Open Access
Table 2
Parameters of the physical models for Sgr B2(N2-N5).
| Parameters | N2 | N3 | N4 | N5 |
|---|---|---|---|---|
| tstart = −1.0 × 106 yr | ||||
| rstart (au) | 4.46 (5) | 9.46 (3) | 3.21 (5) | 3.06 (5) |
| nstart (cm−3) | 3.00 (3) | 3.00 (3) | 3.00 (3) | 3.00 (3) |
| Av-start (mag) | 2.0 | 2.0 | 2.0 | 2.0 |
 (K) |
16.0 | 16.0 | 16.0 | 16.0 |
| Tg-start (K) | Tmin | Tmin | Tmin | Tmin |
| Lstart (L⊙) | 0 | 0 | 0 | 0 |
| t0 = 0 | ||||
| rcollapse (au) | rstart | rstart | rstart | rstart |
| ncollapse (cm−3) | 2.14 (4) | 2.19 (6) | 1.00 (4) | 1.86 (4) |
| Av-collapse (mag) | 75.3 | 297 | 19.1 | 43.7 |
| Td-collapse (K) | Tmin | Tmin | Tmin | Tmin |
| Tg-collapse (K) | Tmin | Tmin | Tmin | Tmin |
| Lcollapse (L⊙) | 0 | 0 | 0 | 0 |
| tfinal | ||||
| tfinal (yr) | 2.10 (5) | 2.06 (4) | 3.07 (5) | 2.25 (5) |
| rfinal (au) | 1.38 (3) | 5.70 (2) | 1.32 (3) | 1.42 (3) |
| nfinal (cm−3) | 8.27 (7) | 1.48 (8) | 3.81 (7) | 5.91 (7) |
| Av-final (mag) | 500 | 500 | 500 | 500 |
| Td-final (K) | 400 | 400 | 400 | 400 |
| Tg-final (K) | 400 | 400 | 400 | 400 |
| Lfinal (L⊙) | 2.63 (5) | 4.71 (4) | 3.92 (5) | 2.82 (5) |
Notes. Physical properties derived or assumed for each source at three different stages of the high-mass star formation process (see also Fig. 3). X (Y) means X × 10Y. (a) Td-start = 16 K is valid for the models with Tmin = 10 and 15 K. For Tmin = 20 K, Td-start = 20 K.
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