for IRAS 1835−06 and IRC +10420 respectively. Spectra have been corrected for apparent radial velocity as described in Fig. 1.

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