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Table 3

Visual extinction ranges at which our model reproduces the observations within their error bars.

Species AV (mag)
Core region (AV ≳ 3 mag) PDR region (AV ≲ 3 mag)
4.64 × 104 yr 1 × 106 yr 4.64 × 104 yr 1 × 106 yr
HCO [ 3.9 − 4.2; ≳ 6.5 ] * ≳ 5.4(∗) − [ 5.4 − 5.7; ≳ 13 ] [ 0.9 − 3.0 ] (∗) − [ 1.8 − 2.1 ] [ 0.9 − 3.0 ] (∗) − [ 1.8 − 2.1 ]
H2CO [ 3.3 − 4.1 ] * ≳ 5.3(∗) − [ 5.3 − 5.7; ≳ 15 ] [ 0.6 − 1.9 ] (∗) − [ 1.1 − 1.4 ] [ 0.6 − 1.8 ] (∗) − [ 0.9 − 1.2 ]
CH3OH ≳ 5.4 * ≳ 5.5(∗) − [ ~ 5.5;6.7 − 10 ] [ 0.5 − 1.5 ] (∗) − [ 0.7 − 0.9 ] [ 0.5 − 1.4 ] (∗) − [ 0.7 − 0.8 ]
CH3CCH ≳ 3.0(∗) − ≳ 3.5 ≳ 3.0(∗) − [ 3.8 − 4.8;5.9 − 6.4 ] [ 2.3 − 3.0 ] (∗) − [ 2.7 − 3.0 ] [ 2.3 − 3.0 ] (∗) − [ 2.7 − 3.0 ]
H2CCO ≳ 4 * [ 3 − 5.3;5.7 − 6.3 ] * [ 2.0 − 3.0 ] * [ 1.9 − 3.0 ] *
CH3CHO ≳ 4.2 * [ 3.7 − 5.4;5.6 − 6.5 ] (∗) − [ 4.5 − 5.1 ] [ 1.9 − 2.9 ] * [ 1.7 − 2.7 ] *
HCOOH [ 3.0 − 3.8 ] - ≳ 4.2* [ 3.0 − 5.2 ] (∗) − [ 3.0 − 3.5;4.6 − 4.9 ] [ 2.6 − 3.0 ] * [ 2.6 − 3.0 ] *
CH3CN – ≳ 5.9 * [ 2.3 − 3.0 ] (∗) − [ 2.6 − 2.7 ] [ 2.3 − 3.0 ] (∗) − [ 2.6 − 2.7 ]
HC3N – [ 7 − 10 ] * [ 0.9 − 2.5 ] (∗) − [ 1.7 − 2.0 ] [ 0.9 − 2.5 ] (∗) − [ 1.8 − 2.1 ]
C3N – ≳ 6.4 * [ 0.7 − 2.7 ] (∗) − [ 1.0 − 2.1 ] [ 0.7 − 2.7 ] (∗) − [ 1 − 2.1 ]
4.64 × 102 yr 1 × 106 yr 4.64 × 102 yr 1 × 106 yr
C2H ≳ 6.5 * [ 3 − 6.5 ] (∗) − ≳ 6.5 * [ 0.18 − 3.0 ] (∗) − [ 0.19 − 0.38 ] [ 0.18 − 3.0 ] (∗) − [ 0.36 − 0.6;1.3 − 2.0 ]
c–C3H – – [ 0.18 − 1.1;1.8 − 3.0 ] (∗) − [ 0.18 − 0.20 ] [ 0.33 − 2.8 ] (∗) − [ 0.6 − 1 ]
l–C3H – – [ 0.18 − 1.1;1.8 − 3.0 ] (∗) − [ 0.18 − 0.20 ] [ 0.33 − 3.0 ] (∗) − [ 0.6 − 1 ]
c–C3H2 – – [ 0.18 − 1.2;1.8 − 2.6 ] (∗) − [ 0.19 − 0.26 ] [ 0.35 − 2.8 ] (∗) − [ 0.75 − 0.95 ]
l–C3H2 – – [ 0.18 − 3 ] (∗) − [ 0.19 − 0.33 ] [ 0.38 − 3.0 ] (∗) − [ 0.7 − 1 ]
C3H+ ≳ 3 ≳ 6.5 [ 0.16 − 2.3 ] (∗) − [ 0.18 − 0.28;1.5 − 1.8 ] [ 0.14 − 1.8 ] (∗) − [ 0.25 − 0.6;1.1 − 1.4 ]
CF+ ≳ 3 ≳ 3 [ 0.02 − 0.6 ] [ 0.07 − 0.8 ]

Notes.

(*)

While these species are under- or over-estimated by a factor of a few in the regions of interest, if we assume an arbitrary error factor of ten on the modeled abundances, these results are still consistent with the observations.

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