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Table 7

Summary of C18O abundance profiles.

Source Profile X in T ev X D n de X 0
[K] [cm-3]

IRAS 2Aa Drop 1.5 × 10-7 25 ~4 × 10-8 7 × 104 5 × 10-7
IRAS 4Ab Drop ~1 × 10-7 25 5.5 × 10-9 7.5 × 104 5 × 10-7
IRAS 4Bb Jump 3 × 10-7 25 1 × 10-8 ... ...
Ser-SMM1 Drop 1.5 × 10-7 25 1.0 × 10-8 1.4 × 105 5 × 10-7
Elias29 Constant 5 × 10-7 ... 5 × 10-7 ... 5 × 10-7
GSS30IRS1 Jump 4 × 10-7 25 2 × 10-8 ... ...

Notes.Xin is the abundance of inner envelope, Tev is the evaporation temperature, XD drop zone abundance, nde is the desorption density, and X0 is the abundance of the outermost part of the envelope. See Fig. B.1 in Yıldız et al. (2010) for definition. Results from;

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