Open Access
Fig. 2.
Spectra of HCN, H13CN, and HC15N (from top to bottom) from the Keplerian mask at 2.83 km s−1 (systemic velocity) and averaged within annuli centered at radii r = 5 to 55 au. The specific intensity scale is K using K/(Jy beam−1) conversion factors of 178.7, 188.1, and 189.0 for HCN, H13CN, and HC15N, respectively.
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