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Fig. 1


V4334 Sgr spectra of the emission line detected with APEX. The width of the channels is 20 km s-1 and the dotted vertical line corresponds to the systemic velocity of the source, vsys = 125 km s-1 (Duerbeck et al. 1997). The flux density in the right axis was calculated using the corresponding value of Γ shown in Table 1. Top: spectrum of the HCN (J = 4 → 3) emission. Bottom: spectrum of the H13CN (J = 4 → 3) emission. The arrows in the upper axis indicate the rest frequencies for the CO (J = 3 → 2) and H13CN (J = 4 → 3) lines.

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