Fig. 5

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Observed CS, C34S, C33 S, and NS spectra (in TB scale, see Table 1) extracted at the emission peak: α2000 = 03h29m03.s75, δ2000 = +31°16′03.′′8. Transitions and corresponding upper level energies are reported. The vertical dashed line stands for the ambient LSR velocity (+8.6 km s−1, Chen et al. 2009). The C33S(2–1) line consists of six hyperfine components with Sμ2 in the 0.5–12.2 D2 range (Bogey et al. 1981; Lovas 2004; Müller et al. 2005) spread on a 9 MHz frequency interval. The vertical red lines (in scales according to their Sμ2) indicated their relative offset in velocity scale with respect to the brightest F = 5/2–3/2 line. The NS 9/2–7/2 Ω = 1/2 line consists of three hyperfine components (Lee et al. 1995) associated with Sμ2 in the 10.9–17.4 D2 range spread on a 0.6 MHz frequency interval. The vertical red lines (in scales according to their Sμ2) indicated their relative offset in velocity scale with respect to the brightest F = 11/2–9/2 line (see Table 1).
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