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Table 4
Parameter values or profile of the best-fit ALI model and results.
| Parameters held constant | ||
| Distance to sourcea, dsource | 3.3 | [kpc] |
| V LSR b | 58.1 | [km s-1] |
| Envelope size, Rmax | 1.8 × 1018 | [cm] |
| IR-continuum size, Rph | 7.1 × 1016 | [cm] |
| Luminosity of sourcea, Lbol | 1.9 × 105 | [L⊙] |
| IR-temperature, Tstar | 120 | [K] |
| Gas-to-dust ratio, Mgas/Mdust | 100 | |
| Emissivity parameter, κ250 μm | 20 | [cm2 g-1] |
| Dust frequency dependence, β | 1.8 | |
| Ortho to para ratio, OPR | 0.5 | |
| Parameters profile c | ||
| Gas temperature, Tg | 15.0 r-0.61 | [K] |
| Dust Temperature, Td | 1.03 × Tg | [K] |
| H2 density, n(H2) | ||
| r< 0.075 | 2.3 × 106 | [cm-3] |
| r> 0.075 | 1.8 × 104r-2.3 | [cm-3] |
| Velocity profile, νinfall | ||
| r< 0.2 | 5.3 | [km s-1] |
| 0.2 <r< 0.7 | 2.7 | [km s-1] |
| r> 0.7 | f = 0.3 | |
| M0 = 1 | [M⊙] | |
| a = 1 | ||
| Micro turbulence, νturb | ||
| r< 0.9 | 1.0 | [km s-1] |
| r> 0.9 | 1.6 | [km s-1] |
| Abundance, X(NH3) | ||
| r< 0.145 | 1.2 × 10-9 | |
| 0.145 <r< 0.7 | 0.8 × 10-9 | |
| r> 0.7 | 2.0 × 10-9 | |
|
|
||
| Results | ||
| N(p-NH3) | 9.1 × 1014 | [cm-2] |
| N(o-NH3) | 4.6 × 1014 | [cm-2] |
| N(H2) | 8.4 × 1023 | [cm-2] |
| M(G34)d | 2700 | [M⊙] |
| Ṁ acc e | ||
| r = Rph | 4.1 × 10-3 | [M⊙ yr-1] |
| r = 0.075 Rmax | 4.5 × 10-2 | [M⊙ yr-1] |
| r = 0.2 Rmax | 1.7 × 10-2 | [M⊙ yr-1] |
| r = 0.7 Rmax | 4.5 × 10-3 | [M⊙ yr-1] |
Notes.
(e)
see Eq. (6).
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