Fig. 7
HI VGPS spectrum of G18.93/m in black with the GRS 13CO spectrum in red on top. The strong absorption feature of G18.93/m at ~45 km s-1 in the Hispectrum agrees very well with the 13CO signature. The smooth line indicates the 3rd order fit to the Hispectrum that has been used to subtract the “continuum”. (For details see text.)
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