Table 4
Physical parameters and injected species abundances (with respect to H nuclei) used in the chemical modeling (Sect. 5).
| Physical parameters of the shocked gas | ||||
|---|---|---|---|---|
| Parameter | Reference model | Ref. | Range | Best models (Fig. 4) |
| nH (cm−3) | 8.0 × 105 | 1 | (4-16) × 105 | 8 × 105 |
| Temperature (K) | 90 | 1 | 50-150 | 80-130 |
| ζCR (s−1) | 6.0 × 10−16 | 2,* | (3.0-12.0) × 10−16 | 6.0 × 10−16 |
| Injected species abundances, with respect to H | ||||
| Species | Reference model | Ref. | Range | Best models (Fig. 4) |
| H2O | 1.0 × 10−4 | 3, 4 | (0.25-4.0) × 10−4 | (0.1-1.0) × 10−4 |
| CO2 | 3.0 × 10−5 | 2, 4 | (1.5-6.0) × 10−5 | 3.0 × 10−5 |
| NH3 | 1.0 × 10−5 | 5 | (1.0-4.0) × 10−5 | 1.0 × 10−5 |
| CH3OH | 4.0 × 10−6 | 6 | (2.0-8.0) × 10−6 | 4.0 × 10−6 |
| OCS | 1.0 × 10−6 | 2 | (1.0-4.0) × 10−6 | 1.0 × 10−6 |
| SiO | 1.0 × 10−6 | * | (0.5-2.0) × 10−6 | 1.0 × 10−6 |
| Si | 1.0 × 10−6 | * | (0.5-2.0) × 10−6 | 1.0 × 10−6 |
| H2CO | 5.0 × 10−7 | 5 | (0.5-2.0) × 10−6 | 5.0 × 10−7 |
| CH3CH2 | 0 | 5 | (0-20) × 10−8 | 0 |
| CH3CHO | 0 | 5 | (0-4.0) × 10−8 | 0 |
| NH2CHO | 0 | 5 | (0-4.0) × 10−9 | 0 |
| C2H5OH | 2.0 × 10−7 | 7,* | (5.0-40.0) × 10−8 | 2.0 × 10−7 |
| CH2OHCHO | 0 and 1.5 × 10−8 | * | 0 and 1.5 × 10−8 | 0 |
Notes. The first column reports the parameters; the second column the values adopted in the reference model; the third column refers to the articles from which those values are taken; the fourth column gives the range used in the model grid; the last column provides the values of the parameters that best reproduce the observations: please note that there is a degeneracy on the values of temperatures (which was varied between 80 and 130 K) and the abundance of water injected into the gas (between 0.25 and 1 ×10−4. Upper part : physical parameters of the shocked gas: density nH, temperature Tgas and cosmic-ray ionization rate ζCR. Bottom part : abundances of the species injected into the gas phase after the passage of the shock. Note that we ran two times the reference model, one assuming no glycolaldehyde on the grain-surfaces and the other assuming that all the observed glycolaldehyde abundance (7 × 10−9) is injected from grain mantles. 1 – Codella et al. (2020), 2 – Podio et al. (2014), 3 – Busquet et al. (2014), 4 – Boogert et al. (2015), 5 – López-Sepulcre et al. (2024), 6 – Benedettini et al. (2013), 7 – Lefloch et al. (2017). The * corresponds to abundances not well constrained but used in previous works (see Podio et al. 2014; Codella et al. 2017; Tinacci et al. 2023; Giani et al. 2023; López-Sepulcre et al. 2024).
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