Which molecule traces what: Chemical diagnostics of protostellar sources

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Fig. 8

Spectra obtained at the cavity wall positions for hydrocarbons (red) and ice-mantle tracers (blue). Left: C₂H 3_2.5,2 –2_1.5,1 (E_up = 25 K) and CH₃OH 2_1,0 –1_0,1 (E_up = 28 K) spectra for S68N. Middle: C₂H 3_2.5,2 –2_1.5,1 (E_up = 25 K) and SO 6₇–5₆ (E_up = 48 K) spectra for B1-c. Right: c-C₃H₂ 4_4,1 –3_3,0 (E_up = 32 K), H₂CO 3_2,1 –2_2,0 (E_up = 68 K), and ¹³CS 5–4 (E_up = 33 K) spectra for SMM3.

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