Table 7
Luminosities in Sgr B2 (envelope, main cores, and total).
| Region |  |
LCO | L[C i ] | L[N ii] | LH_2O, 752 | LCO / LFIR | L[C i] / LFIR | L[N ii] / LFIR |
|---|---|---|---|---|---|---|---|---|
| [L⊙] | [L⊙] | [L⊙] | [L⊙] | [L⊙] | (10−4) | (10−4) | (10−4) | |
| Envelope | (2.6 ± 0.5) × 107 | (9 ± 2) × 103 | (13 ± 3) × 102 | (17 ± 3) × 102 | 56 ± 11 | 4 ± 1 | 0.5 ± 0.1 | 0.7 ± 0.2 |
| Main star- | (0.6 ± 0.1) × 107 | (1.2 ± 0.2) × 103 | (0.9 ± 0.2) × 102 | (1.0 ± 0.2) × 102 | 37 ± 7 | 2.0 ± 0.7 | 0.15 ± 0.06 | 0.17 ± 0.07 |
| forming cores | ||||||||
| Total | (3.3 ± 0.7) × 107 | (11 ± 2) × 103 | (14 ± 3) × 102 | (18 ± 4) × 102 | 93 ± 20 | 3 ± 1 | 0.4 ± 0.1 | 0.6 ± 0.2 |
Notes. The area around the main star-forming cores (~12 pc2) corresponds to the “moderate density” region of Schmiedeke et al. (2016). The total region is the entire mapped region, that is a rhombus with a 43.8 pc diagonal (area of ~960 pc2). The envelope region (~948 pc2) is the difference between the main star-forming cores and the total mapped area. The
masses we compute in the envelope, main star-forming cores, and entire region are 8.9 × 106 M⊙, 2.3 × 106 M⊙, and 1.1 ×107 M⊙, respectively.(a) LFIR from 40 to 500 μm and adopting D = 8.18 kpc.
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