Table 2
Parameters used in the shell model and resulting mean temperature and density of hydrogen.
| Source | Integration | Integration limits (radii) | Emission(b) |  (H2)(c) |
 (H2)(d) |
H2 | |
|---|---|---|---|---|---|---|---|
| rstart/Tup | rend/Tlow | region | particle | ||||
| settings(a) | (model) | number(e) | |||||
| [AU]/[K] | [AU]/[K] | [′′] | [K] | [cm−3] | [#] | ||
| R CrA-IRS 5A | A | 72/100 | 10 000/10 | 153.′′8 | 12.7 | 6.1 × 104 | 8.5 × 1056 |
| B | 683/35 | 4 194/15 | 64.′′5 | 18.6 | 1.2 × 105 | 1.2 × 1056 | |
| NGC 1333-IRAS 2A | A | 207/100 | 17 000/10 | 144.′′7 | 16.2 | 3.2 × 104 | 2.2 × 1057 |
| B | 1546/35 | 7823/15 | 66.′′6 | 20.5 | 1.1 × 105 | 7.0 × 1056 | |
| L1551-IRS 5 | A | 168/100 | 14 000/10 | 200.′′0 | 16.9 | 2.6 × 104 | 9.9 × 1056 |
| B | 1265/35 | 6425/15 | 91.′′8 | 20.7 | 9.1 × 104 | 3.4 × 1056 | |
| L1544 | C | 1/12.5 | 8000/12.5 | 114.′′3 | 12.5 | 1.3 × 106 (f) | 9.1 × 1057 |
Notes. (a) Two integration settings have been used (A, B) starting at rstart and ending at rend depending on the temperature region to be covered (A = 10–100 K, and B = 15–35 K), C indicates a flat density and temperature distribution of hydrogen. (b) Outer diameter of region where our investigated molecules, e.g., H2CO or CH3OH, emit radiation according to our model. (c)Hydrogen mean temperature. (d)Hydrogen mean particle density. (e)Absolute number of hydrogen particles within integration limits. This number is used to calculate the
values in Tables 3
and 4. (f)Value from Caselli et al. (2002) for inner 40′′ region.
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