Table 6
Comparison between calculated relative abundances with respect to CO for Oph-IRS67 B and values taken from Schöier et al. (2002) for the Class 0 protostar IRAS 16293–2422.
| Species | This work | Schöier et al. (2002) | ||
|---|---|---|---|---|
| Constant abundancea | Jump (T > 90 K)b | Jump (T < 90 K)c | ||
HCO |
[4.8 × 10−6 − 2.2 × 10−5] e | 3.9 × 10−5 | – | – |
| SO2 | [4.3 × 10−3 − 1.1 × 10−2] f | 1.7 × 10−5 | 2.8 × 10−3 | 1.3 × 10−5 |
| CH3OH | <3.5 × 10−6 | 4.8 × 10−5 | 2.8 × 10−3 | 9.8 × 10−6 |
Notes. (a) Value using a constant molecular abundance relative to H2. (b) Value using a jump in the fractional abundance and obtained for the hot part of the envelope (T > 90 K). (c) Value using a jump in the fractional abundance and obtained for the cooler part of the envelope (T < 90 K). Highlighted values are closer to our calculations. (d) Assuming standard isotope ratios for C17O (16 O/17O = 2005) and H13CO+ (12 C/13C = 69) from Wilson (1999). (e)For a range of temperatures, between 30 and 100 K. (f)For blue and red components.
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