Fig. 1
Spectra at the wavelengths of several H
lines observed. From top to bottom: Q(1,0) and Q(1,1) by iSHELL at IRTF; R(1,1)u, R(1,0), R(3,3)l, and R(2,2)l by CRIRES at the VLT. There is no detection of R(3,3)l and R(2,2)l. The velocity interval containing previously observed systemic velocities of CRL 2136 IRS 1 (15–35 km s−1) is shown by dotted vertical lines.
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